Michael David O'Reilly, PA-C
Physician Assistant · Orange, CA
Michael David O'Reilly, PA-C is a physician assistant with a practice address in Orange, California, and NPI 1669139879, issued on Nov 22, 2021. Check the license (California PA60602, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael David O'Reilly
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA60602 CA
PA2557 NV
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 456-8888
- Enumerated
- Nov 22, 2021
- Record last updated
- Nov 6, 2025
- Medicare enrollment
- Enrolled (PECOS I20220516002770); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Michael David O'Reilly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA60602Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% more Medicare Part D claims than the average physician assistant in 2024
1,219 Medicare Part D claims for 398 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 321 claims were for opioids.
Most prescribed
- Meloxicam592 claims
- Hydrocodone-Acetaminophen151 claims
- Methocarbamol140 claims
- Oxycodone Hcl75 claims
- Tramadol Hcl75 claims
- Baclofen23 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 52.6 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).
Industry payments in 2024: $209.27
2 payments; by number, the most common kind was food and beverage; the largest payer was Davol Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Regents OF The University OF CaliforniaOrange, CA
- University Surgeons OF Orange A Medical GroupOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael David O'Reilly among 14,451 physician assistant records in California
Michael David O'Reilly, 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 2021, is newer than 67% of them.
- NPI issued2021 · 67% of these records are older, 27% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2021 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 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).
181 physician assistant records list a practice address in Orange
They are 181 of the 13,245 NPPES records with a practice address in Orange, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Orange → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Renee Barton, PAOrange, CA 928681205933371
- Michelle Boucher, PAOrange, CA 928681750337895
- Tom Chow, PA-COrange, CA 928681003803115
- Kuljinder Dosanjh, P.A.Orange, CA 928681225018237
- Valerie George, PA-COrange, CA 928681740362920
- Helge Helgesen, PAOrange, CA 928681669541330
- Jennifer Judelson, PA-COrange, CA 928681053477216
- Vasco Kidd, PAOrange, CA 928681396804019
Common questions
What is Michael David O'Reilly, PA-C's NPI number?
Michael David O'Reilly, PA-C's National Provider Identifier (NPI) is 1669139879, issued on Nov 22, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Michael David O'Reilly, PA-C located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 456-8888. Providers update this record themselves, so call before visiting.
How can I verify Michael David O'Reilly, PA-C's license?
NPPES lists California license number PA60602, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Michael David O'Reilly, PA-C prescribe under Medicare Part D?
In 2024, Michael David O'Reilly, PA-C had 1,219 Medicare Part D claims for 398 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Michael David O'Reilly, PA-C's MIPS final score?
The 2023 MIPS final score is 52.6 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.