Nathan Williams
Adult Medicine Physician · Thermal, CA
Nathan Williams is an adult medicine physician with a practice address in Thermal, California, and NPI 1548345473, issued on Oct 26, 2006. Check the license (California A79720, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nathan Williams
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- A79720 CA
Self-reported in NPPES; status is on the state search - Practice location
- 66735 Martinez St, Thermal, CA 92274
- Phone
- (800) 717-4476
- Enumerated
- Oct 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Verify Nathan Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A79720Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average adult medicine physician in 2024
354 Medicare Part D claims for 62 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Omeprazole26 claims
- Atorvastatin Calcium22 claims
- Levothyroxine Sodium19 claims
- Amlodipine Besylate15 claims
- Sertraline Hcl15 claims
- Metformin Hcl14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Nathan Williams among 386 adult medicine physician records in California
Nathan Williams is one of 386 adult medicine physician records with a practice address in California. 69% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 65% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 adult medicine physician record lists a practice address in Thermal
They are 1 of the 45 NPPES records with a practice address in Thermal, and 386 adult medicine physician records in California.
All 386 in California → Every provider in Thermal → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Mariela VentocillaTwentynine Palms, CA 922771972846756
- Richard Fausel, DORancho Mirage, CA 922701457300295
- Frank Arian, M.D.Palm Springs, CA 922621093894529
- Alexander Frid, D.OPalm Springs, CA 922621790851442
- Vance Fletcher, M.D.Mecca, CA 922541336210061
- Welim AzingeEl Centro, CA 922431093036543
- Keri Valdez, MSN, FNPCalexico, CA 922311417590548
- Walker Felix, M.D.Colton, CA 923241760554893
Common questions
What is Nathan Williams's NPI number?
Nathan Williams's National Provider Identifier (NPI) is 1548345473, issued on Oct 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Williams located?
The NPPES record lists a practice address at 66735 Martinez St, Thermal, CA, 92274. Phone: (800) 717-4476. Providers update this record themselves, so call before visiting.
How can I verify Nathan Williams's license?
NPPES lists California license number A79720, 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.
How much does Nathan Williams prescribe under Medicare Part D?
In 2024, Nathan Williams had 354 Medicare Part D claims for 62 beneficiaries; the average among adult medicine physician prescribers was 3,002. Part D covers Medicare prescriptions only.
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.