Where our data comes from, and how old it is
Every dataset in this product is a public government file, and every page that shows you data from one also shows you which release it came from and when that release took effect. We are making a specific claim against the incumbents — that they ship stale reference data on expensive subscriptions — and a claim like that is only worth anything if we date-stamp our own work where you can see it.
ICD-10-CM
Loaded- Source
- CMS / CDC-NCHS, public domain
- Updated
- Annually on October 1, plus a mid-year update on April 1
The complete tabular list, alphabetic index, neoplasm table, table of drugs and chemicals, and the POA-exempt list. 98,186 codes, of which 74,719 are billable.
HCPCS Level II
Loaded- Source
- CMS, public domain
- Updated
- Quarterly
8,725 codes for the supplies, drugs, equipment and services that sit outside CPT — 7,418 of them still active. Free to browse at /hcpcs, with each code's Medicare coverage field and physician-fee-schedule status. No dental (D) codes: CDT is ADA-licensed and CMS strips it from the public file.
LCD / NCD / billing-and-coding articles
Loaded- Source
- CMS Medicare Coverage Database
- Updated
- Weekly, every Thursday
Medical-necessity policy by MAC jurisdiction. This is the dataset incumbents most often let go stale, and it is the one that decides whether a claim is covered.
Physician Fee Schedule (RVU, GPCI, conversion factor)
Loaded- Source
- CMS, public domain
- Updated
- Annually, with quarterly corrections
CY2026 introduces two conversion factors, one for qualifying APM participants and one for everyone else. Our calculator models both.
CMS-HCC risk-adjustment model (V28)
Loaded- Source
- CMS, public domain
- Updated
- Annually, with the payment-year coefficients
The full V28 model: diagnosis-to-HCC mappings, hierarchies, interaction terms, and coefficients for all nine segments. Powers the RAF calculator in the workspace.
NCCI PTP edits and MUE limits
Withheld- Source
- CMS, behind an AMA click-through licence
- Updated
- Quarterly
Not loaded. These files contain CPT codes, and CPT is copyrighted by the American Medical Association. NCCI and MUE checking ship together with CPT support.
CPT
Withheld- Source
- American Medical Association, licensed
- Updated
- Annually
Not included yet. CPT is the American Medical Association's copyrighted code set; when it arrives it will come from the AMA's own data files, never scraped or copied from elsewhere.
CPT is a registered trademark of the American Medical Association. This page is reference information for professional coders and is not medical, legal, or billing advice.