NPPES file of Aug 9, 2026

Stephen Clay Williams, M.D.

Psychiatry Physician · Santa Rosa, CA

Stephen Clay Williams, M.D. is a psychiatry physician with a practice address in Santa Rosa, California, and NPI 1184778284, issued on Jan 23, 2007. Check the license (California A55291, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1184778284
Name
Stephen Clay Williams
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License numbers
A55291 CA
35.129375 OH
Self-reported in NPPES; status is on the state search
Practice location
480 Tesconi Cir Ste B, Santa Rosa, CA 95401
Phone
(707) 206-7268
Enumerated
Jan 23, 2007
Record last updated
Jul 9, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(707) 206-7254
Medicare enrollment
Enrolled (PECOS I20160919001921); accepts Medicare assignment
Medical or professional school
Rush Medical College Of Rush University, 1994
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →

Also registered at 480 Tesconi Cir Ste B

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Laurel Benson, LMFTMarriage & Family Therapist1700450863
  2. Sunny Bush, NPNurse Practitioner1548723422
  3. Krutika Chokhawala, MDPsychiatry Physician1740743988
  4. Prital DesaiPsychiatry Physician1801224092
  5. Carolyn Detierra, MFTMarriage & Family Therapist1780090571
  6. Laura Eriksson, LMFTMarriage & Family Therapist1356182265

Verify Stephen Clay Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A55291    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

68% fewer Medicare Part D claims than the average psychiatry physician in 2024

317 Medicare Part D claims for 62 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.

  1. Stephen Williams317
  2. Specialty average1,000

Most prescribed

  1. Quetiapine Fumarate19 claims
  2. Trazodone Hcl17 claims
  3. Duloxetine Hcl13 claims
  4. Vraylar13 claims
  5. Buprenorphine-Naloxone11 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.

Industry payments in 2024: $112.42

1 payment: food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Stephen Williams$112.42
  2. Specialty average$4,954.93

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Extended Care Specialists, IncHilliard, OH

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Stephen Clay Williams among 8,673 psychiatry physician records in California

Stephen Clay Williams, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% 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 33% of them.

  • NPI issued2007 · 33% of these records are older, 48% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 38% of these records are
  • Graduated1994 · median 2005 among the 3,295 with a school on file
  • Record last updated2021 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

73 psychiatry physician records list a practice address in Santa Rosa

They are 73 of the 6,884 NPPES records with a practice address in Santa Rosa, and 8,673 psychiatry physician records in California.

All 8,673 in California → Every provider in Santa Rosa → Psychiatry Physician nationwide →

The 8 psychiatry physician records with the nearest ZIP codes

  1. Jennifer Beck, M.D.Santa Rosa, CA 954011669523387
  2. Mounir Belcadi, MDSanta Rosa, CA 954011053341073
  3. Nancy Burkey, M.D.Santa Rosa, CA 954011730274697
  4. Robert Connor, MDSanta Rosa, CA 954011649260506
  5. Linda Funderburg, M.D.Santa Rosa, CA 954011164489571
  6. Michael Gamble, M.D.Santa Rosa, CA 954011437116381
  7. Nancy Herron, M.D.Santa Rosa, CA 954011780621367
  8. Jon Jackson, M.D.Santa Rosa, CA 954011598840472

Common questions

What is Stephen Clay Williams, M.D.'s NPI number?

Stephen Clay Williams, M.D.'s National Provider Identifier (NPI) is 1184778284, issued on Jan 23, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Clay Williams, M.D. located?

The NPPES record lists a practice address at 480 Tesconi Cir Ste B, Santa Rosa, CA, 95401. Phone: (707) 206-7268. Providers update this record themselves, so call before visiting.

How can I verify Stephen Clay Williams, M.D.'s license?

NPPES lists California license number A55291, 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 Stephen Clay Williams, M.D. prescribe under Medicare Part D?

In 2024, Stephen Clay Williams, M.D. had 317 Medicare Part D claims for 62 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.