Michael Francis O'Brien, PA-C
Physician Assistant · Halfmoon, NY
Michael Francis O'Brien, PA-C is a physician assistant with a practice address in Halfmoon, New York, and NPI 1104887884, issued on Mar 31, 2006. Check the license (New York 003610-1, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael Francis O'Brien
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 003610-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 103 Sitterly RD Ste 2300, Halfmoon, NY 12065
- Phone
- (518) 579-2650
- Enumerated
- Mar 31, 2006
- Record last updated
- Jul 10, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (518) 579-2670
- Medicare enrollment
- Enrolled (PECOS I20071008000518); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 15,555 in New York → Look up another NPI →
Also registered at 103 Sitterly RD Ste 2300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christina Mariotti, FNPFamily Nurse Practitioner1922841527
- Mahuwa Mukherjee, FNPFamily Nurse Practitioner1487417440
Verify Michael Francis O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 003610-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average physician assistant in 2024
2,283 Medicare Part D claims for 263 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 30 claims were for opioids.
Most prescribed
- Atorvastatin Calcium156 claims
- Lisinopril118 claims
- Rosuvastatin Calcium90 claims
- Omeprazole85 claims
- Losartan Potassium84 claims
- Levothyroxine Sodium78 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.
Industry payments in 2024: $1,435.61
82 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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.
One hospital affiliation
- Ellis HospitalHalfmoon, NY · Acute Care Hospitals3 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.
Michael Francis O'Brien among 15,555 physician assistant records in New York
Michael Francis O'Brien, PA-C is one of 15,555 physician assistant records with a practice address in New York. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1988 · median 2018 among the 8,158 with a school on file
- Record last updated2018 · 48% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 physician assistant records list a practice address in Halfmoon
They are 14 of the 194 NPPES records with a practice address in Halfmoon, and 15,555 physician assistant records in New York.
All 15,555 in New York → Every provider in Halfmoon → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Joyce Bellin, RPA-CClifton Park, NY 120651922119718
- Stephen Brendese, M.P.A-CClifton Park, NY 120651336202043
- Stephen Carson, PAClifton Park, NY 120651336232594
- Karen Doherty-Wells, PAClifton Park, NY 120651962494054
- William Fielding, P.A.Clifton Park, NY 120651154345015
- Joyce Gillespie, PAClifton Park, NY 120651679676456
- Cheryl Glick, RPA-CClifton Park, NY 120651255442059
- Steven Hicks, PAHalfmoon, NY 120651750477725
Common questions
What is Michael Francis O'Brien, PA-C's NPI number?
Michael Francis O'Brien, PA-C's National Provider Identifier (NPI) is 1104887884, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Francis O'Brien, PA-C located?
The NPPES record lists a practice address at 103 Sitterly RD Ste 2300, Halfmoon, NY, 12065. Phone: (518) 579-2650. Providers update this record themselves, so call before visiting.
How can I verify Michael Francis O'Brien, PA-C's license?
NPPES lists New York license number 003610-1, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Michael Francis O'Brien, PA-C prescribe under Medicare Part D?
In 2024, Michael Francis O'Brien, PA-C had 2,283 Medicare Part D claims for 263 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.