DR. SAMUEL JOHN FESENMEIER DO
NPI 1952860587
Psychiatry & Neurology - Psychiatry in Irvine, CA
About Dr. Samuel John Fesenmeier Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SAMUEL JOHN FESENMEIER DO (NPI 1952860587) is an individual psychiatry provider in Irvine, California, licensed in California (20A24295) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fort Irwin, and is a graduate of Marian University College Of Osteopathic Medicine (2019).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Samuel John Fesenmeier Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Samuel Fesenmeier reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Duarte, CA 91010
- Reassigned Medicare billing, California enrollment
- 1,335 clinicians in this Medicare group
Mammoth Lakes, CA 93546
- Reassigned Medicare billing, California enrollment
- 113 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
IRVINE, CA 92618
IRVINE, CA 92618
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Samuel Fesenmeier's NPI number?
The NPI number for Samuel Fesenmeier is 1952860587. It was assigned to this individual provider in the NPPES registry on March 13, 2019.
Where is Samuel Fesenmeier located?
Samuel Fesenmeier practices at 1000 Fivepoint, Irvine, CA 92618. The listed phone number is (800) 826-4673.
What is Samuel Fesenmeier's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Samuel Fesenmeier enrolled in Medicare?
Yes. Samuel Fesenmeier is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Samuel Fesenmeier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Samuel Fesenmeier reassigns Medicare benefits to 2 organizations: City Of Hope Medical Foundation (Duarte, CA) and Southern Mono Health Care District (Mammoth Lakes, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Samuel Fesenmeier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Samuel Fesenmeier was last updated on July 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Samuel John Fesenmeier, DO · NPI 1952860587
Psychiatry physician in Irvine, California. Individual provider, active in the CMS NPPES registry since March 13, 2019.
## Identity
- **NPI:** 1952860587 (Entity type: Individual)
- **Enumerated:** March 13, 2019
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 20A24295 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 FIVEPOINT, Irvine, CA 92618-2377
- **Phone:** (800) 826-4673
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): City Of Hope Medical Foundation (NPI 1871886366, Duarte, CA); Southern Mono Health Care District (NPI 1962444059, Mammoth Lakes, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Marian University College Of Osteopathic Medicine, class of 2019
## Record status
- **NPPES last updated:** July 8, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1952860587) · Data from the CMS NPPES public registry.