C62.00
BillableMalignant neoplasm of unspecified undescended testis
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C62.00 an HCC code?
Yes. C62.00 maps to Melanoma and Other Skin Cancers under the CMS-HCC V28 risk adjustment model (and Breast, Prostate, and Other Cancers and Tumors 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 C62.00
For C62.00to 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 C62.00 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C62.00 is the ICD-10-CM diagnosis code for malignant neoplasm of unspecified undescended testis. Cancer of a testis that has not descended into the scrotum (cryptorchid testis), where the specific side is not specified. This malignant tumor occurs in an undescended testis. C62.00 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of male genital organs (c60-c63).
Under the CMS-HCC V28 risk adjustment model, C62.00 maps to Melanoma and Other Skin Cancers (HCC 23) with a community, non-dual, aged base RAF weight of 0.251. Under the older CMS-HCC V24 model, C62.00 maps to Breast, Prostate, and Other Cancers and Tumors (HCC 12) with a community, non-dual, aged base RAF weight of 0.150. 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.
Confirm documentation indicates the testis is undescended and that laterality cannot be determined. Because C62.00 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 C62.00 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
Clinical Significance
Cancer of an undescended testis carries significantly higher risk than cancer in a descended testis, with cryptorchidism being a major risk factor for testicular malignancy. The undescended status affects both treatment approach and prognosis. Using the unspecified laterality code indicates missing documentation that should be queried.
Documentation Requirements
- ✓Documentation confirming the testis is undescended (cryptorchid)
- ✓Laterality — query provider if not documented
- ✓Histologic type (seminoma vs. nonseminomatous germ cell tumor)
- ✓Staging (TNM) and serum tumor markers (AFP, beta-hCG, LDH)
- ✓Location of undescended testis (inguinal, abdominal, other)
- ✓Treatment plan
Commonly Confused Codes
- •C62.01/C62.02 — Laterality-specific undescended testis cancer; always preferred when side is documented
- •C62.10-C62.12 — Descended testis cancer; verify descent status carefully
- •C62.90-C62.92 — Unspecified descent status; use C62.0x when undescended status is confirmed
- •Q53.10-Q53.20 — Undescended testis without malignancy; do not confuse with cancer