William Crain, MD
NPI 1669523338 · Procedural Dermatology Physician · Oakland, CA
William Crain, MD is a Procedural Dermatology Physician provider in Oakland, CA (NPI 1669523338).
Provider details
- NPI number
- 1669523338
- Entity type
- Individual
- Primary specialty
- Procedural Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C031924 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-16
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Crain's NPI number?
- William Crain's National Provider Identifier (NPI) is 1669523338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Crain's specialty?
- William Crain is listed in the NPPES registry with a primary specialty of Procedural Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is William Crain located?
- William Crain's practice location on file with NPPES is 3300 Webster St, Oakland, CA 94609-3117.
- What is William Crain's phone number?
- The practice phone number listed in the NPPES registry for William Crain is (510) 452-4900.
- Is William Crain's NPI active?
- Yes — William Crain's NPI (1669523338) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.