Quick answers
- Which hospitals does John F. Lewison work at?
- Medicare's official clinician data lists John F. Lewison at 1 hospital: St Peters Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John F. Lewison see patients?
- Medicare's clinician data lists 3 practice locations, including Helena, MT. Call before your visit to confirm the address.
- What is John F. Lewison's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John F. Lewison accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Lewison 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 John F. Lewison?
- (406) 752-0440, as listed in official Medicare / NPI Registry data.
- What is John F. Lewison's NPI number?
- 1497795678. 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 F. Lewison works
Medicare's Facility Affiliation Data lists John F. Lewison at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- St Peters HealthHelena, MT · Acute Care Hospital · CCN 270003
Practice locations
Addresses where John F. Lewison is enrolled with Medicare (CMS data updated 2026-10-02).
- 2475 BroadwayHelena, MT 59601
- 2475 E Broadway StHelena, MT 59601
- 630 N Last Chance Gulch, Suite 1100Helena, MT 59601 (406) 752‑0440
Group practices
Medicare enrollment lists John F. Lewison as a member of these groups (CMS data updated 2026-10-02).
- St Peters Health199 clinicians in the group
- Superior Specialty Pharmacy of Montana LLC2 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Helena
Clinicians with the same Medicare primary specialty in Helena, MT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1497795678 |
| 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