William Prentice, PHYSICIAN ASSISTANT
NPI 1285969543 · Surgical Physician Assistant · Pasadena, CA
William Prentice, PHYSICIAN ASSISTANT is a Surgical Physician Assistant provider in Pasadena, CA (NPI 1285969543).
Provider details
- NPI number
- 1285969543
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PHYSICIAN ASSISTANT
- Sex
- Male
- Sole proprietor
- Yes
- License
- PA 15229 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 24 | 24 |
| Azithromycin | 17 | 17 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 12 | 12 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude 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 no Part D record, 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
- 2009-10-05
- Last updated
- 2009-10-05
Frequently asked questions
- What is William Prentice's NPI number?
- William Prentice's National Provider Identifier (NPI) is 1285969543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Prentice's specialty?
- William Prentice is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Prentice located?
- William Prentice's practice location on file with NPPES is 1119 E Elizabeth St, Pasadena, CA 91104-2415.
- What is William Prentice's phone number?
- The practice phone number listed in the NPPES registry for William Prentice is (213) 422-4162.
- Is William Prentice's NPI active?
- Yes — William Prentice's NPI (1285969543) is active in the NPPES registry as of the last update on 2009-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.