Answer Rationales for ICD-10-CM Coding: Chapter 11 - Diseases of the Digestive System

Question 1

Rationale:

ICD-10-CM Alphabetic: Hernia > Inguinal > Unilateral > Recurrent > K40.91.

Verify code selection in the Tabular List.

Question 2

Rationale:

In the ICD-10-CM Alphabetic Index: Human > Immunodeficiency virus (HIV) disease (infection)> B20.

Because Kaposi’s sarcoma is neoplastic lesions caused by an opportunistic infection common in HIV and it is documented as related to the patient’s HIV status, it is coded as AIDS instead of asymptomatic HIV (Z21). 

ICD-10-CM Alphabetic Index: Kaposi’s > sarcoma > skin (multiple sites) > C46.0.

ICD-10-CM Alphabetic Index: Leukoplakia > lip > K13.21.

ICD-10-CM Alphabetic Index: Splenomegaly > R16.1.

Verify code selection in the Tabular List.

According to ICD-10-CM guideline I.C.1.a.2.a, if a patient is admitted for an HIV-related condition, the principal diagnosis should be B20, followed by additional diagnosis codes for all reported HIV-related conditions.

Question 3

Rationale:

ICD-10-CM Alphabetic Index: Choledocholithiasis (common duct) (hepatic duct) — “see” Calculus, bile duct

ICD-10-CM Alphabetic Index: Calculus > Bile Duct > With > Cholecystitis > Acute > With > Chronic cholecystitis > K80.46.

Verify codes selection in the Tabular List.

Question 4

Rationale:

ICD-10-CM Alphabetic Index: Diverticulitis > Intestine > Large > With > Small Intestine > With > Perforation/Abscess > With > Bleeding > K57.41.

Verify codes selection in the Tabular List.

Question 5

Rationale:

ICD-10-CM Alphabetic Index: Obstruction > bowel, “see” Obstruction Intestine

Obstruction > Intestine > Adhesions > Complete > K56.52.

Verify codes selection in the Tabular List.

Question 6

Rationale:

ICD-10-CM Alphabetic Index: Obstruction > bowel, “see” Obstruction Intestine

Obstruction > Intestine > Partial > K56.600.

Verify codes selection in the Tabular List. 

Question 7

Rationale:

ICD-10-CM Alphabetic Index: Hernia > Parastomal > K43.5.

ICD-10-CM Alphabetic Index: Adhesions > bowel, “see” Adhesions peritoneum > Peritoneum > K66.0.

Verify codes selection in the Tabular List.

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