William Ronan, M.D.
NPI 1245264548 · Pediatric Anesthesiology Physician · San Diego, CA
William Ronan, M.D. is a Pediatric Anesthesiology Physician provider in San Diego, CA (NPI 1245264548).
Provider details
- NPI number
- 1245264548
- Entity type
- Individual
- Primary specialty
- Pediatric Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A4743 (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
- 2006-07-10
- Last updated
- 2009-10-05
Frequently asked questions
- What is William Ronan's NPI number?
- William Ronan's National Provider Identifier (NPI) is 1245264548, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ronan's specialty?
- William Ronan is listed in the NPPES registry with a primary specialty of Pediatric Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Ronan located?
- William Ronan's practice location on file with NPPES is 3626 Ruffin Rd, San Diego, CA 92123-1810.
- What is William Ronan's phone number?
- The practice phone number listed in the NPPES registry for William Ronan is (858) 565-9666.
- Is William Ronan's NPI active?
- Yes — William Ronan's NPI (1245264548) is active in the NPPES registry as of the last update on 2009-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.