Richard Alan Williams, MD
Diagnostic Radiology Physician · Santa Cruz, CA
Richard Alan Williams, MD is a diagnostic radiology physician with a practice address in Santa Cruz, California, and NPI 1952315350, issued on Jul 28, 2006. Check the license (California G43122, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard Alan Williams
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- G43122 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1661 Soquel Drive, Santa Cruz, CA 95065
- Phone
- (831) 476-7711
- Enumerated
- Jul 28, 2006
- Record last updated
- Jul 2, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (831) 476-6189
- Medicaid ID
- 00G431220 CA
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 1661 Soquel Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Neal Swanson, MDDiagnostic Radiology Physician1295841518
Verify Richard Alan Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G43122Check 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): 96.4 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).
Richard Alan Williams among 4,500 diagnostic radiology physician records in California
Richard Alan 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2008 · 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 Santa Cruz → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Nicholas Astromoff, MDSanta Cruz, CA 950651023031234
- Kenneth Averill, MDSanta Cruz, CA 950651538182712
- Jennifer Lin, M.D.Santa Cruz, CA 950651194935932
- Roy Martinez, M.D.Santa Cruz, CA 950651093714511
- Kevin McHugh, M.D.Santa Cruz, CA 950651609083369
- Edward Menges, MDSanta Cruz, CA 950651134133531
- Howard Nelson, MDSanta Cruz, CA 950651295749737
- Richard Peterson, MDSanta Cruz, CA 950651760496202
Common questions
What is Richard Alan Williams, MD's NPI number?
Richard Alan Williams, MD's National Provider Identifier (NPI) is 1952315350, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Alan Williams, MD located?
The NPPES record lists a practice address at 1661 Soquel Drive, Santa Cruz, CA, 95065. Phone: (831) 476-7711. Providers update this record themselves, so call before visiting.
How can I verify Richard Alan Williams, MD's license?
NPPES lists California license number G43122, 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 Richard Alan Williams, MD's MIPS final score?
The 2023 MIPS final score is 96.4 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.