How to Study ICD-10-CM Guidelines for the CPC Exam: A Simple Step-by-Step Approach!

If you are preparing for the CPC® exam, you may have already realized that learning ICD-10-CM is not simply about finding diagnosis codes.

You also need to understand the ICD-10-CM coding guidelines that tell you how and when those codes should be assigned.

For many beginners, this is where things start to feel overwhelming.

Terms like Excludes1, Excludes2, Code First, Use Additional Code, combination codes, sequela, and laterality can quickly become confusing when you try to study everything at once.

I experienced the same thing during my own CPC exam preparation.

What helped me most was changing the way I studied. Instead of trying to memorize page after page of guidelines, I started breaking them into smaller concepts, connecting each rule with examples, and reviewing them regularly.

If you are struggling with ICD-10-CM guidelines for the CPC exam, here is a simple step-by-step approach that can make your preparation much more manageable.

Why Are ICD-10-CM Guidelines Important for the CPC Exam?

The CPC exam tests more than your ability to locate a diagnosis in the code book.

You also need to know how to apply coding guidelines correctly.

For example, you may find what appears to be the correct ICD-10-CM code in the Alphabetic Index, but before reporting it you still need to verify the code in the Tabular List and follow any instructional notes that apply.

You may also need to decide:

Whether an additional code is required
Which diagnosis should be sequenced first
Whether two conditions are represented by a combination code
Whether a symptom should be coded separately
Whether laterality is required
Whether the documentation supports a more specific code

These decisions depend on understanding the guidelines rather than simply memorizing code numbers.

That is why building a strong foundation in ICD-10-CM guidelines for CPC exam preparation is so important.

Step 1: Start With ICD-10-CM Coding Conventions

Before jumping into disease-specific chapters, begin with the basic coding conventions.

These are essentially the language of the ICD-10-CM code book.

Make sure you understand concepts such as:

Alphabetic Index and Tabular List
Categories and subcategories
NEC and NOS
Includes notes
Excludes1 and Excludes2 notes
Code First
Use Additional Code
Code Also
Placeholder “X”
Seventh characters
“And”
“With”
“See”
“See Also”

These concepts appear throughout ICD-10-CM.

Once you understand them, many chapter-specific guidelines become much easier to follow.

A Simple Example

Suppose you locate a diagnosis in the Alphabetic Index.

Your work is not finished.

You should verify the code in the Tabular List and review any instructional notes associated with that category or code.

A small note such as Code First or Use Additional Code can completely change how the case should be reported.

QUICK VISUAL: Basic ICD-10-CM Coding Flow

Find the diagnosis in the Alphabetic Index
↓
Locate the tentative code
↓
Verify the code in the Tabular List
↓
Read all instructional notes
↓
Check laterality and required specificity
↓
Assign the final code

Study Tip: Never stop after finding a code in the Alphabetic Index. Always verify it in the Tabular List.

Step 2: Learn the General Coding Guidelines

Once you are comfortable with coding conventions, move to the general ICD-10-CM coding guidelines.

These rules apply across many different chapters and frequently affect real coding scenarios.

Important concepts include:

Coding to the highest level of specificity
Signs and symptoms
Conditions integral to a disease process
Acute and chronic conditions
Combination codes
Sequela
Laterality
Multiple coding for a single condition
Impending or threatened conditions
Unspecified codes
Complications of care

Instead of trying to memorize an entire section at once, study one concept at a time.

For example, spend one study session learning combination codes. Then practice two or three examples where a single code represents more than one diagnosis or a diagnosis with an associated complication.

The next day, move to another concept.

This makes the information much easier to retain.

Step 3: Understand the Rule Before Trying to Memorize It

One of the biggest mistakes beginners make while studying ICD-10-CM guidelines is trying to memorize the exact wording without understanding what the rule actually means.

That may work temporarily, but it becomes difficult when the same guideline appears inside a case-based exam question.

Instead, ask yourself three questions whenever you learn a new rule:

The 3-Question Method

Ask yourself	Why it matters
What does this guideline mean?	Helps you understand the concept
When would I use it?	Connects the rule with coding situations
Can I recognize it in a case?	Prepares you for CPC-style questions

For example, rather than simply memorizing the definition of a combination code, understand that sometimes ICD-10-CM provides one code that captures multiple clinical elements, making separate coding unnecessary.

Once the concept makes sense, remembering the guideline becomes much easier.

Step 4: Connect Every Guideline With an Example

Examples are one of the best ways to turn coding theory into practical understanding.

Suppose you are studying acute and chronic conditions.

Instead of reading the guideline repeatedly, create a small scenario and practice locating the appropriate codes.

You can use the same method for:

Laterality
Sequela
Combination codes
Excludes notes
Signs and symptoms
Code First instructions
Use Additional Code instructions

Your goal should be to move from:

“I remember reading this guideline.”

to:

“I know how to use this guideline in a coding case.”

That difference becomes especially important during CPC-style questions.

QUICK VISUAL

Read the Rule → Understand the Meaning → See an Example → Code a Case → Review Your Mistake

This simple cycle is much more effective than repeatedly reading the same guideline.

Step 5: Study Chapter-Specific Guidelines Separately

After you understand the conventions and general coding guidelines, begin reviewing chapter-specific rules.

Some chapters contain much more detailed guidance than others.

For example, you will encounter important chapter-specific rules related to:

Infectious diseases
Neoplasms
Diabetes
Circulatory conditions
Pregnancy
Injuries and fractures
External causes
Z codes

Do not try to study all chapter guidelines together.

A better approach is to choose one chapter at a time.

Sample 5-Day Study Plan

Day	Study focus
Day 1	Review diabetes guidelines
Day 2	Practice diabetes coding cases
Day 3	Quick diabetes revision + start neoplasms
Day 4	Practice neoplasm coding and sequencing
Day 5	Review infectious disease guidelines

This creates a more structured learning process and makes revision less overwhelming.

Step 6: Pay Special Attention to Sequencing Rules

Knowing the correct codes is only part of the job.

Many coding questions also test whether you know which code should be reported first.

Watch carefully for instructions such as:

Code First
Use Additional Code
Code Also
Manifestation coding
Etiology/manifestation conventions

You should also practice chapter-specific sequencing rules for conditions such as neoplasms, sepsis, diabetes complications, and other multi-code scenarios.

A good habit is to ask:

Do I only need to identify the correct codes, or does the order matter too?

That single question can prevent many mistakes.

QUICK VISUAL: 4 Instructional Notes Every CPC Student Should Recognize

Instruction	Simple way to remember it
Excludes1	The two conditions generally should not be coded together
Excludes2	The excluded condition is not part of this code, but both may be coded when appropriate
Code First	Another underlying condition must be sequenced before this code
Use Additional Code	Another code may be needed to provide more information

These four instructions appear frequently throughout ICD-10-CM, so becoming comfortable with them can make code selection much easier.

Step 7: Use Your ICD-10-CM Book Actively

Reading the guidelines without using your code book can make studying feel very theoretical.

Keep your ICD-10-CM book open while studying.

Whenever you learn a guideline:

Find a related diagnosis in the Alphabetic Index.
Follow it to the Tabular List.
Look for instructional notes.
Check required specificity.
Review related codes.

This helps you understand how the written guidelines actually appear inside the coding manual.

Over time, you also become more comfortable navigating the book quickly.

That familiarity can be valuable during the CPC exam, where both accuracy and time management matter.

Step 8: Create Short Revision Notes Instead of Rewriting Everything

You do not need to copy the entire official guideline into your notebook.

Instead, create short revision notes.

For example:

ICD-10-CM Quick Revision Box

Excludes1
Think: generally not coded together.

Excludes2
Think: both conditions may be coded when appropriate.

Code First
Think: the underlying condition goes before this code.

Use Additional Code
Think: another code may be required for extra information.

Combination Code
Think: one code may describe multiple elements of a condition.

Laterality
Think: always check whether the code requires right, left or bilateral information.

These short reminders make revision much faster.

You can always return to the official guidelines when you need the complete wording.

Step 9: Practice Questions Immediately After Studying

Do not wait until you finish the entire ICD-10-CM book before starting practice questions.

Practice while you learn.

If you study five guidelines today, answer a few questions related to those same concepts.

This helps you identify whether you truly understand the material or are simply familiar with the wording.

When you answer incorrectly, do not just check the right answer.

Ask yourself:

Which guideline did I miss?
Did I overlook an instructional note?
Did I choose an unspecified code unnecessarily?
Did I sequence the diagnoses incorrectly?
Did I forget to verify the code in the Tabular List?

Mistakes can become some of your most useful study tools.

Step 10: Use Repetition for Long-Term Retention

ICD-10-CM guidelines are difficult to learn in one sitting.

Regular revision works much better.

Simple Revision Schedule

First review: Same day
↓
Second review: 2–3 days later
↓
Third review: One week later
↓
Final review: During your CPC exam revision period

Quick, repeated exposure helps the concepts become familiar without requiring hours of rereading.

A Simple ICD-10-CM Study Order for Beginners

If you are unsure where to begin, follow this sequence:

ICD-10-CM STUDY ROADMAP

1. Coding Conventions
↓
2. General Coding Guidelines
↓
3. Chapter-Specific Guidelines
↓
4. Coding Examples
↓
5. CPC-Style Practice Questions
↓
6. Review Weak Areas
↓
7. Quick Final Revision

Following a clear order prevents you from jumping randomly between topics and can make CPC exam preparation feel much more manageable.

Need a Simpler Way to Review ICD-10-CM Guidelines?

If you find the official guidelines difficult to study directly, I have created an ICD-10-CM Guidelines Simplified Bundle – Parts 1 & 2 for CPC® aspirants, beginner medical coders, and students.

The bundle simplifies important coding concepts with:

Beginner-friendly explanations
Practical coding examples
Visual learning aids
Quick-reference cheat sheets
Memory tips
Revision questions

It covers both ICD-10-CM coding conventions and general coding guidelines, giving you a structured resource to use alongside the official guidelines.

Explore the ICD-10-CM Guidelines Simplified Bundle – Parts 1 & 2 here:
https://payhip.com/b/fI5T8

My goal with these guides is not to replace the official ICD-10-CM guidelines. Instead, they are designed to help you understand the concepts more easily, so reading and applying the official guidance becomes less overwhelming.

Common Mistakes to Avoid While Studying ICD-10-CM Guidelines

1. Trying to Memorize Everything

Understanding the logic behind a guideline is usually much more useful than memorizing every sentence.

2. Ignoring the Tabular List

Never rely on the Alphabetic Index alone.

Always verify the code and applicable instructional notes in the Tabular List.

3. Studying Without Examples

Guidelines become much easier to remember when connected with realistic coding scenarios.

4. Ignoring Sequencing

Correct code selection does not automatically mean correct coding.

Sequence matters in many situations.

5. Using Outdated Resources

ICD-10-CM is updated annually.

Always make sure you are using the guidelines and code set applicable to the relevant coding year.

Frequently Asked Questions About ICD-10-CM Guidelines for the CPC Exam

1. Do I Need to Memorize All ICD-10-CM Guidelines for the CPC Exam?

Rather than trying to memorize every sentence, focus on understanding the major coding conventions, general guidelines, commonly used chapter-specific rules, and how to apply them in coding scenarios.

Understanding the logic behind the rule is usually more useful than memorizing the exact wording.