Quick answers
- Which hospitals does Brett Larsen work at?
- Medicare's official clinician data lists Brett Larsen at 3 hospitals: Flagstaff Medical Center, McLaren Bay Region and McLaren Oakland. 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 5 practice locations, including Flagstaff, AZ, Bay City, MI and Pontiac, MI. Call before your visit to confirm the address.
- What is Brett Larsen's specialty?
- Medicare lists General Surgery 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?
- (928) 779-3366, as listed in official Medicare / NPI Registry data.
- What is Brett Larsen's NPI number?
- 1740552249. 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.
- Flagstaff Medical CenterFlagstaff, AZ · Acute Care Hospital · CCN 030023
- McLaren Bay RegionBay City, MI · Acute Care Hospital · CCN 230041
- McLaren OaklandPontiac, MI · Acute Care Hospital · CCN 230207
Practice locations
Addresses where Brett Larsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1200 N Beaver StFlagstaff, AZ 86001 (928) 779‑3366
- 1200 N Beaver St, Attn. Managed Care ContractingFlagstaff, AZ 86001
- 1215 N Beaver St, Suite 203Flagstaff, AZ 86001 (928) 773‑2249
- 1900 Columbus Ave, Bay RegionalBay City, MI 48708 (989) 894‑3000
- 50 N Perry StPontiac, MI 48342 (248) 338‑5000
Group practices
Medicare enrollment lists Brett Larsen as a member of these groups (CMS data updated 2026-10-02).
- Northern Arizona Healthcare Corporation385 clinicians in the group
- Acute Care Surgery Medical Group Inc204 clinicians in the group
- McLaren Bay Region113 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Flagstaff
Clinicians with the same Medicare primary specialty in Flagstaff, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740552249 |
| 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