William Ashley, MD
NPI 1902942543 · Diagnostic Radiology Physician · Arroyo Grande, CA
William Ashley, MD is a Diagnostic Radiology Physician provider in Arroyo Grande, CA (NPI 1902942543).
Provider details
- NPI number
- 1902942543
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G33313 (CA)
Specialties & taxonomies
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
- 2007-01-30
- Last updated
- 2013-08-14
Frequently asked questions
- What is William Ashley's NPI number?
- William Ashley's National Provider Identifier (NPI) is 1902942543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ashley's specialty?
- William Ashley is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Ashley located?
- William Ashley's practice location on file with NPPES is 345 S Halcyon Rd, Arroyo Grande, CA 93420-3896.
- What is William Ashley's phone number?
- The practice phone number listed in the NPPES registry for William Ashley is (805) 473-7676.
- Is William Ashley's NPI active?
- Yes — William Ashley's NPI (1902942543) is active in the NPPES registry as of the last update on 2013-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.