Quick answers
- Where does Andrew D. Seidman see patients?
- Medicare's clinician data lists 3 practice locations, including Uniondale, NY and New York, NY. Call before your visit to confirm the address.
- What is Andrew D. Seidman's specialty?
- Medicare lists Medical Oncology as the primary specialty, and also Hematology/Oncology.
- Does Andrew D. Seidman accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew D. Seidman accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Andrew D. Seidman offer telehealth?
- Medicare's clinician data says Andrew D. Seidman offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Andrew D. Seidman?
- (212) 639-2000, as listed in official Medicare / NPI Registry data.
- What is Andrew D. Seidman's NPI number?
- 1578534335. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Andrew D. Seidman is enrolled with Medicare (CMS data updated 2026-10-02).
- 1101 Hempstead TpkeUniondale, NY 11553 (212) 639‑2000
- 1275 York AveNew York, NY 10065 (212) 639‑2000
- 300 E 66th StNew York, NY 10065 (646) 888‑5200
Group practices
Medicare enrollment lists Andrew D. Seidman as a member of these groups (CMS data updated 2026-10-02).
- Memorial Solid Tumor Group234 clinicians in the group
- MSK Nassau98 clinicians in the group
Specialties
- Medical Oncologyprimary
- Hematology/Oncologyalso
Other oncologists in Uniondale
Clinicians with the same Medicare primary specialty in Uniondale, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1578534335 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians