NPI vs DEA vs State License Number
An NPI identifies a provider for billing and transactions. A license shows permission to practice. A DEA number allows prescribing controlled substances.
Side by side
| Number | Issued by | What it's for |
|---|---|---|
| NPI | CMS (through NPPES) | Identifying a provider on claims and health care transactions. Free. Doesn't expire. |
| State license number | A state licensing board | Permission to practice a profession in that state. A provider may hold several, and they renew on a schedule. |
| DEA registration | The Drug Enforcement Administration | Permission to prescribe or dispense controlled substances. Different from an NPI. |
| Tax ID (TIN/EIN) | The IRS | Tax reporting for the practice or the individual. Also used when billing. |
Why people confuse them
Forms often ask for several at once, and credentialing and billing both use them. The NPI registry can show a license number a provider chose to list, but the license itself is verified with the state board, not through NPPES.
What an NPI doesn't prove
Anyone can get an NPI by applying, so an NPI alone isn't proof of a license, board certification or good standing. To check that someone is licensed, use your state's licensing board lookup.
Sources
Reviewed October 2026. Federal rules and CMS pages change; check them for the latest.
Look one up
Need a number now? Search the registry by NPI, name or organization.