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Family Practice

Brian Thielen, MD

Works at hospitals in Libby, MT · Kealakekua, HI · Kalispell, MT · Montana, Hawaii

Summary

Brian Thielen, MD (Family Practice) is listed by Medicare at 3 hospitals in Libby, MT, Kealakekua, HI and Kalispell, MT. NPI 1568042885. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Brian Thielen, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Family PracticePrimary specialty
YesAccepts Medicare assignment
5Years since medical school (graduated 2021)
University Of Minnesota Medical SchoolMedical school
MaleGender (as listed)
Kalispell Regional Medical Center IncGroup practice (+2 more)

Quick answers

Which hospitals does Brian Thielen work at?
Medicare's official clinician data lists Brian Thielen at 3 hospitals: Cabinet Peaks Medical Center, Kona Community Hospital and Logan Health Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Brian Thielen see patients?
Medicare's clinician data lists 3 practice locations, including Kalispell, MT, Libby, MT and Kealakekua, HI. Call before your visit to confirm the address.
What is Brian Thielen's specialty?
Medicare lists Family Practice as the primary specialty.
Does Brian Thielen accept Medicare assignment?
Yes. Medicare's clinician data says Brian Thielen 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 Brian Thielen?
(406) 752-8433, as listed in official Medicare / NPI Registry data.
What is Brian Thielen's NPI number?
1568042885. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Brian Thielen works

Medicare's Facility Affiliation Data lists Brian Thielen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Brian Thielen is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Brian Thielen as a member of these groups (CMS data updated 2026-10-02).

  • Kalispell Regional Medical Center Inc421 clinicians in the group
  • St Johns Lutheran Hospital Inc34 clinicians in the group
  • Sound Physicians of Hawaii Inc18 clinicians in the group

Specialties

Find other Family Practice doctors in Montana →

Other family doctors in Kalispell

Clinicians with the same Medicare primary specialty in Kalispell, MT — not a recommendation.

All family doctors in Kalispell →

Clinician information

CredentialMD
Medical schoolUniversity Of Minnesota Medical School
Graduation year2021
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1568042885
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians