O9A.119
BillableMalignant neoplasm complicating pregnancy, unspecified trimester
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is O9A.119 an HCC code?
No. O9A.119 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
O9A.119 is the ICD-10-CM diagnosis code for malignant neoplasm complicating pregnancy, unspecified trimester. A pregnant woman has been diagnosed with cancer at an unspecified point during her pregnancy. This code indicates the cancer is complicating her pregnancy but doesn't specify which trimester. O9A.119 sits in the ICD-10-CM chapter for pregnancy, childbirth and the puerperium (o00-o9a), within the section covering other obstetric conditions, not elsewhere classified (o94-o9a).
O9A.119 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use this code only when the trimester is truly unknown; if trimester can be determined, use O9A.111, O9A.112, or O9A.113 instead.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O9A.119 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the trimester is truly unknown; if trimester can be determined, use O9A.111, O9A.112, or O9A.113 instead
- •This code should be paired with the specific malignant neoplasm code to identify the type and location of cancer