This page compares two distinct NUCC-taxonomy specialties tracked by the CMS National Plan and Provider Enumeration System: Pain Medicine (Physical Medicine & Rehabilitation) Physician, which currently counts 1,630 enrolled providers across 50 U.S. states and territories, and Physical Medicine & Rehabilitation Physician, with 15,336 providers across 54 states. Each clinician on these rosters selected a primary NUCC code at NPI enrollment, so the totals measure how many providers self-identify their primary practice as Pain Medicine (Physical Medicine & Rehabilitation) Physician or Physical Medicine & Rehabilitation Physician rather than the total population ever trained or credentialed in either field, dual-certified clinicians show up under whichever code they registered first. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2023 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

On national volume, Physical Medicine & Rehabilitation Physician carries the larger provider roster (15,336 vs 1,630), and Physical Medicine & Rehabilitation Physician has the wider geographic footprint at 54 states versus 50. The top Pain Medicine (Physical Medicine & Rehabilitation) Physician concentration sits in California (243 providers), while Physical Medicine & Rehabilitation Physician peaks in California (1,518). The per-capita columns in the table below normalize each state's raw count against 2023 Census population estimates, which matters because absolute provider counts track population scale first and specialty density second, a small state with a strong training pipeline can out-rank a larger state on per-100K availability.

Use this comparison to understand relative availability, not to judge clinical substitutability - Pain Medicine (Physical Medicine & Rehabilitation) Physician and Physical Medicine & Rehabilitation Physician are distinct specialties with different scopes of practice, training requirements, and conditions they treat, even when their NUCC categories overlap. Important: PlainDoctor is a directory of publicly available CMS government data, not medical advice, a provider rating, or a recommendation about which specialty a patient should consult. Always work with a licensed clinician to determine which specialty is appropriate for your condition, verify any specific provider through the NPPES NPI Registry and the relevant state medical board, and consult the NUCC taxonomy documentation for the formal scope-of-practice definitions behind each specialty code.