What is CMS-1500?
Also called: HCFA 1500 · professional claim form
Hospitals and other institutional providers use the UB-04 (CMS-1450) instead. Which form applies is determined by the provider type and place of service, not by preference.
Even in fully electronic workflows the CMS-1500 remains the reference model: field numbers such as Box 24 for service lines and Box 33 for billing provider information are how payer companion guides and denial explanations are phrased.
Primary sources
Where "CMS-1500" is defined by the bodies that set the rules, rather than by us.
- CMS-1500 claim form standards (opens in a new tab)
National Uniform Claim Committee — Maintainer of the CMS-1500 professional claim form and its data element definitions, plus the provider taxonomy code set.
- Medicare Claims Processing Manual (opens in a new tab)
Centers for Medicare & Medicaid Services — The operative manual for how Medicare claims must be coded, submitted, adjusted and appealed. When a payer policy and a vendor's advice disagree, this settles it.
- CAQH Index: cost of administrative transactions (opens in a new tab)
CAQH — Per-transaction cost of eligibility checks, claim status inquiries and prior authorization, manual versus electronic. The best public evidence for automating front-end work.
Last reviewed August 20, 2026
Related terms
EDI 837
The EDI 837 is the HIPAA-mandated electronic format for submitting healthcare claims. The 837P variant carries professional claims, 837I carries institutional claims, and 837D carries dental. It is the electronic equivalent of a CMS-1500 or UB-04 paper form.
NPI
A National Provider Identifier is the 10-digit identifier required on all HIPAA standard transactions. Type 1 identifies an individual provider; Type 2 identifies an organization. Both usually appear on a claim — the rendering provider as Type 1, the billing entity as Type 2.
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