William Hamill, M.D.
Child & Adolescent Psychiatry Physician · Menlo Park, CA
William Hamill, M.D. is a child & adolescent psychiatry physician with a practice address in Menlo Park, California, and NPI 1962572347, issued on Nov 9, 2006. Check the license (California G028574, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Hamill
- Credential
- M.D.
- Primary taxonomy
- Child & Adolescent Psychiatry Physician 2084P0804X
- License number
- G028574 CA
Self-reported in NPPES; status is on the state search - Practice location
- 830 Menlo Ave Ste 209, Menlo Park, CA 94025
- Phone
- (650) 327-6161
- Enumerated
- Nov 9, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (650) 327-8014
- Entity
- Type 1 · individual
8 nearest child & adolescent psychiatry physician records → All 1,009 in California → Look up another NPI →
Also registered at 830 Menlo Ave Ste 209
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Avis Begoun, PHDClinical Psychologist1427357607
Verify William Hamill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G028574Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average child & adolescent psychiatry physician in 2024
281 Medicare Part D claims for 22 beneficiaries, against an average of 504 among the 3,545 providers of this specialty who prescribed in Part D.
Most prescribed
- Zolpidem Tartrate43 claims
- Clonazepam29 claims
- Bupropion Xl25 claims
- Citalopram Hbr25 claims
- Lorazepam24 claims
- Aripiprazole23 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.
William Hamill among 1,009 child & adolescent psychiatry physician records in California
William Hamill, M.D. is one of 1,009 child & adolescent psychiatry physician records with a practice address in California. 55% 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 · 55% of these records are
- In the CMS Doctors and Clinicians fileNo · 21% 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 2084P0804X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Child & Adolescent Psychiatry Physician providers in California
There are 1,009 child & adolescent psychiatry physician records in California.
All 1,009 in California → Every provider in Menlo Park → Child & Adolescent Psychiatry Physician nationwide →
The 8 child & adolescent psychiatry physician records with the nearest ZIP codes
- Marybeth Fox, M.D.Menlo Park, CA 940251174684674
- Trudy Hartman, MDMenlo Park, CA 940251831319102
- Lisa Jacobs, M.D.Menlo Park, CA 940251316366347
- Chun Chieh Luo, MDMenlo Park, CA 940251265963243
- George Reed, MDMenlo Park, CA 940251154582740
- Jennifer Zumarraga, M.D.Los Altos, CA 940241518987601
- Maria-Pilar Bernal, MDLos Altos, CA 940221649356155
- Quddusa Doongerwala, M.DBurlingame, CA 940101083704126
Common questions
What is William Hamill, M.D.'s NPI number?
William Hamill, M.D.'s National Provider Identifier (NPI) is 1962572347, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Hamill, M.D. located?
The NPPES record lists a practice address at 830 Menlo Ave Ste 209, Menlo Park, CA, 94025. Phone: (650) 327-6161. Providers update this record themselves, so call before visiting.
How can I verify William Hamill, M.D.'s license?
NPPES lists California license number G028574, 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 William Hamill, M.D. prescribe under Medicare Part D?
In 2024, William Hamill, M.D. had 281 Medicare Part D claims for 22 beneficiaries; the average among child & adolescent psychiatry physician prescribers was 504. 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.