Certified Professional Coder (CPC) Quiz: Apply Icd10 Coding Guidelines
20 questions · exam conditions
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Apply Icd10 Coding GuidelinesQuestion 1 of 20

A patient is treated for an acute fracture of the right femur, initial encounter. What 7th character is used for an initial encounter for an active fracture?

D
G
S
A
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Certified Professional Coder (CPC) Quiz

Certified Professional Coder (CPC) Quiz: Apply Icd10 Coding Guidelines

Practice Apply Icd10 Coding Guidelines in Certified Professional Coder (CPC) with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Apply Icd10 Coding Guidelines, giving you a quick way to practice the rules, question types, and explanations that matter most for Certified Professional Coder (CPC).

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

A patient is treated for an acute fracture of the right femur, initial encounter. What 7th character is used for an initial encounter for an active fracture?

  1. D
  2. G
  3. S
  4. A (correct answer)
Explanation: ICD-10-CM uses 7th characters to identify the episode of care for injuries and certain other conditions. "A" designates the initial encounter — the active phase of treatment. "D" is for subsequent encounters (routine healing). "S" is for sequela (late effects). "G" may indicate delayed healing in some fracture code categories. Initial encounter = A.

Question 2

A physician documents "hypertensive heart disease with heart failure." ICD-10-CM provides a combination code for this condition. Which code category captures both hypertension and heart failure together?

  1. I10
  2. I11.0, with an additional code from the I50 series to specify the type of heart failure (correct answer)
  3. I11.9
  4. I13
Explanation: When hypertensive heart disease is accompanied by heart failure, ICD-10-CM code I11.0 (Hypertensive heart disease with heart failure) is used — the specific subcategory within I11 that captures the heart failure component. Per Official Guidelines, an additional code from category I50 is required to identify the type of heart failure. I10 captures hypertension alone without heart disease; I11.9 is hypertensive heart disease without heart failure; I13 is for hypertensive heart and chronic kidney disease combined.

Question 3

A patient is seen for a follow-up visit following treatment for a resolved urinary tract infection. No current infection is present. Which type of ICD-10-CM code is most appropriate as the first-listed diagnosis?

  1. The UTI code, since it was the original reason for treatment
  2. A personal history code (Z87 series)
  3. An aftercare code (Z09) (correct answer)
  4. A screening code (Z11 series)
Explanation: Z09 (encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm) is appropriate when a patient returns for follow-up after a condition has been resolved and no current condition exists. Personal history codes (Z87) are used to report past conditions that no longer exist and are not receiving treatment. Z09 specifically captures the follow-up visit context.

Question 4

A patient with a history of colon cancer, now in remission, is seen for a follow-up surveillance colonoscopy. No current malignancy is found. Which ICD-10-CM code is reported as the first-listed diagnosis?

  1. C18.9 — malignant neoplasm of colon, unspecified
  2. Z85.038 — personal history of other malignant neoplasm of large intestine
  3. Z12.11 — encounter for screening for malignant neoplasm of colon
  4. Z08 — encounter for follow-up examination after completed treatment for malignant neoplasm (correct answer)
Explanation: Z08 (encounter for follow-up examination after completed treatment for malignant neoplasm) is the first-listed diagnosis for a surveillance visit following cancer treatment when no current malignancy exists. The personal history code (Z85 series) is reported as an additional diagnosis. C18.9 is not reported since the cancer is in remission and not currently active.

Question 5

A patient is admitted with acute exacerbation of chronic obstructive pulmonary disease (COPD). The ICD-10-CM Tabular List provides a combination code for COPD with acute exacerbation. Which code is reported?

  1. J44.0
  2. J44.1 (correct answer)
  3. J44.9 with J44.1 as secondary
  4. J41.0
Explanation: ICD-10-CM J44.1 covers chronic obstructive pulmonary disease with acute exacerbation. This is a combination code that captures both the chronic condition and the acute exacerbation. J44.0 covers COPD with acute lower respiratory infection; J44.9 is COPD, unspecified. When a combination code is available and the documentation supports it, it should be used instead of multiple codes.

Question 6

A patient is seen during a subsequent encounter for a healing fracture with routine healing. Which 7th character is assigned?

  1. A
  2. D (correct answer)
  3. G
  4. S
Explanation: The 7th character "D" (subsequent encounter) is used for encounters after the active phase of treatment, when the patient is receiving routine care during healing and recovery. "A" is for initial encounter (active treatment); "G" is for subsequent encounter with delayed healing (in some fracture categories); "S" is for sequela.

Question 7

The Tabular List shows an Excludes2 note beneath a code. A patient has both conditions listed. Can both codes be reported?

  1. No — Excludes2 means the conditions are mutually exclusive
  2. No — only the primary condition is reported; the secondary is captured by the Excludes2 note
  3. Yes — Excludes2 indicates the excluded condition is not included in the code but may be reported separately when both conditions coexist (correct answer)
  4. Yes, but only with modifier -59 to distinguish the two diagnoses
Explanation: An Excludes2 note means the excluded condition is not part of the condition represented by the code, but a patient may have both conditions simultaneously. When both conditions are present and documented, both codes may be reported. This is the key distinction from Excludes1, where simultaneous reporting is never permitted.

Question 8

A patient is being treated for a condition the physician documents as "impending respiratory failure." ICD-10-CM guidelines address how to code impending or threatened conditions. What is the correct approach?

  1. Code the condition as if it exists, since the physician believes it is imminent
  2. Report the signs and symptoms that led to the "impending" documentation
  3. Refer to the ICD-10-CM Alphabetic Index — if the condition is indexed as "impending," use that code; if not, report the current signs and symptoms (correct answer)
  4. Report the condition using the "threatened" code category
Explanation: The ICD-10-CM Official Guidelines state that if the Alphabetic Index provides a subterm for "impending" or "threatened," that entry should be used. If no such entry exists, the condition is coded based on the current signs and symptoms that are actually present. The condition is not coded as if it exists unless it is specifically listed as such in the Index.

Question 9

A patient is seen for a condition that is documented as "possible pneumonia." This is an inpatient admission, and the condition is still being worked up at discharge. How is this coded for inpatient purposes?

  1. Only the signs and symptoms are coded — possible conditions are never coded as confirmed
  2. A screening code is used until the diagnosis is confirmed
  3. The possible pneumonia is coded as if confirmed, per inpatient coding guidelines (correct answer)
  4. The possible condition is reported with a "probable" 7th character
Explanation: ICD-10-CM Official Guidelines for inpatient coding (Section II) permit coding of "possible," "probable," "suspected," or "likely" diagnoses as if established when they remain under investigation at the time of discharge. This is the opposite of outpatient guidelines, where only confirmed diagnoses or symptoms are reported. For the inpatient setting, "possible pneumonia" is coded as pneumonia.

Question 10

A patient sustains multiple injuries in a car accident: a closed femur fracture and a laceration of the spleen. Both conditions are treated during the same admission. How many ICD-10-CM codes are required?

  1. One combination code captures both injuries
  2. Two codes — one for each injury, sequencing determined by the most severe or most resource-intensive condition (correct answer)
  3. One code — the more severe injury is reported; minor injuries are bundled
  4. Two codes — the fracture is always listed first for orthopedic admissions
Explanation: When a patient sustains multiple injuries, each injury is coded separately. ICD-10-CM does not have combination codes for multiple traumatic injuries across different body systems. The most severe injury or the one chiefly responsible for the admission is sequenced first. Both the femur fracture and the splenic laceration require their own specific ICD-10-CM codes.

Question 11

A patient is treated for a deep vein thrombosis (DVT) of the left femoral vein. ICD-10-CM requires specificity for DVT coding. Which element is NOT required for accurate DVT code selection in ICD-10-CM?

  1. Laterality (left vs. right)
  2. Vessel involved (femoral, popliteal, tibial, etc.)
  3. Whether the DVT is acute or chronic
  4. The patient's age at onset of DVT (correct answer)
Explanation: ICD-10-CM DVT codes require: laterality (left/right/bilateral), the specific vessel involved (e.g., femoral, popliteal), and the acuity (acute vs. chronic). Patient age is not an axis of classification in DVT code selection. Accurate reporting requires all three documented clinical elements to avoid use of an unspecified code.

Question 12

A patient is diagnosed with cellulitis of the right lower leg. ICD-10-CM requires laterality in code selection. Which code correctly identifies this condition?

  1. L03.115 (correct answer)
  2. L03.116
  3. L03.119
  4. L03.90
Explanation: ICD-10-CM L03.115 covers cellulitis of the right lower limb. L03.116 is cellulitis of the left lower limb; L03.119 is cellulitis of unspecified lower limb. When laterality is documented, the specific laterality code must be selected. Reporting an unspecified code (L03.119) when the side is documented constitutes incomplete coding.

Question 13

The ICD-10-CM category "NEC" appears in the Tabular List. What does NEC mean, and how is it different from NOS?

  1. NEC means "not elsewhere classified" — the condition exists but there is no more specific code available; NOS means "not otherwise specified" — the condition is unspecified (correct answer)
  2. NEC and NOS are interchangeable terms in ICD-10-CM
  3. NEC means the code has been deleted; NOS means the code is under revision
  4. NEC applies only to injury codes; NOS applies only to disease codes
Explanation: NEC (Not Elsewhere Classified) means there is no more specific code in ICD-10-CM for the documented condition, even though the documentation is specific. "NOS" (Not Otherwise Specified) means the documentation lacks specificity. NEC = specific condition, no specific code available. NOS = unspecified condition. Understanding this distinction guides accurate code assignment.

Question 14

The ICD-10-CM Tabular List shows an Excludes1 note at a code category. What does an Excludes1 note mean?

  1. The excluded condition may be coded together with the listed code if both are present
  2. The excluded code represents a condition not included here, but it may be used together when both conditions exist simultaneously
  3. The excluded code can never be reported at the same time as the code with the Excludes1 note (correct answer)
  4. The excluded code is an alternative code that should be used instead when applicable
Explanation: An Excludes1 note is a "pure" exclusion — the two conditions cannot occur together, so the codes cannot be reported simultaneously. If the Excludes1 code is present, it means the excluded condition cannot coexist with the code it is listed under. This is different from Excludes2, which indicates the excluded condition is not included in the code but may be coded together when both are present.

Question 15

A coder encounters the ICD-10-CM notation "Code also." What does this instruction require?

  1. The coder must always sequence the "code also" code first
  2. The instruction is optional — the additional code is reported only if the coder deems it clinically relevant
  3. Both codes should be reported, with sequencing determined by the reason for the encounter (correct answer)
  4. The "code also" code replaces the primary code
Explanation: The "code also" note in ICD-10-CM instructs that a second code should be reported when the condition is present. Unlike "code first" (which mandates sequencing), "code also" does not specify a sequencing requirement — the order is determined by the circumstances of the encounter and the applicable sequencing guidelines.

Question 16

A patient is diagnosed with acute and chronic sinusitis affecting the same sinus. ICD-10-CM provides a combination code for acute-on-chronic sinusitis. What is the correct coding approach?

  1. Report only the acute sinusitis code
  2. Report only the chronic sinusitis code
  3. Report both the acute and chronic codes with modifier -25
  4. Report the combination code for acute and chronic sinusitis (correct answer)
Explanation: When ICD-10-CM provides a combination code that captures both the acute and chronic components of a condition, the combination code should be reported. Reporting separate acute and chronic codes when a single combination code exists is incorrect coding. Coders should always check the Alphabetic Index and Tabular List for combination codes before assigning multiple codes.

Question 17

A patient presents with chest pain. After a complete workup, the physician's final documented diagnosis is "chest pain, etiology undetermined." For this outpatient encounter, which code is reported?

  1. Chest pain (R07.9 or specific subcategory) (correct answer)
  2. The most likely diagnosis based on the test results
  3. Abnormal cardiac test results
  4. Encounter for diagnostic evaluation
Explanation: For outpatient encounters, signs and symptoms are coded when no definitive diagnosis has been confirmed. The physician's documentation of "chest pain, etiology undetermined" means no confirmed diagnosis exists, and the symptom code (R07 series for chest pain) is the first-listed diagnosis. "Probable," "possible," or "undetermined" diagnoses are not coded as confirmed in the outpatient setting.

Question 18

A patient is seen for management of obesity. The physician documents a BMI of 38.5. Which ICD-10-CM coding convention applies to BMI codes?

  1. BMI codes are always the first-listed diagnosis for obesity encounters
  2. BMI codes are never reported in the outpatient setting
  3. BMI codes replace the obesity diagnosis code when a numeric value is documented
  4. BMI codes (Z68 series) are reported as additional codes and require a documented BMI from the physician or clinical staff (correct answer)
Explanation: ICD-10-CM Z68 codes (BMI) are reported as additional codes — they are never the first-listed diagnosis. Per ICD-10-CM guidelines, BMI codes may be reported based on documentation by any clinician (not just the provider), such as a nurse or medical assistant. The obesity diagnosis code (E66 series) is always the primary code, with Z68 as a supplementary code.

Question 19

The ICD-10-CM Alphabetic Index lists a main term with subterms. A coder finds the main term but cannot locate the specific subterm for the documented condition. What is the correct next step?

  1. Use the unspecified code listed under the main term
  2. Proceed directly to the Tabular List and browse for the correct code
  3. Check cross-references, synonyms, or "see also" notes in the Alphabetic Index before proceeding to the Tabular List (correct answer)
  4. Report the closest matching subterm code without verifying in the Tabular List
Explanation: The correct ICD-10-CM coding process requires reviewing the Alphabetic Index first, then verifying in the Tabular List. If the specific subterm is not found, the coder should check cross-references ("see," "see also"), synonyms, and eponyms in the Index before proceeding to the Tabular List. A code should never be assigned based solely on the Index or the Tabular List alone — both must be used.

Question 20

The ICD-10-CM Official Guidelines include four sections. Which section addresses general coding guidelines applicable to all settings?

  1. Section I (correct answer)
  2. Section II
  3. Section III
  4. Section IV
Explanation: ICD-10-CM Official Guidelines are divided into four sections: Section I covers general coding guidelines and chapter-specific guidelines applicable across all settings. Section II addresses selection of the principal diagnosis for inpatient admissions. Section III addresses reporting additional diagnoses for inpatient settings. Section IV addresses diagnostic coding and reporting for outpatient services.