PHD — Doctor of Philosophy
A doctoral degree; in healthcare often held by clinical psychologists and researchers.
PHD on NPI records
In the NPPES registry, credentials appear in the provider's name line (for example, “Jane Smith, PHD”). The credential is self-reported free text, so formatting varies (“PHD”, “P.H.D.”). Each provider profile on this site normalizes and explains the credential, and shows the taxonomy code and license number reported to NPPES alongside it.
Find a Doctor of Philosophy by name with the NPI lookup by name or browse specialty directories.
Frequently asked questions
What does PHD stand for?
PHD stands for Doctor of Philosophy. A doctoral degree; in healthcare often held by clinical psychologists and researchers.
Does a PHD have an NPI number?
Holders of the PHD may have an NPI if they provide or bill healthcare services; many obtain one for credentialing purposes.
How do I verify a PHD's license?
The NPI record shows the license number and state reported to NPPES (see any provider profile's taxonomy table). Verify licensure with the state licensing board — see our guide to verifying a provider's license.
Source: CMS NPPES (public data). Snapshot 2026-07-10.