Mark I. Williams, MD
Diagnostic Radiology Physician · Bakersfield, CA
Mark I. Williams, MD is a diagnostic radiology physician with a practice address in Bakersfield, California, and NPI 1235284225, issued on Jan 23, 2007. Check the license (California G60262, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark I. Williams
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- G60262 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1817 Truxtun Ave, Bakersfield, CA 93301
- Phone
- (661) 325-6800
- Enumerated
- Jan 23, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (661) 325-4734
- Medicare enrollment
- Enrolled (PECOS I20081230000002); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 1817 Truxtun Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Parameshwari Baladandapani, MDDiagnostic Radiology Physician1205091329
- Godofredo Miranda, MDDiagnostic Radiology Physician1932254927
- John Roefs, MDNeuroradiology Physician1699820688
- Martha Wiedman, M.D.Diagnostic Radiology Physician1245347467
Verify Mark I. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G60262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 92.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Kern Radiology Medical Group IncBakersfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark I. Williams among 4,500 diagnostic radiology physician records in California
Mark I. Williams, MD is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 41% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1984 · median 2004 among the 3,130 with a school on file
- Record last updated2007 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Bakersfield → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Parameshwari Baladandapani, MDBakersfield, CA 933011205091329
- Tony Deeths, MDBakersfield, CA 933011386799377
- Aida Karahmet, MDBakersfield, CA 933011013053149
- Godofredo Miranda, MDBakersfield, CA 933011932254927
- James Nichols, MDBakersfield, CA 933011871605659
- Girish Patel, MDBakersfield, CA 933011205981297
- Martha Wiedman, M.D.Bakersfield, CA 933011245347467
- Jamshid Jamshidian, M.D.Bakersfield, CA 933051396938601
Common questions
What is Mark I. Williams, MD's NPI number?
Mark I. Williams, MD's National Provider Identifier (NPI) is 1235284225, issued on Jan 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark I. Williams, MD located?
The NPPES record lists a practice address at 1817 Truxtun Ave, Bakersfield, CA, 93301. Phone: (661) 325-6800. Providers update this record themselves, so call before visiting.
How can I verify Mark I. Williams, MD's license?
NPPES lists California license number G60262, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Mark I. Williams, MD's MIPS final score?
The 2023 MIPS final score is 92.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.