Sarah Koser
Emergency Medicine Physician · Fresno, CA
Sarah Koser is an emergency medicine physician with a practice address in Fresno, California, and NPI 1184251225, issued on Mar 26, 2020. Check the license (California A191127, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sarah Koser
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A191127 CA
Self-reported in NPPES; status is on the state search - Practice location
- 155 N Fresno St, Fresno, CA 93701
- Phone
- (559) 499-6440
- Enumerated
- Mar 26, 2020
- Record last updated
- Jun 20, 2024
- Medicare enrollment
- Enrolled (PECOS I20231013002535); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 155 N Fresno St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Waleed AbdelfattahStudent in an Organized Health Care Education/Training Program1982544359
- Khaled Mohammed Abdullah, MBBSStudent in an Organized Health Care Education/Training Program1003552472
- Mohammad Abidali, MDStudent in an Organized Health Care Education/Training Program1174383764
- Charlie Abraham, MDSleep Medicine (Internal Medicine) Physician1588841043
- Luke Adams, MDStudent in an Organized Health Care Education/Training Program1497458855
- Yasmeen Afridi, DOStudent in an Organized Health Care Education/Training Program1548964489
Verify Sarah Koser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A191127Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average emergency medicine physician in 2024
79 Medicare Part D claims for 57 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Central California Faculty Medical Group IncFresno, CA
- Cep America - CaliforniaClovis, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sarah Koser among 7,751 emergency medicine physician records in California
Sarah Koser is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 88% of them.
- NPI issued2020 · 88% of these records are older, 8% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2020 · median 2011 among the 4,560 with a school on file
- Record last updated2024 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
228 emergency medicine physician records list a practice address in Fresno
They are 228 of the 19,440 NPPES records with a practice address in Fresno, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fresno → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Deena Bengiamin, M.DFresno, CA 937011174848444
- Sara Caldwell, M.D.Fresno, CA 937011972731990
- Michael Cawdery, MDFresno, CA 937011295735538
- Quetzalsol Chacon-Lopez, M.D., M.P.H.Fresno, CA 937011295979425
- Kira EandiFresno, CA 937011184858896
- Leticia Escoto, MDFresno, CA 937011649387309
- David Hakkarinen, M.D.Fresno, CA 937011659601284
- Luc Hibbs, MDFresno, CA 937011124342753
Common questions
What is Sarah Koser's NPI number?
Sarah Koser's National Provider Identifier (NPI) is 1184251225, issued on Mar 26, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Koser located?
The NPPES record lists a practice address at 155 N Fresno St, Fresno, CA, 93701. Phone: (559) 499-6440. Providers update this record themselves, so call before visiting.
How can I verify Sarah Koser's license?
NPPES lists California license number A191127, 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.
How much does Sarah Koser prescribe under Medicare Part D?
In 2024, Sarah Koser had 79 Medicare Part D claims for 57 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.