Quick answers
- Does Matthew M. Grinsell accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew M. Grinsell accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Matthew M. Grinsell's NPI number?
- 1346364429. 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 M. Grinsell works
Medicare's Facility Affiliation Data lists Matthew M. Grinsell at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Alaska Regional HospitalAnchorage, AK · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 020017
- Lone Peak HospitalDraper, UT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 460060
- St Mark's HospitalSalt Lake City, UT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 460047
Practice locations
Addresses where Matthew M. Grinsell is enrolled with Medicare (CMS data updated October 2, 2026).
- 81 N Mario Capecchi DrSalt Lake City, UT 84113 (801) 213‑3599
Group practices
Medicare enrollment lists Matthew M. Grinsell as a member of this group (CMS data updated October 2, 2026).
- University of Utah Pediatric Services140 clinicians in the group
Specialties
- Pediatric Medicineprimary
- Nephrologyalso
Other pediatricians in Salt Lake City
Clinicians with the same Medicare primary specialty in Salt Lake City, UT — not a recommendation.
Other clinicians in University of Utah Pediatric Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Nevada School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346364429 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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