William James Lee, MPAS
Medical Physician Assistant · Murrieta, CA
William James Lee, MPAS is a medical physician assistant with a practice address in Murrieta, California, and NPI 1437287315, issued on Mar 1, 2007. Check the license (California PA13497, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William James Lee
- Credential
- MPAS
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License numbers
- PA13497 CA
13497 CA
Self-reported in NPPES; status is on the state search - Practice location
- 40663 Murrieta Hot Springs RD Ste C3, Murrieta, CA 92562
- Phone
- (951) 677-5341
- Enumerated
- Mar 1, 2007
- Record last updated
- Mar 17, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (951) 387-8004
- Medicare enrollment
- Enrolled (PECOS I20140716001053); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 40663 Murrieta Hot Springs RD Ste C3
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Raza Mehdi, MDFamily Medicine Physician1902890296
Verify William James Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA13497Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average medical physician assistant in 2024
211 Medicare Part D claims for 96 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Gentamicin Sulfate15 claims
- Mupirocin15 claims
- Ketoconazole14 claims
- Fluocinolone Acetonide12 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- LA Laser Center PC A Professional Medical CorporationPalm Springs, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William James Lee among 3,376 medical physician assistant records in California
William James Lee, MPAS is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 20% of them.
- NPI issued2007 · 20% of these records are older, 68% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated1993 · median 2012 among the 1,347 with a school on file
- Record last updated2018 · 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 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Murrieta → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Hayden Brickle, P.A.Murrieta, CA 925621528211331
- Traci Dyer, PAMurrieta, CA 925621376820266
- Justus Ehlers, PA-CMurrieta, CA 925621912984535
- Mary Gausepohl, PA-CMurrieta, CA 925621841362837
- Steve Gruer, PA-CMurrieta, CA 925621760526263
- Monique Hernandez, PAMurrieta, CA 925621134692692
- Gordon Iwasaki, PAMurrieta, CA 925621619149929
- Tiffany Kaufman-Scanna, PA CMurrieta, CA 925621912099557
Common questions
What is William James Lee, MPAS's NPI number?
William James Lee, MPAS's National Provider Identifier (NPI) is 1437287315, issued on Mar 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William James Lee, MPAS located?
The NPPES record lists a practice address at 40663 Murrieta Hot Springs RD Ste C3, Murrieta, CA, 92562. Phone: (951) 677-5341. Providers update this record themselves, so call before visiting.
How can I verify William James Lee, MPAS's license?
NPPES lists California license number PA13497, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William James Lee, MPAS prescribe under Medicare Part D?
In 2024, William James Lee, MPAS had 211 Medicare Part D claims for 96 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is William James Lee, MPAS's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.