Reilly Owen Loomis, PA-C
Physician Assistant · Stanford, CA
Reilly Owen Loomis, PA-C is a physician assistant with a practice address in Stanford, California, and NPI 1053763284, issued on Jul 12, 2016. Check the license (California PA56705, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Reilly Owen Loomis
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA56705 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Jul 12, 2016
- Record last updated
- Dec 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20190614001210); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
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Verify Reilly Owen Loomis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA56705Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average physician assistant in 2024
697 Medicare Part D claims for 199 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims. 154 claims were for opioids.
Most prescribed
- Meloxicam131 claims
- Oxycodone Hcl128 claims
- Enoxaparin Sodium93 claims
- Pantoprazole Sodium83 claims
- Ondansetron Hcl58 claims
- Naloxone Hcl51 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Reilly Owen Loomis among 14,451 physician assistant records in California
Reilly Owen Loomis, 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 2016, is newer than 44% of them.
- NPI issued2016 · 44% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2016 · 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).
480 physician assistant records list a practice address in Stanford
They are 480 of the 5,606 NPPES records with a practice address in Stanford, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Stanford → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jaclyn Bilello, PA-CStanford, CA 943051285695445
- Deanna Cully, PA-CStanford, CA 943051912967779
- Deborah Espinoza, PA-CStanford, CA 943051558361733
- Lorin Ferguson, PA-CStanford, CA 943051912972340
- John Laurence, PA-CStanford, CA 943051568445070
- David Miller, PA-CStanford, CA 943051538140413
- Irina Penev, PA-CStanford, CA 943051851361646
- Pamela Piacente-Rhodes, PA-CStanford, CA 943051598735227
Common questions
What is Reilly Owen Loomis, PA-C's NPI number?
Reilly Owen Loomis, PA-C's National Provider Identifier (NPI) is 1053763284, issued on Jul 12, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Reilly Owen Loomis, PA-C located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Reilly Owen Loomis, PA-C's license?
NPPES lists California license number PA56705, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Reilly Owen Loomis, PA-C prescribe under Medicare Part D?
In 2024, Reilly Owen Loomis, PA-C had 697 Medicare Part D claims for 199 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
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.