William Gonser, M.D.
NPI 1952348617 · Diagnostic Radiology Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Gonser, M.D. is a Diagnostic Radiology Physician provider in Fairfield, CA (NPI 1952348617).
Provider details
- NPI number
- 1952348617
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G73301 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
842 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 269 | $8 |
| Imaging Guidance for Procedure, 60 Minutes Or Less76000 | 66 | $13 |
| Ct Scan Head Or Brain Without Contrast70450 | 65 | $38 |
| X-Ray of Chest, 2 Views71046 | 47 | $10 |
| X-Ray of Pelvis, 1-2 Views72170 | 43 | $8 |
| X-Ray of Knee, 1-2 Views73560 | 43 | $7 |
| Mri Scan of Brain Without Contrast70551 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-01
- Last updated
- 2012-04-16
Frequently asked questions
- What is William Gonser's NPI number?
- William Gonser's National Provider Identifier (NPI) is 1952348617, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gonser's specialty?
- William Gonser is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Gonser located?
- William Gonser's practice location on file with NPPES is 1200 B Gale Wilson Blvd, Fairfield, CA 94533-3552.
- What is William Gonser's phone number?
- The practice phone number listed in the NPPES registry for William Gonser is (707) 464-6510.
- Does William Gonser accept Medicare?
- William Gonser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Gonser's NPI active?
- Yes — William Gonser's NPI (1952348617) is active in the NPPES registry as of the last update on 2012-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.