Deidre Elizabeth Williams, MD
Psychiatry Physician · Cupertino, CA
Deidre Elizabeth Williams, MD is a psychiatry physician with a practice address in Cupertino, California, and NPI 1366604209, issued on Jul 1, 2008. Check the license (California A106036, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Deidre Elizabeth Williams
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A106036 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19000 Homestead RD, Cupertino, CA 95014
- Phone
- (408) 366-4400
- Enumerated
- Jul 1, 2008
- Record last updated
- Jan 10, 2022
- Fax
- (408) 366-4405
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 19000 Homestead RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Smitha AkulaPsychiatry Physician1336522044
- Susan Baer, FNPFamily Nurse Practitioner1679684906
- Julissa Barboza, LCSWClinical Social Worker1619278207
- Mary BatesMarriage & Family Therapist1164960274
- Kathleen Boe, MFTMarriage & Family Therapist1962540260
- Gertrude Bonincontro, MFTMental Health Counselor1407907736
Verify Deidre Elizabeth Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A106036Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average psychiatry physician in 2024
949 Medicare Part D claims for 165 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 1% of claims.
Most prescribed
- Mirtazapine104 claims
- Bupropion Xl94 claims
- Sertraline Hcl71 claims
- Olanzapine63 claims
- Gabapentin56 claims
- Fluoxetine Hcl51 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.
Deidre Elizabeth Williams among 8,673 psychiatry physician records in California
Deidre Elizabeth Williams, MD 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 2008, is newer than 52% of them.
- NPI issued2008 · 52% of these records are older, 43% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2022 · 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).
15 psychiatry physician records list a practice address in Cupertino
They are 15 of the 945 NPPES records with a practice address in Cupertino, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Cupertino → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Smitha AkulaCupertino, CA 950141336522044
- Frederick Delse, M.D.Cupertino, CA 950141285728253
- Leo Hsu, MDCupertino, CA 950141679032569
- Leena Khanzode, MDCupertino, CA 950141003993957
- Misao Kusuda, MDCupertino, CA 950141336175561
- Mark McCormick, MDCupertino, CA 950141437236387
- Neha Nirodi, M.D.Cupertino, CA 950141164434148
- Richa Pathak, MDCupertino, CA 950141679749071
Common questions
What is Deidre Elizabeth Williams, MD's NPI number?
Deidre Elizabeth Williams, MD's National Provider Identifier (NPI) is 1366604209, issued on Jul 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Deidre Elizabeth Williams, MD located?
The NPPES record lists a practice address at 19000 Homestead RD, Cupertino, CA, 95014. Phone: (408) 366-4400. Providers update this record themselves, so call before visiting.
How can I verify Deidre Elizabeth Williams, MD's license?
NPPES lists California license number A106036, 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 Deidre Elizabeth Williams, MD prescribe under Medicare Part D?
In 2024, Deidre Elizabeth Williams, MD had 949 Medicare Part D claims for 165 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.
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.