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C62.12 ICD-10-CM Code: Malignant neoplasm of descended left testis

C62.12 maps to CMS-HCC V28 23. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupC62.12

FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of male genital organs (C60-C63)

C62.12

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Malignant neoplasm of descended left testis

Cancer that has developed in the left testicle after it has descended normally into the scrotum.

Buddy the Bee presenting code insight

Buddy Insight

Left descended testicular cancer specifies both normal scrotal position and left-sided involvement.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 23

Code-level coefficient reference

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

HCC 013

Code-level coefficient reference

ESRD/PACE

HCC 12

Code-level coefficient reference

RXHCC

HCC 22

Code-level coefficient reference

Code Book Path

Official
C62Malignant neoplasm of testisC62.1Malignant neoplasm of descended testisC62.12Malignant neoplasm of descended left testis

Inclusion Terms

Official
  • Malignant neoplasm of scrotal testisInherited from C62.1

Excludes 2

Official

No Excludes 2 notes are included in this display for C62.12. Check the code and parent instructions in the Code Book.

Related Codes

Official
C62.10Malignant neoplasm of unspecified descended testisC62.11Malignant neoplasm of descended right testis

Includes

Official
  • malignant neoplasm of skin of male genital organsInherited from C60-C63

Excludes 1

Official

No Excludes 1 notes are included in this display for C62.12. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for C62.12. Check the code and parent instructions in the Code Book.

Use Additional

Official
  • code to identify any functional activityInherited from C62

Code Also

Official

No Code Also instructions are included in this display for C62.12. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Documentation of left testicular malignancy in a normally descended testis
Histologic type and differentiation
Serum tumor markers
TNM staging

MEAT Support

HCC Buddy guidance
Documentation of left testicular malignancy in a normally descended testis
Histologic type and differentiation
Serum tumor markers
TNM staging

Audit Caution

HCC Buddy guidance
Selecting wrong laterality — always verify left vs. right against operative documentation
Using a less specific code when both descent status and laterality are available
Coding active cancer when patient completed treatment and has no evidence of disease — use Z85.47

Common Mistakes

HCC Buddy guidance
C62.02 — Left undescended testis cancer; verify descent status
C62.92 — Left testis unspecified descent; C62.12 is more specific
C62.11 — Right descended testis; confirm laterality
C62.10 — Unspecified descended testis; use C62.12 when left is documented

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is C62.12 an HCC code?

Yes. C62.12 (Malignant neoplasm of descended left testis) maps to HCC 23, Prostate, Breast, and Other Cancers and Tumors under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.186. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: C62.12 is billable and maps to V28 HCC 23, Prostate, Breast, and Other Cancers and Tumors. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
C62.12
Description
Malignant neoplasm of descended left testis
HCC (V28)
HCC 23 — Prostate, Breast, and Other Cancers and Tumors
RAF reference coefficient
0.186
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 23, Prostate, Breast, and Other Cancers and Tumors
0.186
ESRDHCC 12, Breast/Prostate/and Other Cancers and Tumors
Not separately weighted
RxHCCHCC 22, Prostate, Breast, Bladder, and Other Cancers and Tumors
Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work C62.12 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for C62.12

For C62.12, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

  • 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

Coder workflow notes

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What This Code Means

C62.12 is the ICD-10-CM diagnosis code for malignant neoplasm of descended left testis. Cancer that has developed in the left testicle after it has descended normally into the scrotum. C62.12 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, C62.12 maps to Prostate, Breast, and Other Cancers and Tumors (HCC 23) with a source-labeled community, non-dual, aged reference coefficient of 0.186. No V24 mapping is shown for C62.12; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

The fifth character '2' specifies left side; ensure laterality is documented in the medical record. For C62.12, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. 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, source-labeled coefficient references, and MEAT documentation criteria for C62.12 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •The fifth character '2' specifies left side; ensure laterality is documented in the medical record
  • •The fourth character '1' indicates descended testis; verify descent status is confirmed before coding

Clinical Significance

Left descended testicular cancer specifies both normal scrotal position and left-sided involvement. The left testis is anatomically positioned slightly lower and has a longer spermatic cord, which can influence surgical approach. This code provides maximum coding specificity for cancer registry and risk adjustment purposes.

Documentation Requirements

  • ✓Documentation of left testicular malignancy in a normally descended testis
  • ✓Histologic type and differentiation
  • ✓Serum tumor markers
  • ✓TNM staging
  • ✓Treatment plan
  • ✓Contralateral testis assessment

Commonly Confused Codes

  • •C62.02: Left undescended testis cancer; verify descent status
  • •C62.92: Left testis unspecified descent; C62.12 is more specific
  • •C62.11: Right descended testis; confirm laterality
  • •C62.10: Unspecified descended testis; use C62.12 when left is documented

Child Codes

C62.10Malignant neoplasm of unspecified descended testis
HCC 23
C62.11Malignant neoplasm of descended right testis
HCC 23
C62.12Malignant neoplasm of descended left testis
HCC 23

Code Hierarchy

└C62Malignant neoplasm of testis└C62.1Malignant neoplasm of descended testis└C62.12Malignant neoplasm of descended left testis
└C62.12Malignant neoplasm of descended left testis

For C62.12, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

C62.12 maps to CMS-HCC V28 category 23, Prostate, Breast, and Other Cancers and Tumors. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for C62.12. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

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