Registered Nurse in California
16,593 providers - Page 1 of 332
The CMS National Plan and Provider Enumeration System currently lists 16,593 Registered Nurse providers with a primary practice address in California. Each clinician on this roster selected Registered Nurse as their primary taxonomy at NPI enrollment, a self-reported classification that is updated whenever the provider files a correction with CMS. The count excludes organizations (group practices, hospitals, clinics operate under separate NPIs) and excludes providers who chose a different primary specialty even if they practice Registered Nurse part-time. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.
At 16,593 enrolled providers, Registered Nurse in California is a very well-covered market, that matters for search-radius decisions, because patients in California outside the largest metros often need to broaden to adjacent cities to find a local Registered Nurse clinician. The directory below is paginated 50 providers at a time (332 pages total) and is sorted alphabetically by last name, so scanning for a specific practice usually goes faster than scrolling; on the provider detail page you'll find the full NPPES record including address, phone, credentials, and any published Medicare Part D prescribing activity for 2024.
Before contacting anyone on this list, verify the practice is still at the address shown, NPPES refreshes monthly, but providers who have relocated, retired, or changed employers may not have filed an NPI update yet. Important: PlainDoctor is a directory of publicly available CMS government data covering Registered Nurse providers in California, not a quality ranking, a board-certification verifier, or medical advice. Always confirm credentials through the NPPES NPI Registry, the California medical board, and, where relevant, the ABMS, AOA, or the specialty's primary certifying body before making any clinical decision. Nothing on this page substitutes for a conversation with a licensed clinician.
Which cities have the most Registered Nurse in California
Provider concentration by primary practice city. Bars sized to San Diego = 100%.
Nationwide states with similar Registered Nurse headcount or density
Two PlainDoctor-derived peer sets for Registered Nurse in California: nearest other states by enrolled provider count and by providers per 100,000 residents. These are cross-state neighborhoods, not the top-enrollment list below.
Similar provider headcount
Nearest states by NPPES enrollment (16,593 here).
Similar providers per 100k residents
Nearest states by enrollment density (42.6 per 100k here).
Registered Nurse in Other States
Top states for Registered Nurse by CMS NPPES enrollment, use these to widen your search radius.
Provider data from CMS NPPES (download.cms.gov/nppes). Specialty classification from NUCC Health Care Provider Taxonomy (nucc.org). Each provider is identified by NPI. PlainDoctor does not rate or rank providers. Methodology · About
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-27.