2027 ICD-10-CM Diagnosis Code C62.12Malignant neoplasm of descended left testis
ICD-10-CM Codes›C00–D49›C60-C63›C62
- Billable — Valid for Submission
- Risk Adjusts — HCC 23
- Chronic Condition
C62.12 is a billable ICD-10-CM diagnosis code for malignant neoplasm of descended left testis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 715 through 716, 722 through 724. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Male reproductive system cancers - testis.
For Medicare Advantage risk adjustment, C62.12 maps to CMS-HCC Category 23 (Prostate, Breast, and Other Cancers and Tumors) under the V28 model, adding a risk factor of about 0.186 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
C62.12 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral primary malignant neoplasm of testes
- Bilateral primary nonseminomatous germ cell neoplasm of descended testes
- Bilateral primary seminoma of descended testes
- Non-seminomatous germ cell neoplasm of testis
- Primary malignant neoplasm of descended testis
- Primary malignant neoplasm of left descended testis
- Primary malignant neoplasm of right descended testis
- Primary nonseminomatous germ cell neoplasm of descended testis
- Primary nonseminomatous germ cell neoplasm of left descended testis
- Primary nonseminomatous germ cell neoplasm of right descended testis
- Primary non-seminomatous germ cell neoplasm of testis
- Primary seminoma of descended testis
- Primary seminoma of left descended testis
- Primary seminoma of left testis
- Primary seminoma of right descended testis
- Primary seminoma of right testis
- Seminoma of descended testis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to C62.12: its own notes plus those printed at C62, block C60-C63, and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- malignant neoplasm of skin of male genital organs
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify any functional activity
Notes
General instructions on how these codes are used.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name C62.12, its category, or a range that includes it.
Applicable To 2
These notes mention C62.12.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Malignant Testicular Neoplasm
a primary or metastatic malignant neoplasm that affects the testis. representative examples include malignant germ cell tumors, sarcomas, leukemias, and lymphomas.
Table of NeoplasmsClinical
Patient EducationClinical
Testicular Cancer
Testicular cancer is a cancer that develops in the tissues of one or both testicles. The testicles, or testes, are part of the male reproductive system. They make male hormones and sperm. They are two egg-shaped glands inside the scrotum, a sac of loose skin that lies below the penis. You can get cancer in one or both testicles.
The full article covers:
- What is testicular cancer?
- Who is most likely to develop testicular cancer?
- What are the symptoms of testicular cancer?
- How is testicular cancer diagnosed?
- What are the treatments for testicular cancer?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert C62.12 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C62.12Overview
What is the ICD-10 code for malignant neoplasm of descended left testis?
The ICD-10-CM code for malignant neoplasm of descended left testis is C62.12 (sometimes written as C6212). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is C62.12 (Malignant neoplasm of descended testis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of descended left testis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does C62.12 group to?
When malignant neoplasm of descended left testis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 716, 723, 724, 715, 722, with relative weights from 0.5709 to 2.2896 depending on complications. Higher weights mean higher Medicare reimbursement.
Does C62.12 need an additional code?
When the condition applies, yes. The Use Additional Code note at C62, which applies to C62.12, reads: code to identify any functional activity. The additional code is reported after C62.12.
What is the ICD-9 equivalent of C62.12?
Under the General Equivalence Mappings, malignant neoplasm of descended left testis converts to ICD-9-CM 186.9 (malig neo testis NEC). The mapping is approximate, so confirm the match fits the documentation.
What HCC is C62.12?
C62.12 (malignant neoplasm of descended left testis) maps to CMS-HCC Category 23 (Prostate, Breast, and Other Cancers and Tumors), commonly written as HCC 23, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 12 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 22.
Does C62.12 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, C62.12 adds a risk adjustment factor of about 0.186 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.186 to 0.237 depending on the payment segment). A more severe related category (HCC 17, HCC 18, HCC 19, HCC 20, HCC 21, and HCC 22) supersedes it when both are reported. See the full factor table on the HCC 23 category page.
