C57.4 Malignant neoplasm of uterine adnexa, unspecified

Billable ICD-10-CM code, FY2026.

Risk adjustment (HCC)

• CMS-HCC V28: HCC 22 — Bladder, Colorectal, and Other Cancers
• CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
• RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
• ESRD V24: HCC 10

MS-DRG index

Defines the logic of DRG(s) 736-741 in MDC 13.

Approximate ICD-9-CM (GEMs)

• 183.9 Malignant neoplasm of uterine adnexa, unspecified site (approximate)

Nearby codes

• C57.2 Malignant neoplasm of round ligament
• C57.20 Malignant neoplasm of unspecified round ligament
• C57.21 Malignant neoplasm of right round ligament
• C57.22 Malignant neoplasm of left round ligament
• C57.3 Malignant neoplasm of parametrium
• C57.4 Malignant neoplasm of uterine adnexa, unspecified (this code)
• C57.7 Malignant neoplasm of other specified female genital organs
• C57.8 Malignant neoplasm of overlapping sites of female genital organs
• C57.9 Malignant neoplasm of female genital organ, unspecified