Quick answers
- Which hospitals does Leo Stemp work at?
- Medicare's official clinician data lists Leo Stemp at 1 hospital: Holyoke Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Leo Stemp see patients?
- Medicare's clinician data lists 1 practice location in Holyoke, MA. Call before your visit to confirm the address.
- What is Leo Stemp's specialty?
- Medicare lists Anesthesiology as the primary specialty, and also Critical Care (Intensivists).
- Does Leo Stemp accept Medicare assignment?
- Yes. Medicare's clinician data says Leo Stemp 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.
- What is the phone number for Leo Stemp?
- (413) 534-2546, as listed in official Medicare / NPI Registry data.
- What is Leo Stemp's NPI number?
- 1528020278. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Leo Stemp works
Medicare's Facility Affiliation Data lists Leo Stemp at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holyoke Medical CenterHolyoke, MA · Acute Care Hospital · CCN 220024
Practice locations
Addresses where Leo Stemp is enrolled with Medicare (CMS data updated 2026-10-02).
- 575 Beech StHolyoke, MA 01040 (413) 534‑2546
Group practices
Medicare enrollment lists Leo Stemp as a member of this group (CMS data updated 2026-10-02).
- Holyoke Medical Center Inc205 clinicians in the group
Specialties
- Anesthesiologyprimary
- Critical Care (Intensivists)also
Other anesthesiologists in Holyoke
Clinicians with the same Medicare primary specialty in Holyoke, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528020278 |
| 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