HCC Buddy vs ICD10Data: Beyond Free ICD-10 Code Lookup
ICD10Data.com is the most popular free ICD-10-CM code lookup tool on the web. It provides code descriptions, hierarchy navigation, and tabular listings at no cost. HCC Buddy goes beyond basic code lookup by adding HCC mapping, Ask Buddy, and professional tools designed for risk adjustment workflows. Here is how they compare.
| Feature | HCC Buddy | ICD10Data.com |
|---|---|---|
| ICD-10-CM Code Lookup | 74,000+ codes | 74,000+ codes |
| Code Hierarchy Navigation | Chapter/section tree | Tabular list navigation |
| HCC Category Mapping | current CY2026 V28 + historical PY2025 V24 reference | Not verified |
| Code-level RAF context | Source-labeled references | Not verified |
| Coding question assistant | Ask Buddy | Not verified |
| NPI Provider Lookup | NPPES reference lookup | Not verified |
| Drug-to-Diagnosis Reference | Included | Not verified |
| Chrome Extension | Side panel + sidebar | Not verified |
| Clinical Detail | Includes/Excludes notes | Includes/Excludes notes |
| Ads | None | Ad-supported |
| Price | $19.99/mo founding, then $29.99/mo | Free |
Free Code Lookup vs Professional Coding Platform
ICD10Data.com is a free reference tool designed for quick code lookups. It shows code descriptions, Includes/Excludes notes, and tabular hierarchy navigation. HCC Buddy adds HCC mapping, source-labeled coefficient references, V28 PY2026 member requirements, Ask Buddy, NPI lookup, and drug-to-diagnosis reference.
HCC Mapping Changes Everything
ICD10Data shows a code's description and clinical notes. HCC Buddy adds the available HCC category and model version. Public pages retain source-labeled coefficient references. The RAF tool shows a CMS-HCC V28 PY2026 member result only with the complete diagnosis set and member details and passing CMS source checks. Otherwise, it shows no score. HCC Buddy's mapping tables are built directly from the CMS 2026 Model Software ICD-10 mappings, the authoritative crosswalk between ICD-10-CM codes and the V28 risk adjustment categories. For risk adjustment coders, this context is the difference between a basic lookup tool and a purpose-built coding platform.
Ad-Free Professional Experience
ICD10Data is free but ad-supported, with display ads throughout the interface. HCC Buddy has no advertisements and is designed for focused coding sessions where distractions cost time and accuracy. The clean, ad-free interface also supports dark mode for extended screen time during chart review.
Where ICD10Data Wins
ICD10Data.com is completely free with no limits and no account required. It has been the go-to ICD-10-CM reference for years, is indexed by search engines for every code, and is excellent for quick one-off lookups by coders who do not need HCC mapping or risk adjustment tools. Both ICD10Data and HCC Buddy ultimately source their code descriptions from the same CMS ICD-10-CM code set, so if you only need to look up a code description occasionally, ICD10Data is hard to beat.
Disclaimer: HCC Buddy is not affiliated with ICD10Data.com. Product details based on publicly available information as of September 2026 and may have changed since this page was last updated. This comparison is provided for informational purposes only.
Risk-adjusting code hub
Free lookup is fine. Mapped code depth is the real differentiator.
This directory exposes the billable V28 code pages that a basic free lookup tool does not organize around risk adjustment. It gives readers a direct bridge from comparison content into code-level HCC work.
Directory page 1
A01.04 to C34.12
250 billable mapped codes
Directory page 2
C34.2 to C62.91
250 billable mapped codes
Directory page 3
C62.92 to C81.49
250 billable mapped codes
Directory page 4
C81.4A to C84.75
250 billable mapped codes
Directory page 5
C84.76 to D03.72
250 billable mapped codes
Directory page 6
D03.8 to E08.3513
250 billable mapped codes
See the mapping HCC Buddy does in one card
One ICD-10-CM lookup returns available risk-model mapping evidence in a single card. Current CMS-HCC V28 stays distinct from historical PY2025 V24, and code-level coefficients are source-labeled references, not member totals.
Compare with your real workflow
Turn a free lookup into an HCC-ready code review.
Try a code you would normally search on ICD10Data. HCC Buddy keeps the code description, then adds billable status, V28 mapping, RAF context, and chart-review reminders.
Or see the full HCC coding software toolkit — every lookup, calculator, and reference in one place.
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