Quick answers
- Which hospitals does John A. Hamjian work at?
- Medicare's official clinician data lists John A. Hamjian at 1 hospital: Cape Cod Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John A. Hamjian see patients?
- Medicare's clinician data lists 1 practice location in Hyannis, MA. Call before your visit to confirm the address.
- What is John A. Hamjian's specialty?
- Medicare lists Neurology as the primary specialty.
- Does John A. Hamjian accept Medicare assignment?
- Yes. Medicare's clinician data says John A. Hamjian 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 A. Hamjian offer telehealth?
- Medicare's clinician data says John A. Hamjian offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John A. Hamjian?
- (508) 778-8585, as listed in official Medicare / NPI Registry data.
- What is John A. Hamjian's NPI number?
- 1124120613. 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 A. Hamjian works
Medicare's Facility Affiliation Data lists John A. Hamjian at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cape Cod HospitalHyannis, MA · Acute Care Hospital · CCN 220012
Practice locations
Addresses where John A. Hamjian is enrolled with Medicare (CMS data updated 2026-10-02).
- 2 Lynxholm CtHyannis, MA 02601 (508) 778‑8585
Specialties
- Neurologyprimary
Other neurologists in Hyannis
Clinicians with the same Medicare primary specialty in Hyannis, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1124120613 |
| 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