William Lee, MPAS
NPI 1437287315 · Medical Physician Assistant · Murrieta, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Lee, MPAS is a Medical Physician Assistant provider in Murrieta, CA (NPI 1437287315).
Provider details
- NPI number
- 1437287315
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MPAS
- Sex
- Male
- Sole proprietor
- No
- License
- 13497 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
867 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 325 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 128 | $75 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 88 | $38 |
| Destruction of Skin Growth, 1-14 Growths17110 | 76 | $83 |
| Shaving of Skin Growth of Body, Arms, Or Legs, 0.6-1.0 Cm11301 | 62 | $73 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 |
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 |
|---|---|---|
| Gentamicin Sulfate | 15 | 15 |
| Mupirocin | 15 | 15 |
| Ketoconazole | 14 | 11 |
| Fluocinolone/Shower Capbrand: Fluocinolone Acetonide | 12 | — |
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
Additional practice locations (1)
- 11302 Independence RdLos Alamitos, CA 90720-5155Phone: (562) 254-6529
Registry dates
- Enumerated
- 2007-03-01
- Last updated
- 2018-03-17
Frequently asked questions
- What is William Lee's NPI number?
- William Lee's National Provider Identifier (NPI) is 1437287315, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Lee's specialty?
- William Lee is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Lee located?
- William Lee's practice location on file with NPPES is 40663 Murrieta Hot Springs Rd Ste C3, Murrieta, CA 92562-9015.
- What is William Lee's phone number?
- The practice phone number listed in the NPPES registry for William Lee is (951) 677-5341.
- Does William Lee accept Medicare?
- William Lee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Lee's NPI active?
- Yes — William Lee's NPI (1437287315) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.