Quick answers
- Where does Ryan Ahern see patients?
- Medicare's clinician data lists 2 practice locations, including Greenfield, MA and Springfield, MA. Call before your visit to confirm the address.
- What is Ryan Ahern's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Ryan Ahern accept Medicare assignment?
- Yes. Medicare's clinician data says Ryan Ahern 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 Ryan Ahern?
- (413) 773-2840, as listed in official Medicare / NPI Registry data.
- What is Ryan Ahern's NPI number?
- 1396438560. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ryan Ahern is enrolled with Medicare (CMS data updated 2026-10-02).
- 164 High StGreenfield, MA 01301 (413) 773‑2840
- 759 Chestnut StSpringfield, MA 01199 (413) 794‑5439
Group practices
Medicare enrollment lists Ryan Ahern as a member of this group (CMS data updated 2026-10-02).
- Baystate Medical Practices Inc1,369 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Greenfield
Clinicians with the same Medicare primary specialty in Greenfield, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396438560 |
| 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
- 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