Quick answers
- Which hospitals does Matthew Lassen work at?
- Medicare's official clinician data lists Matthew Lassen at 2 hospitals: Gritman Medical Center and Pullman Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew Lassen see patients?
- Medicare's clinician data lists 6 practice locations, including Lewiston, ID and Moscow, ID. Call before your visit to confirm the address.
- What is Matthew Lassen's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Matthew Lassen accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew Lassen 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 Matthew Lassen?
- (208) 848-8300, as listed in official Medicare / NPI Registry data.
- What is Matthew Lassen's NPI number?
- 1932599214. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew Lassen works
Medicare's Facility Affiliation Data lists Matthew Lassen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Gritman Medical CenterMoscow, ID · Critical Access Hospital · CCN 131327
- Pullman Regional HospitalPullman, WA · Critical Access Hospital · CCN 501331
Practice locations
Addresses where Matthew Lassen is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1203 Idaho StLewiston, ID 83501 (208) 848‑8300
- 2500 W A St, Suite 101Moscow, ID 83843 (208) 882‑0540
- 623 S Main St, Suite 1Moscow, ID 83843 (208) 882‑2011
- 700 S Main StMoscow, ID 83843 (208) 883‑6236
- 803 S Main St, Suite 120Moscow, ID 83843 (208) 848‑8300
Group practices
Medicare enrollment lists Matthew Lassen as a member of these groups (CMS data updated 2026-10-02).
- Community Health Association of Spokane221 clinicians in the group
- Gritman Medical Center Inc27 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Lewiston
Clinicians with the same Medicare primary specialty in Lewiston, ID — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932599214 |
| 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