Quick answers
- Which hospitals does Wallace Hayasaka work at?
- Medicare's official clinician data lists Wallace Hayasaka at 2 hospitals: Billings Clinic Hospital and Bozeman Health Deaconess Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Wallace Hayasaka see patients?
- Medicare's clinician data lists 3 practice locations, including Billings, MT, Livingston, MT and Bozeman, MT. Call before your visit to confirm the address.
- What is Wallace Hayasaka's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Wallace Hayasaka accept Medicare assignment?
- Yes. Medicare's clinician data says Wallace Hayasaka 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 Wallace Hayasaka?
- (406) 238-2500, as listed in official Medicare / NPI Registry data.
- What is Wallace Hayasaka's NPI number?
- 1477538155. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Wallace Hayasaka works
Medicare's Facility Affiliation Data lists Wallace Hayasaka at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Billings Clinic HospitalBillings, MT · Acute Care Hospital · CCN 270004
- Bozeman Health Deaconess HospitalBozeman, MT · Acute Care Hospital · CCN 270057
Practice locations
Addresses where Wallace Hayasaka is enrolled with Medicare (CMS data updated 2026-10-02).
- 2800 10th Ave N, Suite DBillings, MT 59101 (406) 238‑2500
- 320 Alpenglow LnLivingston, MT 59047 (406) 222‑3541
- 925 Highland Blvd, Suite 1180Bozeman, MT 59715 (406) 587‑8631
Group practices
Medicare enrollment lists Wallace Hayasaka as a member of these groups (CMS data updated 2026-10-02).
- Billings Clinic Specialty Supplies and Services, LLC824 clinicians in the group
- Gallatin Valley Anesthesia Associates PC35 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Billings
Clinicians with the same Medicare primary specialty in Billings, MT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477538155 |
| 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