C23 Malignant neoplasm of gallbladder

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Risk adjustment (HCC)

• CMS-HCC V28: HCC 20 — Lung and Other Severe Cancers
• CMS-HCC V22: HCC 9 — Lung and Other Severe Cancers
• RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
• ESRD V24: HCC 9

MS-DRG index

Defines the logic of DRG(s) 435-437 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 156.0 Malignant neoplasm of gallbladder

Nearby codes

• C23 Malignant neoplasm of gallbladder (this code)