Quick answers
- Which hospitals does Jan Slezak work at?
- Medicare's official clinician data lists Jan Slezak at 3 hospitals: Concord Hospital- Laconia, Portsmouth Regional Hospital and York Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jan Slezak see patients?
- Medicare's clinician data lists 2 practice locations, including Rye, NH and Barrington, NH. Call before your visit to confirm the address.
- What is Jan Slezak's specialty?
- Medicare lists Anesthesiology as the primary specialty, and also Pain Management.
- Does Jan Slezak accept Medicare assignment?
- Yes. Medicare's clinician data says Jan Slezak 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 Jan Slezak?
- (603) 319-1581, as listed in official Medicare / NPI Registry data.
- What is Jan Slezak's NPI number?
- 1750357307. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jan Slezak works
Medicare's Facility Affiliation Data lists Jan Slezak at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Concord Hospital- LaconiaLaconia, NH · Acute Care Hospital · CCN 300005
- Portsmouth Regional HospitalPortsmouth, NH · Acute Care Hospital · CCN 300029
- York HospitalYork, ME · Acute Care Hospital · CCN 200020
Practice locations
Addresses where Jan Slezak is enrolled with Medicare (CMS data updated 2026-10-02).
- 270 Lafayette RdRye, NH 03870 (603) 319‑1581
- 944 Calef Hwy, Barrington Surgical CaBarrington, NH 03825 (603) 664‑0100
Group practices
Medicare enrollment lists Jan Slezak as a member of this group (CMS data updated 2026-10-02).
- Northeast Medical Consultants PC7 clinicians in the group
Specialties
- Anesthesiologyprimary
- Pain Managementalso
Other anesthesiologists in New Hampshire
Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750357307 |
| 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