Quick answers
- Which hospitals does John McCahan work at?
- Medicare's official clinician data lists John McCahan at 5 hospitals: Barrett Hospital & Healthcare, Bozeman Health Deaconess Hospital, Livingston Healthcare, St James Hospital and St Peters Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John McCahan see patients?
- Medicare's clinician data lists 1 practice location in Bozeman, MT. Call before your visit to confirm the address.
- What is John McCahan's specialty?
- Medicare lists Rheumatology as the primary specialty, and also Internal Medicine.
- Does John McCahan accept Medicare assignment?
- Yes. Medicare's clinician data says John McCahan 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 McCahan offer telehealth?
- Medicare's clinician data says John McCahan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John McCahan?
- (406) 414-2410, as listed in official Medicare / NPI Registry data.
- What is John McCahan's NPI number?
- 1144319922. 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 McCahan works
Medicare's Facility Affiliation Data lists John McCahan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barrett Hospital & HealthcareDillon, MT · Critical Access Hospital · CCN 271318
- Bozeman Health Deaconess HospitalBozeman, MT · Acute Care Hospital · CCN 270057
- Livingston HealthcareLivingston, MT · Critical Access Hospital · CCN 271317
- St James HospitalButte, MT · Acute Care Hospital · CCN 270017
- St Peters HealthHelena, MT · Acute Care Hospital · CCN 270003
Practice locations
Addresses where John McCahan is enrolled with Medicare (CMS data updated 2026-10-02).
- 931 Highland Blvd, Suite 3260Bozeman, MT 59715 (406) 414‑2410
Group practices
Medicare enrollment lists John McCahan as a member of this group (CMS data updated 2026-10-02).
- Bozeman Health Deaconess Hospital320 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Bozeman
Clinicians with the same Medicare primary specialty in Bozeman, MT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1144319922 |
| 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