Evan Mosier, M.D.
Gastroenterology Physician · Duarte, CA
Evan Mosier, M.D. is a gastroenterology physician with a practice address in Duarte, California, and NPI 1598152365, issued on Apr 20, 2015. Check the license (California A144776, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Evan Mosier
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A144776 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Duarte RD, Duarte, CA 91010
- Phone
- (800) 826-4673
- Enumerated
- Apr 20, 2015
- Record last updated
- Oct 23, 2024
- Medicare enrollment
- Enrolled (PECOS I20210812003514); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 1500 Duarte RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Vaibhav Agrawal, M.D.Hematology & Oncology Physician1538402565
Verify Evan Mosier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A144776Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average gastroenterology physician in 2024
548 Medicare Part D claims for 378 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Gavilyte-C314 claims
- Omeprazole48 claims
- Pantoprazole Sodium32 claims
- Amjevita(Cf) Autoinjector13 claims
- Dicyclomine Hcl13 claims
- Budesonide Dr12 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 one group practice
- City OF Hope Medical FoundationDuarte, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Evan Mosier among 2,140 gastroenterology physician records in California
Evan Mosier, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 85% of them.
- NPI issued2015 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2015 · median 2002 among the 1,538 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Duarte → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Aileen Bui, MDDuarte, CA 910101639673478
- Donald David, MDDuarte, CA 910101588767131
- Jeremiah Donovan, MDDuarte, CA 910101164406500
- Victoria Green, MDDuarte, CA 910101184251712
- Gregory Idos, M.D.Duarte, CA 910101770769937
- Aung Kaung, M.DDuarte, CA 910101285992644
- Trilokesh Kidambi, MDDuarte, CA 910101679849574
- James Lin, MDDuarte, CA 910101770743502
Common questions
What is Evan Mosier, M.D.'s NPI number?
Evan Mosier, M.D.'s National Provider Identifier (NPI) is 1598152365, issued on Apr 20, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Evan Mosier, M.D. located?
The NPPES record lists a practice address at 1500 Duarte RD, Duarte, CA, 91010. Phone: (800) 826-4673. Providers update this record themselves, so call before visiting.
How can I verify Evan Mosier, M.D.'s license?
NPPES lists California license number A144776, 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 Evan Mosier, M.D. prescribe under Medicare Part D?
In 2024, Evan Mosier, M.D. had 548 Medicare Part D claims for 378 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.