Mark Williams, MD
NPI 1235284225 · Diagnostic Radiology Physician · Bakersfield, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Williams, MD is a Diagnostic Radiology Physician provider in Bakersfield, CA (NPI 1235284225).
Provider details
- NPI number
- 1235284225
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G60262 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
5,660 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, 2 Views71046 | 1,342 | $34 |
| X-Ray of Knee, 3 Views73562 | 579 | $42 |
| X-Ray of Shoulder, Minimum of 2 Views73030 | 405 | $36 |
| X-Ray of Lower and Sacral Spine, Minimum of 4 Views72110 | 308 | $54 |
| X-Ray of Hand, Minimum of 3 Views73130 | 282 | $38 |
| X-Ray of Foot, Minimum of 3 Views73630 | 258 | $36 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Williams's NPI number?
- Mark Williams's National Provider Identifier (NPI) is 1235284225, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Williams's specialty?
- Mark Williams is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Williams located?
- Mark Williams's practice location on file with NPPES is 1817 Truxtun Ave, Bakersfield, CA 93301.
- What is Mark Williams's phone number?
- The practice phone number listed in the NPPES registry for Mark Williams is (661) 325-6800.
- Does Mark Williams accept Medicare?
- Mark Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Williams's NPI active?
- Yes — Mark Williams's NPI (1235284225) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.