Michael Stephan
Physician Assistant · Stony Brook, NY
Michael Stephan is a physician assistant with a practice address in Stony Brook, New York, and NPI 1427609130, issued on Sep 24, 2019. Check the license (New York 023935-01, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael Stephan
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 023935-01 NY
Self-reported in NPPES; status is on the state search - Practice location
- 101 Nicolls RD, Stony Brook, NY 11794
- Phone
- (631) 689-8333
- Enumerated
- Sep 24, 2019
- Record last updated
- Dec 3, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 15,555 in New York → Look up another NPI →
Also registered at 101 Nicolls RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Verona AbdelmesehStudent in an Organized Health Care Education/Training Program1558926022
- Rula Abdulrahman, M.D.Nephrology Physician1790180776
- Dua AbedeenStudent in an Organized Health Care Education/Training Program1457153934
Verify Michael Stephan 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 023935-01Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average physician assistant in 2024
52 Medicare Part D claims for 41 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Mupirocin32 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 MIPS final score for 2023 (Medicare payment program): 98.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Michael Stephan among 15,555 physician assistant records in New York
Michael Stephan 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 2019, is newer than 56% of them.
- NPI issued2019 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 52% of these records are
- Record last updated2019 · 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).
128 physician assistant records list a practice address in Stony Brook
They are 128 of the 3,053 NPPES records with a practice address in Stony Brook, and 15,555 physician assistant records in New York.
All 15,555 in New York → Every provider in Stony Brook → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Robert Ansbach, R.P.A.-CStony Brook, NY 117941326041260
- Ricardo Aranguren, P.A.Stony Brook, NY 117941154357879
- Bryan Bobrowsky, P.A.Stony Brook, NY 117941720017031
- Colleen Calandra, P.A.Stony Brook, NY 117941215990593
- Scott CarterStony Brook, NY 117941730279779
- Dennis Duffy, P.A.Stony Brook, NY 117941932136447
- Karen Dybus, RPAStony Brook, NY 117941255334363
- Scott Marchini, P.A.Stony Brook, NY 117941255369401
Common questions
What is Michael Stephan's NPI number?
Michael Stephan's National Provider Identifier (NPI) is 1427609130, issued on Sep 24, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Michael Stephan located?
The NPPES record lists a practice address at 101 Nicolls RD, Stony Brook, NY, 11794. Phone: (631) 689-8333. Providers update this record themselves, so call before visiting.
How can I verify Michael Stephan's license?
NPPES lists New York license number 023935-01, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Michael Stephan prescribe under Medicare Part D?
In 2024, Michael Stephan had 52 Medicare Part D claims for 41 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Michael Stephan's MIPS final score?
The 2023 MIPS final score is 98.5 of 100. 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.