Alexander Michael Stessin, M.D., PH.D.
Radiation Oncology Physician · Stony Brook, NY
Alexander Michael Stessin, M.D., PH.D. is a radiation oncology physician with a practice address in Stony Brook, New York, and NPI 1598992802, issued on Jun 12, 2009. Check the license (New York 274556, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Alexander Michael Stessin
- Credential
- M.D., PH.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 274556 NY
Self-reported in NPPES; status is on the state search - Practice location
- Dept OF Radiation Oncology Stony Brook Univ, Stony Brook, NY 11794
- Phone
- (347) 524-0947
- Enumerated
- Jun 12, 2009
- Record last updated
- Dec 8, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150107001138); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 449 in New York → Look up another NPI →
Verify Alexander Michael Stessin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 274556Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average radiation oncology physician in 2024
25 Medicare Part D claims for 18 beneficiaries, against an average of 134 among the 4,851 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 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).
Bills Medicare through one group practice
- Stony Brook Radiation Oncology, University Faculty Practice CorporatioStony Brook, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Michael Stessin among 449 radiation oncology physician records in New York
Alexander Michael Stessin, M.D., PH.D. is one of 449 radiation oncology physician records with a practice address in New York. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 58% of them.
- NPI issued2009 · 58% of these records are older, 38% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2009 · median 2005 among the 331 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in New York
There are 449 radiation oncology physician records in New York.
All 449 in New York → Every provider in Stony Brook → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Wyman Bethune, M.D.Stony Brook, NY 117941144268756
- Kartik Mani, M.D., PH.DStony Brook, NY 117941144586397
- Tae Park, M.D.Stony Brook, NY 117941932141942
- Samuel Ryu, M.D.Stony Brook, NY 117941639239049
- Alexander Slade, M.D., PH.D.Stony Brook, NY 117941093195281
- Tamara Weiss, M.D.Stony Brook, NY 117941710920806
- Jieying Wu, MDStony Brook, NY 117941184252629
- Johnny Kao, M.D.West Islip, NY 117951639141476
Common questions
What is Alexander Michael Stessin, M.D., PH.D.'s NPI number?
Alexander Michael Stessin, M.D., PH.D.'s National Provider Identifier (NPI) is 1598992802, issued on Jun 12, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Michael Stessin, M.D., PH.D. located?
The NPPES record lists a practice address at Dept OF Radiation Oncology Stony Brook Univ, Stony Brook, NY, 11794. Phone: (347) 524-0947. Providers update this record themselves, so call before visiting.
How can I verify Alexander Michael Stessin, M.D., PH.D.'s license?
NPPES lists New York license number 274556, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexander Michael Stessin, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Alexander Michael Stessin, M.D., PH.D. had 25 Medicare Part D claims for 18 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Alexander Michael Stessin, M.D., PH.D.'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.