Quick answers
- Which hospitals does John D. Klemperer work at?
- Medicare's official clinician data lists John D. Klemperer at 5 hospitals: Calais Community Hospital, Northern Light A R Gould Hospital, Northern Light Eastern Maine Medical Center, Northern Light Sebasticook Valley Hospital and Northern Maine Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John D. Klemperer see patients?
- Medicare's clinician data lists 2 practice locations, including Bangor, ME. Call before your visit to confirm the address.
- What is John D. Klemperer's specialty?
- Medicare lists Cardiac Surgery as the primary specialty, and also Thoracic Surgery.
- Does John D. Klemperer accept Medicare assignment?
- Yes. Medicare's clinician data says John D. Klemperer 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 John D. Klemperer offer telehealth?
- Medicare's clinician data says John D. Klemperer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John D. Klemperer?
- (207) 973-7000, as listed in official Medicare / NPI Registry data.
- What is John D. Klemperer's NPI number?
- 1457337172. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John D. Klemperer works
Medicare's Facility Affiliation Data lists John D. Klemperer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Calais Community HospitalCalais, ME · Critical Access Hospital · CCN 201305
- Northern Light A R Gould HospitalPresque Isle, ME · Acute Care Hospital · CCN 200018
- Northern Light Eastern Maine Medical CenterBangor, ME · Acute Care Hospital · CCN 200033
- Northern Light Sebasticook Valley HospitalPittsfield, ME · Critical Access Hospital · CCN 201313
- Northern Maine Medical CenterFort Kent, ME · Critical Access Hospital · CCN 201317
Practice locations
Addresses where John D. Klemperer is enrolled with Medicare (CMS data updated 2026-10-02).
- 417 State StBangor, ME 04401
- 489 State StBangor, ME 04401 (207) 973‑7000
Group practices
Medicare enrollment lists John D. Klemperer as a member of this group (CMS data updated 2026-10-02).
- Eastern Maine Medical Center624 clinicians in the group
Specialties
- Cardiac Surgeryprimary
- Thoracic Surgeryalso
Other cardiac surgeons in Maine
Clinicians with the same Medicare primary specialty in Maine — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Buffalo School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1457337172 |
| 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