Quick answers
- Where does Samuel J. Mast see patients?
- Medicare's clinician data lists 1 practice location in Fort Collins, CO. Call before your visit to confirm the address.
- What is Samuel J. Mast's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Samuel J. Mast accept Medicare assignment?
- Yes. Medicare's clinician data says Samuel J. Mast 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 Samuel J. Mast?
- (303) 338-4545, as listed in official Medicare / NPI Registry data.
- What is Samuel J. Mast's NPI number?
- 1780970426. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Samuel J. Mast is enrolled with Medicare (CMS data updated 2026-10-02).
- 2950 E Harmony Rd, Kaiser Permanente Fort Collins MedFort Collins, CO 80528 (303) 338‑4545
Group practices
Medicare enrollment lists Samuel J. Mast as a member of this group (CMS data updated 2026-10-02).
- Colorado Permanente Medical Group PC1,327 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Fort Collins
Clinicians with the same Medicare primary specialty in Fort Collins, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780970426 |
| 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
- 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