C79.82
BillableSecondary malignant neoplasm of genital organs
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C79.82 an HCC code?
Yes. C79.82 maps to Metastatic Cancer to Peritoneum and Other Specified Sites under the CMS-HCC V28 risk adjustment model (and Lymphoma and Other Cancers under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for C79.82
For C79.82 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed C79.82 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C79.82 is the ICD-10-CM diagnosis code for secondary malignant neoplasm of genital organs. Cancer that has spread to the genital organs (such as the uterus, prostate, or other reproductive structures) from a cancer that started elsewhere. C79.82 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of ill-defined, other secondary and unspecified sites (c76-c80).
Under the CMS-HCC V28 risk adjustment model, C79.82 maps to Metastatic Cancer to Peritoneum and Other Specified Sites (HCC 18) with a community, non-dual, aged base RAF weight of 0.368. Under the older CMS-HCC V24 model, C79.82 maps to Lymphoma and Other Cancers (HCC 10) with a community, non-dual, aged base RAF weight of 0.675. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
This is a general code for secondary cancer to genital organs; use more specific codes (C79.60-C79.63 for ovaries) when available. Because C79.82 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for C79.82 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
Clinical Significance
Secondary malignant neoplasm of genital organs captures metastatic cancer spreading to reproductive structures such as the uterus, cervix, vagina, vulva, prostate, or testes from a primary cancer elsewhere. This is distinct from primary genital organ cancers and indicates advanced-stage disease. Ovarian metastases have their own specific codes (C79.60-C79.63) and should not be coded here.
Documentation Requirements
- ✓Primary cancer site documented and coded separately
- ✓Specific genital organ involved — uterus, cervix, vagina, vulva, prostate, testis, etc.
- ✓Pathological confirmation distinguishing metastatic from primary genital organ cancer
- ✓Imaging confirmation of genital organ involvement
- ✓Treatment plan — surgical, radiation, systemic therapy