Quick answers
- Which hospitals does David Mastrianni work at?
- Medicare's official clinician data lists David Mastrianni at 4 hospitals: Adirondack Medical Center - Saranac Lake, Canton-Potsdam Hospital, The University of Vermont Health Network - Champl… and The University of Vermont Health Network-Alice Hy. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David Mastrianni see patients?
- Medicare's clinician data lists 1 practice location in Saranac Lake, NY. Call before your visit to confirm the address.
- What is David Mastrianni's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does David Mastrianni accept Medicare assignment?
- Yes. Medicare's clinician data says David Mastrianni 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 David Mastrianni offer telehealth?
- Medicare's clinician data says David Mastrianni offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for David Mastrianni?
- (518) 891-4141, as listed in official Medicare / NPI Registry data.
- What is David Mastrianni's NPI number?
- 1417954264. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David Mastrianni works
Medicare's Facility Affiliation Data lists David Mastrianni at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adirondack Medical Center - Saranac LakeSaranac Lake, NY · Acute Care Hospital · CCN 330079
- Canton-Potsdam HospitalPotsdam, NY · Acute Care Hospital · CCN 330197
- The University of Vermont Health Network - Champl…Plattsburgh, NY · Acute Care Hospital · CCN 330250
- The University of Vermont Health Network-Alice HyMalone, NY · Critical Access Hospital · CCN 331321
Practice locations
Addresses where David Mastrianni is enrolled with Medicare (CMS data updated 2026-10-02).
- 2233 State Route 86Saranac Lake, NY 12983 (518) 891‑4141
Group practices
Medicare enrollment lists David Mastrianni as a member of this group (CMS data updated 2026-10-02).
- Adirondack Medical Center87 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1417954264 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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