Provider profile · NPI 1144462441
John Nathan Allan, M.D.
Internal Medicine, Hematology & Oncology · New York, NY · NPI 1144462441 · No federal exclusion match
✔ Verified against the public CMS NPPES registry & HHS-OIG LEIE as of Jun 21, 2026. Source-linked, daily-refreshed. Public data only — no PHI.
Registry details
Type
Individual
Primary specialty
Internal Medicine, Hematology & Oncology
Enumerated
Apr 1, 2009
License(s)
264134 (NY)
Addresses on file
| Purpose | Address | City/State | Phone |
|---|---|---|---|
| MAILING | 575 LEXINGTON AVE | New York, NY 10022-6102 | 646-962-2064 |
| LOCATION | 520 E 70TH ST STARR PAVILION 341 | New York, NY 10021-9800 | 646-962-2064 |
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