Quick answers
- Does Samuel J. Fesenmeier accept Medicare assignment?
- Yes. Medicare's clinician data says Samuel J. Fesenmeier 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 Samuel J. Fesenmeier's NPI number?
- 1952860587. 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. Fesenmeier is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 FivepointIrvine, CA 92618 (949) 671‑4673
- PO Box, Suite 660Mammoth Lakes, CA 93546
Group practices
Medicare enrollment lists Samuel J. Fesenmeier as a member of these groups (CMS data updated October 2, 2026).
- City of Hope Medical Foundation982 clinicians in the group
- Southern Mono Health Care District100 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Irvine
Clinicians with the same Medicare primary specialty in Irvine, CA — not a recommendation.
Other clinicians in City of Hope Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Marian University College Of Osteopathic Medicine |
| Graduation year | 2019 (7 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952860587 |
| 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 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