Quick answers
- Which hospitals does Brett Larsen work at?
- Medicare's official clinician data lists Brett Larsen at 2 hospitals: Evanston Regional Hospital and Merit Health Natchez. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brett Larsen see patients?
- Medicare's clinician data lists 4 practice locations, including Evanston, WY and Natchez, MS. Call before your visit to confirm the address.
- What is Brett Larsen's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Brett Larsen accept Medicare assignment?
- Yes. Medicare's clinician data says Brett Larsen 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 Brett Larsen?
- (307) 789-3636, as listed in official Medicare / NPI Registry data.
- What is Brett Larsen's NPI number?
- 1639367337. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brett Larsen works
Medicare's Facility Affiliation Data lists Brett Larsen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Evanston Regional HospitalEvanston, WY · Critical Access Hospital · CCN 531319
- Merit Health NatchezNatchez, MS · Acute Care Hospital · CCN 250084
Practice locations
Addresses where Brett Larsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 190 Arrowhead DrEvanston, WY 82930 (307) 789‑3636
- 196 Arrowhead DrEvanston, WY 82930
- 46 Seargent Prentiss DrNatchez, MS 39120
- 46 Seargent Prentiss Dr, Suite 100Natchez, MS 39120 (601) 442‑5388
Group practices
Medicare enrollment lists Brett Larsen as a member of these groups (CMS data updated 2026-10-02).
- Evanston Clinic Corp24 clinicians in the group
- Natchez Clinic Company LLC9 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Evanston
Clinicians with the same Medicare primary specialty in Evanston, WY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639367337 |
| 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