2026 ICD-10-CM Diagnosis Code C46.2Kaposi's sarcoma of palate
ICD-10-CM Codes›C00–D49›C45-C49›C46
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 21
- Chronic Condition
C46.2 is a billable ICD-10-CM diagnosis code for Kaposi's sarcoma of palate. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 146 through 148, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 4 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sarcoma.
For Medicare Advantage risk adjustment, C46.2 maps to CMS-HCC Category 21 (Lymphoma and Other Cancers) under the V28 model, adding a risk factor of about 0.671 for a community, non-dual, aged beneficiary in payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
C46.2 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 2026.
Source: CMS Payment Year 2026 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.
- Kaposi's sarcoma of palate
- Primary Kaposi sarcoma of palate
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Sarcoma (of) See Also: Neoplasm, connective tissue, malignant;
palate (hard) (soft) C46.2
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Kaposi Sarcoma
Kaposi sarcoma, sometimes called KS, is a type of cancer. It causes lesions (abnormal tissue) to grow in different parts of the body, including:
The full article covers:
- What is Kaposi sarcoma?
- What causes Kaposi sarcoma and who is more likely to develop it?
- What are the symptoms of Kaposi sarcoma?
- How is Kaposi sarcoma diagnosed?
- What are the treatments for Kaposi sarcoma?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert C46.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C46.2Overview
What is the ICD-10 code for Kaposi's sarcoma of palate?
The ICD-10-CM code for Kaposi's sarcoma of palate is C46.2 (sometimes written as C462). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is C46.2 (Kaposi's sarcoma) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report Kaposi's sarcoma of palate on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C46.2 group to?
When Kaposi's sarcoma of palate is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 146, 147, 148, 974, 975, 976, with relative weights from 0.7971 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
Is C46.2 a CC or MCC?
CMS lists C46.2 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 4 closely related codes in its exclusion list.
What is the ICD-9 equivalent of C46.2?
Under the General Equivalence Mappings, Kaposi's sarcoma of palate converts to ICD-9-CM 176.2 (palate - kpsi's sarcoma). The mapping is a direct match.
What HCC is C46.2?
C46.2 (Kaposi's sarcoma of palate) maps to CMS-HCC Category 21 (Lymphoma and Other Cancers), commonly written as HCC 21, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2026. It mapped to HCC 10 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 20.
Does C46.2 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, C46.2 adds a risk adjustment factor of about 0.671 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.493 to 0.739 depending on the payment segment). A more severe related category (HCC 17, HCC 18, HCC 19, and HCC 20) supersedes it when both are reported. See the full factor table on the HCC 21 category page.
