Hci 214 activity 1

Study Guide
Basic Medical Coding
Using ICD-10
By
Sheila McCray
Introduction to Coding
Lesson 1
Medical coders review the documents in the patient’s medical
record and abstract (collect clinical data) or retrieve information from specific documents. They then assign numeric or
alphanumeric codes to each piece of data they retrieve.
Medical coders must use their skills in research, reasoning,
and interpretation of medical coding guidelines to ensure that
physicians and hospitals are reimbursed accurately and completely for the services that they provide.
This part of your program will introduce you to this exciting
field. You’ll learn all about ICD-10 medical coding and the
steps involved in assigning diagnosis and procedure codes
using this code set. The material that follows will lead you
step-by-step through a wide range of ICD-10 coding examples, offering invaluable tips and suggestions that you can
use along the way. The same tips and suggestions that you
use in Basic Medical Coding Using ICD-10 will also serve as
a foundation for your next two courses, Intermediate Medical
Coding and Advanced Medical Coding Scenarios. You’ll also
find Quick Checks and Exercises in your textbook. Be sure to
complete all of these additional practice tools to help you
fine-tune coding skills, master the fine points of ICD-10 coding, and learn about a wide range of medical terms. Doing so
will further sharpen your skills, strengthen your ability to
accurately interpret these terms, and, in turn, translate these
terms into accurate code.
By choosing to learn medical coding, you’re embarking on a
journey that essentially means learning a new language.
Although this new language may seem a bit complicated and
overwhelming at first, it becomes easier once you learn the
basics of ICD-10 coding (and with lots and lots of practice).
Your confidence will increase as you learn the basics and
then apply what you learn to basic coding scenarios.
The important thing to remember is that you don’t ever have
to feel lost. The coding steps, along with the coding guidelines, tell you exactly what you need to do. If you do feel
yourself getting off track though, connect with other students
in the program on the Medical Billing and Coding Academic
Space on the Penn Foster Community. You can see if other
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students are encountering the same difficulties and learn
how they’ve overcome these difficulties. You can also create
study groups and find study buddies to help make your
learning experience even better.
Your instructor is also a valuable resource. You can connect
with your instructor on the Medical Billing and Coding
Academic Space. It’s always much better to ask for help,
rather than become frustrated and try to figure things out on
your own. As you move forward, you’ll find yourself becoming
more comfortable with the medical terms, processes, and procedures that coders use every day. Just remember not to put
too much pressure on yourself to master coding overnight.
When you begin to code, don’t expect to get every single code
right—you won’t. The key to learning medical coding is being
willing to make mistakes. Experienced coders had to make
many coding errors along the way to gain the experience they
now have. When you make an error in your code selection,
retrace your steps and find out where you went wrong, so the
next time you’ll be less likely to make the same mistake.
Remember that a mistake is never a mistake if you learn
from it! Keep this in mind as you move forward through your
coding courses.
By the time you finish Basic Medical Coding Using ICD-10,
you’ll have gained many of the skills you need to accurately
assign ICD-10 codes.
As a medical coder, you’ll use the ICD-10-CM (often called
ICD-10 or I-10), to assign different codes depending on the
circumstances surrounding the patient encounter. The
patient encounter is the episode of care that takes place on
one or more specific dates, when the physician evaluates the
patient and provides treatment. During the encounter, the
patient relates the symptoms or chief complaint that brought
the patient to the office, clinic, or hospital. Based on the
patient’s reported symptoms, as well as the results of any
examinations, x-rays, laboratory reports, or specialist consultations, the physician will determine the most likely cause of
the patient’s symptoms, or diagnosis. If the patient comes in
complaining of coughing, sneezing, and congestion, the
physician may ultimately determine that the patient has the
flu. As a coder, you’d assign the diagnosis code for flu, along
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Basic Medical Coding Using ICD-10
with codes that pertain to the service or treatment provided
in relation to the patient’s flu. Likewise, if the patient is seen
because of difficulty walking due to a swollen ankle, an x-ray
may reveal a fracture, in which case the physician’s diagnosis
would be ankle fracture. The physician may also determine
that the patient has more than one diagnosis, in addition to
the one that brought him or her to the office. The physician
may determine that in addition to the fractured ankle, the
patient has several chronic conditions that require treatment.
Examples of chronic conditions include hypertension, diabetes mellitus, and any conditions that require ongoing
treatment or monitoring and regularly prescribed medication.
You’d assign diagnosis codes for the fractured ankle and the
chronic conditions that require ongoing treatment.
As a medical coder, you’ll use the ICD-10-CM to look up the
patient’s diagnosis (or diagnoses if there’s more than one).
After you find the diagnosis, you’ll review the code descriptions, follow any additional instructions that are provided in
the ICD-10-CM regarding code assignment, and then assign
your code. You’ll then follow the same process to assign subsequent diagnosis codes. If you’re working as an inpatient
coder, you’ll also use the ICD-10-CM to assign procedure
codes for inpatient surgical procedures.
OBJECTIVES
When you complete this lesson, you’ll be able to
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Define the process of medical coding
Explain the tools used by medical coders
Outline the skills necessary for a successful career in
medical coding
Summarize examples of medical coding certifications
Describe other careers in medical coding
Summarize the history of medical coding
Explain the process of general equivalence mapping
Summarize how to use ICD-10-CM
Lesson 1
11
ASSIGNMENT 1
Read through the following material in your study guide.
Then, read the Introduction in your textbook, Step-by-Step
Medical Coding.
Introduction to Medical Coding
Recent changes in healthcare have created a great demand
for medical coders. An older population; advances in technology; an increased demand for healthcare services; and an
increase in the number of medical tests, treatments, and procedures means that the number of people seeking healthcare
services has increased. Additionally, the increased use of outpatient facilities means that the government is exerting
greater control and becoming more involved with services
provided to Medicare and Medicaid patients. These changes
in healthcare have resulted in an increased demand for certified medical coders.
Prominent healthcare organizations in the field of medical
coding include the American Health Information Management
Association (AHIMA) and the American Academy of
Professional Coders (AAPC). Both of these organizations offer
credentials in medical coding. Certifications offered by both
organizations are nationally recognized and accepted by
healthcare employers worldwide. Most coders choose to sit for
one of four certifications: the CPC-A, CPC, CCS, or CCS-P.
The CPC-A and the CPC are both offered by the AAPC. CPC
(Certified Professional Coder) indicates that you’ve completed
the necessary educational requirements and now have experience in the field. In CPC-A, the A stands for apprentice. The
CPC-A demonstrates that you’ve completed the necessary
educational requirements for a career in coding, but haven’t
yet obtained the required experience in reviewing, abstracting, interpreting, and correctly assigning codes. After you
earn the required two years of full-time coding experience,
the A is dropped from the credential and you become a CPC.
CCS and CCS-P are certifications offered by AHIMA. CCS
(Certified Coding Specialist) demonstrates that you’ve gained
proficiency in assigning codes to inpatient as well as outpatient
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Basic Medical Coding Using ICD-10
medical records. CCS-P indicates that a coder is adept at
coding medical records in the outpatient setting, such as in
the physician’s office, emergency room, or clinic. Although
many coders do, it isn’t necessary to earn more than one
credential to demonstrate proficiency in a certain area of coding. At least one credential is needed to gain entry into the
field of medical coding.
Basic Medical Coding Using ICD-10, Intermediate Medical
Coding, and Advanced Medical Coding Scenarios combine in
one comprehensive package to prepare you to sit for the
CPC-A exam, pass the exam, and become a working medical
coder!
Success in medical coding means being able to convert
medical terms into standardized numeric and alphanumeric
codes for physician and hospital reimbursement. The rule
of thumb for medical coding is: If it wasn’t documented, it
wasn’t done.
While coders are primarily concerned with correct interpretation
of coding guidelines, accurate code assignment, and optimized
reimbursement for physicians and hospitals, medical coding
also involves ethical concerns. Medical coders must ensure
that the codes they select accurately reflect what’s in the
patient’s medical record. All diagnosis and procedure codes
should be assigned based strictly on the content of the medical record.
Coders use standardized code sets to assign codes for
diagnoses, procedures, drugs, medical devices, supplies,
and equipment. (You’ll learn more about the code set used
for drugs, medical devices, supplies, and equipment in
Intermediate Medical Coding). Accurate and complete coding
helps minimize turnaround in terms of medical claims processing, and as a result, it helps expedite reimbursement for
physicians and hospitals. In addition to increasing the likelihood of faster claims turnaround, accurate and complete
coding also minimizes the likelihood of fraud. Medical coders
are required by law to assign codes based only on the documentation in the medical record. Assigning codes that aren’t
supported by the medical record to increase reimbursement
constitutes fraud and can result in civil and criminal penalties for healthcare facilities.
Lesson 1
13
Proficiency in medical coding means learning both how to
determine the specific piece of data that requires a code
assignment and the rules for assigning your codes.
Note: As you proceed through your assigned reading, be sure to
complete the Quick Checks and Exercises, which will reinforce the
reading material.
Coders use two types of tools to assign codes: textbooks
and/or encoders. Encoders are coding software programs that
you can use to locate and assign diagnoses and procedure
codes. However, when you test for a medical coding certification such as the CPC-A, you’ll be required to use your coding
textbooks to assign codes. The textbooks that you’ll use in
this course are
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The International Classification of Diseases, 10th
Revision, Clinical Modification (commonly referred to as
ICD-10-CM)
The International Classification of Diseases, 10th
Revision, Procedure Coding System (commonly referred
to as ICD-10-PCS)
To be successful in medical coding, you must be
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Detail oriented. In medical coding, the old adage “little
things mean a lot” is especially true. The descriptions for
two codes may be identical except for one word. That one
word may be the difference in choosing code A vs. code B.
If you’re good at picking up on the little things, then
you’ll enjoy coding.
A detective. If you like being a sleuth and researching
coding guidelines to understand how, when, and where
you should assign a specific code, then you’ll like medical coding.
A good storyteller. Much of coding involves reading the
medical record and then painting a mental picture in
your mind of what took place, as if you were right there
in the doctor’s office or emergency room. If you can visualize what occurred based on what you read in the
medical record, you’ll love medical coding.
Basic Medical Coding Using ICD-10
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Analytical. If you’re good at analyzing pieces of information from different documents in the same record and
finding contradictory information, then medical coding
is a great career choice for you. Maybe you’re working
on a medical chart for a patient who was admitted to the
hospital. Dr. Brown’s report indicates that the patient
has diabetes, which is well controlled on insulin, but Dr.
Smith’s report indicates that the patient has diabetes,
but it isn’t well controlled on insulin. These are two different doctors saying two different things about the same
patient’s diabetes, and hence, these two statements
would translate into two different diabetes codes for the
same admission. You would need to determine which
statement is correct so that you can assign the right code.
In the previous example, you’d need to send a query to the
hospital to determine whether the patient’s diabetes is controlled or out of control. You’d then assign your diabetes code
based on the answer that you receive from the hospital, and
the answer would be placed in the patient’s medical record so
that the record is kept up to date.
You develop each of these skills as you proceed through
Basic Medical Coding Using ICD-10, as well as the courses
that follow.
In addition to being able to accurately review and abstract
clinical data from the medical record, good computer skills
are essential to your success as a medical coder for several
reasons.
1. If you work from home, you’ll need to set up a connection to your employer’s office or the hospital client that
you’re assigned to in order to access medical charts.
Your company’s IT department or the hospital’s technical
support department will help you do this. You may need
to access and navigate specific websites and download
certain programs in order to sign in to the system and
begin to code your charts. The setup process should be
relatively simple, but you’ll need to be able to follow the
directions provided by the IT person to set up the website links on your computer and begin coding.
Lesson 1
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2. On a daily basis, you’ll log in to the website provided by
your company, retrieve charts, open reports within each
chart, and review the documents in order to locate your
codes.
3. You’ll also need to go online to research medical or
surgical terms that pertain to a specific diagnosis or procedure. This is why it’s important to complete courses in
medical terminology, anatomy, and physiology in addition to your coursework in medical coding.
Once you start working as a coder, you’ll find that the opportunities in coding are plentiful, from coding for doctors’
offices and hospitals to educating new coders. You’ll likely
have more than one kind of coding position during your
career. You might initially start working as a medical coder
and later become a medical coding auditor, for example. A
medical coding auditor reviews the charts coded by the medical coders, pinpoints errors, and provides feedback on
making corrections. The auditor also provides references to
supplemental coding documents to help coders improve their
accuracy. You might become a medical coding supervisor,
overseeing a team of medical coders and assigning accounts.
Or, you may choose to specialize in one particular area of
medical coding, such as cancer registry, where you review
medical records and capture diagnoses for cancer patients,
and obtain a medical coding certification in cancer registry.
Now that you’ve completed Assignment 1, it’s time to review
the Introduction to Step-by-Step Coding. As you review the
Introduction, you’ll learn more about the anticipated job
growth in the medical coding field, as well as the salaries for
credentialed medical coders, categorized by region, job
responsibility, workplace, work setting, and job level.
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Basic Medical Coding Using ICD-10
ASSIGNMENT 2
Read through the following material in your study guide. Then,
read Chapter 2, pages 26–40, of your textbook, Step-by-Step
Medical Coding.
History of ICD-10 Medical Coding
In order to understand the history of ICD-10-CM in relation
to medical coding, it’s necessary to understand how ICD-10CM evolved and why it’s necessary for accurate coding.
The United States started using ICD-10 to report mortality in
1999, but didn’t fully adopt ICD-10 until October 1, 2015.
However, the United Kingdom actually began using the ICD-10
in 1995, along with 200 other countries, that used all or part
of ICD-10. The World Health Organization (WHO) still maintains the ICD, although they stopped supporting the ICD-9 in
2012. The Centers for Medicare and Medicaid Services (CMS)
along with the American Hospital Association (AHA) and the
National Center for Health Statistics (NCHS) are responsible
for maintaining the ICD-10-CM and ICD-10-PCS. ICD-10-PCS
replaced ICD-9-CM Volume 3 as the component used to
assign procedure codes for patients having surgery in the
hospital. We’ll cover ICD-10-PCS later in this course.
ICD-10-CM was created for several reasons. First, ICD-9-CM
had run out of room to expand. New diseases and new disorders are constantly being discovered, and the ICD-9-CM code
set didn’t have room for any new codes. Since the ICD-9-CM
code structure didn’t include sufficient detail about the
patient’s condition, these codes needed to be revised for
greater specificity and more comprehensive coverage of each
element of the patient’s diagnosis.
ICD-10 is a new and improved version of the old ICD-9 code
set. The ICD-10 is like a huge rubber band that can stretch
to put more detail into each code, thereby eliminating the
need for multiple codes while simultaneously improving
specificity. The reason that more information can be packed
into each ICD-10 code is because of its revised structure.
ICD-10 incorporates common fourth- and fifth-character subclassifications in one code. For example, F10.14 (alcohol
Lesson 1
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abuse and alcohol-induced mood disorder) uses one code for
both conditions. Each ICD-10 code can accommodate six
characters, and even expand to seven characters, whereas
ICD-9 codes only contained four digits and could only expand
to a maximum of five characters. In a case involving a patient
with complications resulting from diabetes mellitus, for example, the coder would have had to assign two codes: one for
the diabetes mellitus and one for the complication resulting
from it. However, ICD-10 can expand to combine everything
in one code.
Symptoms can be combined with the diagnosis in the same
code. Injury codes can be expanded to include more details,
such as whether the patient is being seen the first time for the
injury, whether it’s a subsequent visit, or whether the visit is
due to a sequel, an aftereffect of a disease or injury. A patient
who is diagnosed with abusing alcohol and also having mood
disorders because of the alcohol abuse can now be assigned
to one code in ICD-10, rather than two codes in ICD-9.
The structure of ICD-10-CM is similar to the structure of the
old ICD-9-CM, but the new ICD-10 code set includes two
additional chapters: one pertaining to diseases of the eye, and
one pertaining to diseases of the ear. ICD-10 also adds information pertaining to ambulatory and managed care visits.
In summary, improvements offered with ICD-10-CM include
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Adding information that pertains to ambulatory and
managed care visits
Expanded codes pertaining to injury
Extensive injury code expansion to increase the specificity of each code
Combining diagnoses and symptoms in one code,
thereby reducing the number of codes required to report
a condition
Adding a sixth character to the diagnosis code
Incorporating subclassifications of fourth- and fifth
characters
Basic Medical Coding Using ICD-10
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Updating codes for diabetes mellitus and making them
more specific
Making code assignment more specific
Unlike ICD-9-CM, the category codes in the ICD-10-CM begin
with a letter. The following sample illustrates the structure of
the ICD-10-CM system:
Chapter 1: Certain Infectious and Parasitic Diseases
(A00-B99)
Chapter 2: Neoplasms (C00-D49)
Chapter 3: Diseases of the Blood and Blood-Forming
Organs (D50-D89)
Chapter 4: Endocrine, Nutritional and Metabolic Diseases
(E00-E89)
Chapter 5: Mental, Behavioral and Neurodevelopmental
Disorders (F01-F99)
General Equivalence Mapping (GEM)
You may wonder how to confirm whether you have the correct ICD-10-CM equivalent code that matches the code that
you would have chosen in the earlier ICD-9-CM code set. The
general equivalence mapping (GEM) files were developed to
help you map ICD-10 codes back to the old ICD-9 code set
and vice-versa. General equivalence mapping is bidirectional,
meaning that you can map the new ICD-10 codes back to the
original ICD-9 codes, and map the original ICD-9 codes to the
new ICD-10 codes.
Mapping ICD-9 codes to ICD-10 codes is called forward
mapping. When you map ICD-10 codes back to their original
ICD-9 codes, the process is called backward mapping. One
thing to keep in mind: when you review the GEM files to
determine the equivalent mapping codes, you’ll notice that
the GEM files don’t include decimals. Remember this when
you map your codes. You’ll have to mentally insert the decimal point so that you understand the code that you’re seeing
in the GEM file. For example, in ICD-9-CM, the diagnosis
code for salmonella meningitis was 003.21. When you locate
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this ICD-9-CM code in your GEM file, you’ll see 00321, without the decimal. The new equivalent ICD-10-CM code is
A02.21. So the old ICD-9-CM code 003.21 maps directly to
the new ICD-10-CM code, which is A02.21. This is an example of forward mapping. If you found the ICD-10-CM code
first, and then found the old ICD-9-CM code second, you
would have done backward mapping.
There’s one GEM file for forward mapping and one GEM file
for backward mapping. The GEM file for forward mapping
has three columns in this order: ICD-9, ICD-10, and Flag.
The GEM file for backward mapping also has three columns:
ICD-10, ICD-9, and Flag. It all depends on the direction that
you’re going in terms of mapping your codes. Source code is
the code that you’re mapping from and target code is the
code that you’re mapping to. If you’re doing forward mapping
from the old ICD-9 to the new ICD-10, your ICD-9 code is the
source code and your ICD-10 code is the target code. If you’re
doing backward mapping from the new ICD-10 to the old
ICD-9, your source code becomes your ICD-10 code, and
your target code now becomes your ICD-9 code. The Flag
column tells you whether you have a direct match between
the two codes. The flags are five-digit numbers that appear in
the third column of your GEM file. Each digit occupies a certain position in the overall flag number. The numbers are a
combination of 0s, 1s, and 2s.
There are three types of flags:
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Approximate. You have an exact match.
No Map. Sorry, you don’t have an exact match; no similar codes available.
Combination. You have a match, but your source code
maps to more than one code in the target system.
Your goal is to match your ICD-10 code to the previous
ICD-9 code and vice-versa, to make sure you select the correct ICD-10 code that corresponds to the old ICD-9 code. The
process is similar to translating a word in English to another
language; you want to ensure that your translation is accurate. Sometimes your code match won’t be perfect, and you’ll
have to add more codes to get a perfect combination for the
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Basic Medical Coding Using ICD-10
coding scenario that you’ve indicated in the medical record.
You may not always be able to make an exact match between
a diagnosis in ICD-10 and a diagnosis in ICD-9.
Here are some examples of the types of flags that you’ll see in
the third column of the GEM file:
Flag# 00000. This means you have an exact diagnosis
match between ICD-9 and ICD-10.
Flag# 10000. This means you have multiple diagnoses
that might be a potential match between the old ICD-9
and the new ICD-10. For example, code 733.95 in ICD-9CM (stress fracture of other bone) maps to 16 possible
new codes in ICD-10-CM. This is what flag# 10000 is
telling you: there are multiple possibilities. There isn’t a
one-size-fits-all code available in this particular example.
You have to review the medical record and choose the
code that describes the specific encounter from one of the
16 possible choices in ICD-10-CM.
Flag# 11000. A 1 in the second slot of the flag number
tells you that you have a no map (or no match) because
there’s no similar code that maps between the old ICD-9
and the new ICD-10. You’ll also see NoDx listed in one of
the columns to indicate this.
Flag# 10112. A 1 in the third slot of the flag number tells
you that you do have a diagnosis match between the old
ICD-9 and the new ICD-10, but there’s more than one
code in the target system that might be the perfect match.
This is called the combination field.
Flag# 10112. The fourth slot of the flag number is the
scenario field. This is a mapping situation that involves
multiple codes, and a 1 in this slot indicates that there’s
only one possible variation of diagnosis code combinations
in the source code.
Flag# 10111. A 1 in the fifth slot of the flag number tells
you that this is the choice field. The fifth slot tells you the
possible number of target codes that make one complete
coding scenario when you combine them. One example is
ICD-9-CM codes 995.92 and 785.52. Code 995.92 was the
ICD-9 code for severe sepsis, and 785.52 was the ICD-9
code for septic shock. The rules for septic shock indicated
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that 995.52 needed to be sequenced first, followed by
785.52. This is the only combination that could be
assigned when the patient was diagnosed with septic
shock. These two codes went together. The scenario field
indicated that there was only one possible source code
combination available in ICD-9-CM for severe sepsis and
septic shock (995.92 + 785.52). The choice field pointed
you to both of these ICD-9-CM codes. It essentially said
that you must assign both of these codes together to paint
the complete picture of the patient’s condition. Unlike the
old ICD-9-CM codes, the new ICD-10 code for both severe
sepsis and septic shock is R65.21.
Using ICD-10-CM
You’ll use the Alphabetic Index and Tabular List to locate
codes in the ICD-10-CM. The main terms in the Alphabetic
Index appear in bold, with subterms indented directly beneath
the main term. In ICD-10-CM, each code begins with a letter
rather than a number, and the code descriptions become
much more specific than those found in ICD-9-CM. As you
begin to code using ICD-10-CM, you’ll see different sets of
instructions to guide you along the way.
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Basic Medical Coding Using ICD-10
ASSIGNMENT 3
Read through the following material in your study guide. Then,
read Chapter 2, pages 41–50, of your textbook, Step-by-Step
Medical Coding. When you’ve finished reading Chapter 2,
complete the Chapter Review on pages 51–54. You can check
your answers using the Answers section at the end of this
study guide.
ICD-10-CM codes are divided into sections, categories, subcategories, and subclassifications. Sections are three-digit
categories for conditions or related conditions. Categories are
three-character codes that represent one condition or disease. Subcategories are four-character subcategory codes that
are more specific than three-character codes. Subcategory
codes provide more information on the site, cause, or manifestation of the condition. Subclassifications provide even
greater specificity than subcategory codes, using five to seven
characters. Codes that can be expanded by adding more
characters should be coded to the fullest extent possible.
ICD-10-CM codes are listed in the Alphabetic Index and the
Tabular List. You would locate the codes in the Alphabetic
Index first, and then verify the codes in the Tabular List.
Codes and titles in the Tabular List are in bold font. Codes
not assigned as the first-listed diagnosis, as well as all exclusion notes, are listed in italicized font. Any codes listed in
italicized type are always assigned as secondary codes (that
is, after the primary diagnosis). For example, the phrase
“code first,” which appears in italicized font, instructs the
coder to assign another code first before assigning the code
in italics.
As you code, pay attention to the instructional notes and
conventions pertaining to diagnosis codes. These notes provide guidance in accurately assigning your codes. Review the
front matter of the ICD-10-CM manual to become familiar
with the instructional notes and conventions pertaining to
ICD-10-CM codes. Two commonly known conventions include
NEC (not elsewhere classifiable) and NOS (not otherwise
specified). The NEC convention indicates that a more specific
code for the condition is not available. The NOS convention
indicates that the information that you have, based on what’s
indicated in the medical record, means that you can’t assign
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a more specific code (although a more specific code may be
available). In this instance, you may need to query the physician for more information and see if you can obtain a more
specific diagnosis.
Additional conventions include brackets, parentheses, colons,
as well as essential and nonessential modifiers. You’ll find
brackets in the Tabular List enclosing synonyms, alternate
words, or explanatory phrases. Parentheses enclose
nonessential modifiers, also called supplementary words.
Nonessential modifiers don’t affect the code assignment, but
only clarify the diagnosis. For example, K56.7, the diagnosis
for inhibitory ileus, includes the term “inhibitory” in brackets.
The term “inhibitory” is a nonessential modifier. It’s not
essential for code assignment, but only further explains the
diagnosis. Colons appear after incomplete terms in the
Tabular List. Incomplete terms require at least one modifier
to assign the diagnosis code. Make special note of how the
terms and and with are used in ICD-10-CM. In ICD-10-CM,
the term and means and/or, while the term with means that
the code includes two conditions, and both conditions must
be present in order to assign the code. The note Includes provides additional examples that pertain to the content of the
category.
You’ll also see Excludes notes in ICD-10-CM. There are two
types of Excludes notes: Excludes1 and Excludes2. The
Excludes1 notes means not coded here and indicates that you
shouldn’t assign the excluded code along with the code being
referenced prior to the note. The note for code D61.82,
myelophthisis, in the Tabular List, includes Excludes1 notes
for several conditions that shouldn’t be coded along with code
D61.82. The Excludes2 note indicates not included here. This
means that the condition being excluded is a distinct condition that isn’t a part of the condition that it’s being excluded
from, so the patient may have both conditions simultaneously. If you see an Excludes2 note beneath a code, this
indicates that you can assign the code as well as the
Excludes2 code together. For example, in Chapter 1, the first
Excludes2 note indicates that the infectious and parasitic
disease doesn’t include the carrier of the suspected disease,
so it’s possible for both conditions to exist at the same time.
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Basic Medical Coding Using ICD-10
You may code some conditions that have an underlying etiology, along with multiple manifestations. This coding scenario
represents the etiology/manifestation paired code rule. You
will recognize this rule when you see a notation that indicates code first and use additional code. This tells you to
sequence the underlying condition first, and the code for the
manifestation second. The term code first appears at the
manifestation code. The term use additional code appears in
relation to the etiology code. You’ll also see the code title in
diseases classified elsewhere, which indicates that the code
is a manifestation code. Code D77, Other disorders of blood
and blood-forming organs in diseases classified elsewhere, is
an example of this convention.
The term code also indicates that you may need to assign
two codes in order to fully describe a condition. You would
sequence the two codes according to the reason for the
patient’s visit and the level of severity inherent in the condition. In the example referenced earlier for code D61.82, in
addition to the Excludes1 note, the Tabular List directs you
to also code the underlying disorder. Examples of underlying
disorders include malignant neoplasm of the breast (C50.-)
and tuberculosis (A15.-).
A code adjacent to a main term in the Alphabetic Index of
ICD-10-CM is a default code. The default code represents a
common condition associated with the main term, or represents the unspecified code for the condition. If a condition in
the medical record doesn’t include additional information
pertaining to the condition, assign the default code (that is,
unspecified).
Any codes with fewer than six characters require a placeholder only if a seventh character is needed. You’ll assign a
placeholder of X for any characters fewer than six. An example
is code S43.50, unspecified sprain of the acromioclavicular
joint, initial encounter, explained on page 49 of your text.
You’ll also encounter cross-references when assigning codes
in ICD-10-CM. Cross-references are possible alternatives or
synonyms for a term. Examples of cross-references include
see, see also, and see category.
Lesson 1
25

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