Sebastian Alexander A. Mayer, MD
Hematology & Oncology Physician · New York, NY
Sebastian Alexander A. Mayer, MD is a hematology & oncology physician with a practice address in New York, New York, and NPI 1982627873, issued on Jul 25, 2006. Check the license (New York 230196, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Sebastian Alexander A. Mayer
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 230196 NY
Self-reported in NPPES; status is on the state search - Practice location
- 520 E. 70TH Street, New York, NY 10021
- Phone
- (212) 241-6756
- Enumerated
- Jul 25, 2006
- Record last updated
- Dec 19, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (212) 731-5220
- Medicaid ID
- 02801572 NY
- Medicare enrollment
- Enrolled (PECOS I20090225000255); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,163 in New York → Look up another NPI →
Also registered at 520 E. 70TH Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christine Krisch, NPAdult Health Nurse Practitioner1487305967
- Hana Lim, MDHematology & Oncology Physician1467870287
- Geoffrey Pitt, M.D.Cardiovascular Disease Physician1083760151
- Ronald Scheff, MDHematology & Oncology Physician1558333161
Verify Sebastian Alexander A. Mayer 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 230196Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
385 Medicare Part D claims for 50 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Pantoprazole Sodium36 claims
- Valacyclovir35 claims
- Xospata19 claims
- Metoprolol Succinate16 claims
- Vitamin D214 claims
- Fluconazole13 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): 100 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).
Industry payments in 2024: $100.91
3 payments; by number, the most common kind was food and beverage; the largest payer was Sanofi-Aventis U.S. LLC. The 8,560 providers of this specialty with any payment received $7,481.41 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 one group practice
- Weill Medical College OF CornellNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sebastian Alexander A. Mayer among 1,163 hematology & oncology physician records in New York
Sebastian Alexander A. Mayer, MD is one of 1,163 hematology & 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 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 53% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1998 · median 2002 among the 833 with a school on file
- Record last updated2011 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in New York
There are 1,163 hematology & oncology physician records in New York.
All 1,163 in New York → Every provider in New York → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Juliet Barker, MBBSNew York, NY 100211497726426
- Kathleen Cathcart, MDNew York, NY 100211508806050
- Chau Dang, MDNew York, NY 100211861422982
- Orli Etingin, MDNew York, NY 100211154418234
- Katharine Hsu, MDNew York, NY 100211720059769
- Jeffrey Laurence, MDNew York, NY 100211720175805
- Maria Palomba, MDNew York, NY 100211487625380
- Doru Paul, MDNew York, NY 100211629055959
Common questions
What is Sebastian Alexander A. Mayer, MD's NPI number?
Sebastian Alexander A. Mayer, MD's National Provider Identifier (NPI) is 1982627873, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sebastian Alexander A. Mayer, MD located?
The NPPES record lists a practice address at 520 E. 70TH Street, New York, NY, 10021. Phone: (212) 241-6756. Providers update this record themselves, so call before visiting.
How can I verify Sebastian Alexander A. Mayer, MD's license?
NPPES lists New York license number 230196, 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 Sebastian Alexander A. Mayer, MD prescribe under Medicare Part D?
In 2024, Sebastian Alexander A. Mayer, MD had 385 Medicare Part D claims for 50 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Sebastian Alexander A. Mayer, MD's MIPS final score?
The 2023 MIPS final score is 100 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.