Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Sebastian Alexander A Mayer, MD

Individual provider Hematology (Internal Medicine) Physician · NPI 1982627873

Sebastian Alexander A Mayer, MD is a Hematopoietic Cell Transplantation and Cellular Therapy in New York, New York. Qualified in 1998, 28 years ago. Practices with Weill Medical College of Cornell, a 2,031-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
28
Licensed in
NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

520 E 70th Street Starr 3
New York, NY 10021
Phone: (212) 241-6756
Fax: (212) 731-5220
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 230196 (NY)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 230196 (NY)

Record details

NPI number1982627873
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 25, 2006
Last updated in NPPESDecember 19, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOPOIETIC CELL TRANSPLANTATION AND CELLULAR THERAPY
Also practisesMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Weill Medical College Of Cornell — 2031 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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