William Christopher Sullivan, PA-C
Physician Assistant · Irvine, CA
William Christopher Sullivan, PA-C is a physician assistant with a practice address in Irvine, California, and NPI 1053662924, issued on Oct 1, 2012. Check the license (California PA22590, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Christopher Sullivan
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA22590 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Fire Authority RD, Irvine, CA 92602
- Phone
- (949) 205-6129
- Enumerated
- Oct 1, 2012
- Record last updated
- Mar 2, 2022
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 1 Fire Authority RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kenneth Miller, MD, PHDEmergency Medical Services (Emergency Medicine) Physician1669592614
Verify William Christopher Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA22590Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average physician assistant in 2024
37 Medicare Part D claims for 15 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
William Christopher Sullivan among 14,451 physician assistant records in California
William Christopher Sullivan, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 33% of them.
- NPI issued2012 · 33% of these records are older, 65% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2022 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
120 physician assistant records list a practice address in Irvine
They are 120 of the 7,778 NPPES records with a practice address in Irvine, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Irvine → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Laila Ayaz, PAIrvine, CA 926021417108861
- Thao Duong, PAIrvine, CA 926021326326570
- Summer Walker, PA-CIrvine, CA 926021912604307
- Rosmarie Ahsan, PA-CIrvine, CA 926031275084089
- Darlene Vuong, PA-CIrvine, CA 926031730553173
- Kelsey Chan, PAIrvine, CA 926041003284811
- Kevin Haley, P.A.Irvine, CA 926041730235383
- Elika Kamdar, PA-C, MMSIrvine, CA 926041578998589
Common questions
What is William Christopher Sullivan, PA-C's NPI number?
William Christopher Sullivan, PA-C's National Provider Identifier (NPI) is 1053662924, issued on Oct 1, 2012. An NPI identifies a provider in billing; it is not a license.
Where is William Christopher Sullivan, PA-C located?
The NPPES record lists a practice address at 1 Fire Authority RD, Irvine, CA, 92602. Phone: (949) 205-6129. Providers update this record themselves, so call before visiting.
How can I verify William Christopher Sullivan, PA-C's license?
NPPES lists California license number PA22590, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Christopher Sullivan, PA-C prescribe under Medicare Part D?
In 2024, William Christopher Sullivan, PA-C had 37 Medicare Part D claims for 15 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is William Christopher Sullivan, PA-C's MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.