William Tanner, M.D.
NPI 1457383929 · Body Imaging Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Tanner, M.D. is a Body Imaging Physician provider in Walnut Creek, CA (NPI 1457383929).
Provider details
- NPI number
- 1457383929
- Entity type
- Individual
- Primary specialty
- Body Imaging PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A63125 (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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
141 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 | 60 | $9 |
| Ct Scan Head Or Brain Without Contrast70450 | 28 | $40 |
| Screening Mammography77067 | 23 | $71 |
| X-Ray of Chest, 2 Views71046 | 19 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 11 | $88 |
Typical Medicare-allowed amounts for these services range $9–$88 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 411 30th St#508Oakland, CA 94609-3310Phone: (925) 274-4950
Registry dates
- Enumerated
- 2006-07-07
- Last updated
- 2021-12-20
- Certified
- 2021-11-05
Frequently asked questions
- What is William Tanner's NPI number?
- William Tanner's National Provider Identifier (NPI) is 1457383929, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Tanner's specialty?
- William Tanner is listed in the NPPES registry with a primary specialty of Body Imaging Physician (Allopathic & Osteopathic Physicians).
- Where is William Tanner located?
- William Tanner's practice location on file with NPPES is 2125 Oak Grove Rd Ste 200, Walnut Creek, CA 94598-2520.
- What is William Tanner's phone number?
- The practice phone number listed in the NPPES registry for William Tanner is (925) 296-7150.
- Does William Tanner accept Medicare?
- William Tanner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Tanner's NPI active?
- Yes — William Tanner's NPI (1457383929) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.