K73.1 Chronic lobular hepatitis, not elsewhere classified

Billable ICD-10-CM code, FY2026.

Applies from K73 Chronic hepatitis, not elsewhere classified

Excludes1 (never code together)

• alcoholic hepatitis (chronic) (K70.1-)
• drug-induced hepatitis (chronic) (K71.-)
• granulomatous hepatitis (chronic) NEC (K75.3)
• reactive, nonspecific hepatitis (chronic) (K75.2)
• viral hepatitis (chronic) (B15-B19)

Use additional code

• code, if applicable, for ascites (R18.8)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 65 — Chronic Hepatitis
• CMS-HCC V22: HCC 29 — Chronic Hepatitis
• ESRD V24: HCC 29

MS-DRG index

Defines the logic of DRG(s) 441-443 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 571.49 Other chronic hepatitis (approximate)

Code annotations containing back-references to K73.1

Back-references to K73

• Type 1 Excludes: K75.2 Nonspecific reactive hepatitis ("chronic hepatitis NEC (K73.-)")
• Type 1 Excludes: K75.3 Granulomatous hepatitis, not elsewhere classified ("chronic hepatitis NEC (K73.-)")
• Type 1 Excludes: K75.9 Inflammatory liver disease, unspecified ("chronic hepatitis NEC (K73.-)")

Diagnosis Index entries for K73.1

• Hepatitis › chronic › lobular NEC

Nearby codes

• K73 Chronic hepatitis, not elsewhere classified
• K73.0 Chronic persistent hepatitis, not elsewhere classified
• K73.1 Chronic lobular hepatitis, not elsewhere classified (this code)
• K73.2 Chronic active hepatitis, not elsewhere classified
• K73.8 Other chronic hepatitis, not elsewhere classified
• K73.9 Chronic hepatitis, unspecified