Quick answers
- Where does John Keaney Iii see patients?
- Medicare's clinician data lists 1 practice location in Boston, MA. Call before your visit to confirm the address.
- What is John Keaney Iii's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John Keaney Iii accept Medicare assignment?
- Yes. Medicare's clinician data says John Keaney Iii 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 Keaney Iii offer telehealth?
- Medicare's clinician data says John Keaney Iii offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John Keaney Iii?
- (617) 903-5000, as listed in official Medicare / NPI Registry data.
- What is John Keaney Iii's NPI number?
- 1598384844. 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 John Keaney Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 53 State St, Suite 106Boston, MA 02109 (617) 903‑5000
Group practices
Medicare enrollment lists John Keaney Iii as a member of this group (CMS data updated 2026-10-02).
- Mass General Brigham Community Physicians Inc428 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Medical school | Yale University School Of Medicine |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598384844 |
| 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