William Hamill, M.D.
NPI 1962572347 · Child & Adolescent Psychiatry Physician · Menlo Park, CA
Enrolled with Medicare as Order and Referring Only - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hamill, M.D. is a Child & Adolescent Psychiatry Physician provider in Menlo Park, CA (NPI 1962572347).
Provider details
- NPI number
- 1962572347
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G028574 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Zolpidem Tartrate | 43 |
| Clonazepam | 29 |
| Bupropion Hclbrand: Bupropion Xl | 25 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 25 |
| Lorazepam | 24 |
| Aripiprazole | 23 |
| Sertraline Hcl | 18 |
| Modafinil | 13 |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Hamill's NPI number?
- William Hamill's National Provider Identifier (NPI) is 1962572347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hamill's specialty?
- William Hamill is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Hamill located?
- William Hamill's practice location on file with NPPES is 830 Menlo Ave Ste 209, Menlo Park, CA 94025-4734.
- What is William Hamill's phone number?
- The practice phone number listed in the NPPES registry for William Hamill is (650) 327-6161.
- Does William Hamill accept Medicare?
- William Hamill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hamill's NPI active?
- Yes — William Hamill's NPI (1962572347) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.