ICD-10-CM code search with HCC risk adjustment mapping
Search the full 72,000-code FY2026 ICD-10-CM tabular list. Every billable code shows its CMS-HCC V28 and V24 mapping, RAF weight, MEAT documentation requirements, and common coding pitfalls. Built for risk adjustment coders working in Medicare Advantage. Zero PHI stored or transmitted, ever.
Most-coded HCC conditions
Start with the conditions that drive the largest share of risk adjustment factor scores in Medicare Advantage panels.
ICD-10-CM chapters
The 22 chapters of the FY2026 ICD-10-CM tabular list. Open the encoder to search any range with HCC mapping shown inline.
- A00-B99Infectious & Parasitic Diseases
- C00-D49Neoplasms (Cancer)
- E00-E89Endocrine, Nutritional, Metabolic
- F01-F99Mental, Behavioral, Neurodevelopmental
- G00-G99Diseases of the Nervous System
- I00-I99Diseases of the Circulatory System
- J00-J99Diseases of the Respiratory System
- K00-K95Diseases of the Digestive System
- M00-M99Musculoskeletal & Connective Tissue
- N00-N99Diseases of the Genitourinary System
Frequently asked questions
- What is ICD-10-CM and how does it relate to HCC coding?
- ICD-10-CM is the diagnosis code set used in the United States for outpatient and physician billing. CMS-HCC risk adjustment models (V28 and V24) take a subset of ICD-10-CM codes and group them into Hierarchical Condition Categories (HCCs) that drive Medicare Advantage payment. Every billable ICD-10-CM code on HCC Buddy shows its V28 HCC category, V24 HCC category, RAF weight, and MEAT documentation requirements so coders can capture the conditions that affect risk adjustment factor scores.
- How many ICD-10-CM codes are billable for HCC in 2026?
- The FY2026 ICD-10-CM tabular list contains roughly 72,000 codes, of which about 9,500 map to a CMS-HCC V28 payment category. The remaining codes are still billable for diagnosis but do not contribute to the patient's RAF score under risk adjustment. HCC Buddy filters and surfaces the HCC-mapped subset for every search so coders see payment-relevant codes first.
- Is the ICD-10 search free to use?
- Yes. ICD-10 code search, HCC mapping, and RAF lookup are free with a HCC Buddy account. Pro features (AI coding assistant, RAF calculator, code basket exports, drug-to-diagnosis lookup, and the Chrome extension) require a Pro subscription with a 14-day free trial. Zero PHI is stored or transmitted at any tier.
- How current is the ICD-10 code set on HCC Buddy?
- HCC Buddy ships the current FY2026 ICD-10-CM code set (effective October 1, 2025 through September 30, 2026), including the April 1, 2026 mid-year update. The CMS-HCC V28 model is at 100 percent phase-in for payment year 2026. Historical FY2016 through FY2025 code sets remain searchable for retrospective coding and audit work.