Samuel John Fesenmeier, DO
Psychiatry Physician · Irvine, CA
Samuel John Fesenmeier, DO is a psychiatry physician with a practice address in Irvine, California, and NPI 1952860587, issued on Mar 13, 2019. Check the license (California 20A24295, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Samuel John Fesenmeier
- Credential
- DO
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 20A24295 CA
DOS-2139 HI
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Fivepoint, Irvine, CA 92618
- Phone
- (800) 826-4673
- Enumerated
- Mar 13, 2019
- Record last updated
- Jul 8, 2026
- Medicare enrollment
- Enrolled (PECOS I20260216002122); accepts Medicare assignment
- Medical or professional school
- Marian University College Of Osteopathic Medicine, 2019
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1000 Fivepoint
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Alessi, PA-CPhysician Assistant1962711838
- Tara Anderson, PA-CPhysician Assistant1770058349
- Aubree Ashdown, PA-CPhysician Assistant1679244503
- Ghazal Bahri, M.D.Hospitalist Physician1770013146
- Meg Camille Baldonado, FNP-CFamily Nurse Practitioner1346602604
- Joseph Barrera, FNPFamily Nurse Practitioner1306289491
Verify Samuel John Fesenmeier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A24295Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Southern Mono Health Care DistrictMammoth Lakes, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Samuel John Fesenmeier among 8,673 psychiatry physician records in California
Samuel John Fesenmeier, DO is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 13% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2019 · median 2005 among the 3,295 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 psychiatry physician records list a practice address in Irvine
They are 54 of the 7,778 NPPES records with a practice address in Irvine, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Irvine → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Kamal Artin, M.D.Irvine, CA 926181285876813
- Amy BloodIrvine, CA 926181003208570
- Harold Boerlin, M.D.Irvine, CA 926181043441090
- Ravindra Chand, M.D.Irvine, CA 926181013099951
- Emily Johnson, M.D.Irvine, CA 926181063590438
- Aaron Neustadt, M.D.Irvine, CA 926181295980605
- Amelia Russo-Neustadt, M.D., PH.D.Irvine, CA 926181003268020
- Alejandra Suzuki, M.D.Irvine, CA 926181730213497
Common questions
What is Samuel John Fesenmeier, DO's NPI number?
Samuel John Fesenmeier, DO's National Provider Identifier (NPI) is 1952860587, issued on Mar 13, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Samuel John Fesenmeier, DO located?
The NPPES record lists a practice address at 1000 Fivepoint, Irvine, CA, 92618. Phone: (800) 826-4673. Providers update this record themselves, so call before visiting.
How can I verify Samuel John Fesenmeier, DO's license?
NPPES lists California license number 20A24295, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.