Jeffrey Williams, M.D., PHD
Endocrinology, Diabetes & Metabolism Physician · Santa Cruz, CA
Jeffrey Williams, M.D., PHD is an endocrinology, diabetes & metabolism physician with a practice address in Santa Cruz, California, and NPI 1942304977, issued on Sep 11, 2006. Check the license (California G52869, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jeffrey Williams
- Credential
- M.D., PHD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- G52869 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1595 Soquel Dr, Santa Cruz, CA 95065
- Phone
- (831) 465-7778
- Enumerated
- Sep 11, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (831) 475-0351
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1595 Soquel Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danessa Brown, MDFamily Medicine Physician1053514109
- Cheryl Demonner, PA-CMedical Physician Assistant1205067410
- Anna Dodge, AUDAudiologist1710266424
- Dilyana GeorgievaNurse Practitioner1346679149
- Treta Goyal, M.B.B.S,, M.P.H.Gastroenterology Physician1558612770
- Jennie Jet, M.D.Physical Medicine & Rehabilitation Physician1073579231
Verify Jeffrey Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G52869Check 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): 34.6 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).
Jeffrey Williams among 1,131 endocrinology, diabetes & metabolism physician records in California
Jeffrey Williams, M.D., PHD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Santa Cruz → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Pritisheel Banga, DOSanta Cruz, CA 950651043571151
- Aaron Pardini, M.D.Santa Cruz, CA 950651235147562
- Bahar Aghighi, MDSanta Cruz, CA 950621770562134
- David Karpf, M.D.Santa Cruz, CA 950621306913744
- Larry LevinSanta Cruz, CA 950621235119835
- Mehrnaz Ghasemiesfe, MDSanta Clara, CA 950511689134728
- Richard Cherlin, M.D.Los Gatos, CA 950321922060219
- Jaisri Maharaj, M.D.Los Gatos, CA 950321629380464
Common questions
What is Jeffrey Williams, M.D., PHD's NPI number?
Jeffrey Williams, M.D., PHD's National Provider Identifier (NPI) is 1942304977, issued on Sep 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey Williams, M.D., PHD located?
The NPPES record lists a practice address at 1595 Soquel Dr, Santa Cruz, CA, 95065. Phone: (831) 465-7778. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey Williams, M.D., PHD's license?
NPPES lists California license number G52869, 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 Jeffrey Williams, M.D., PHD's MIPS final score?
The 2023 MIPS final score is 34.6 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.