Sajen Mathews, MD
Gastroenterology Physician · Fullerton, CA
Sajen Mathews, MD is a gastroenterology physician with a practice address in Fullerton, California, and NPI 1326048323, issued on Aug 1, 2005. Check the license (California A53370, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sajen Mathews
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A53370 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1837 Sunny Crest Dr, Fullerton, CA 92835
- Phone
- (714) 446-5831
- Enumerated
- Aug 1, 2005
- Record last updated
- Oct 22, 2024
- Fax
- (714) 446-7910
- Medicare enrollment
- Enrolled (PECOS I20041008001404); accepts Medicare assignment
- 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 1837 Sunny Crest Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Martin Carr, M.D.Gastroenterology Physician1326034265
- Maica Javien, NP-CFamily Nurse Practitioner1255086443
- Patrick Koo, MDGastroenterology Physician1801152772
- Thu Le, FNPFamily Nurse Practitioner1033698915
- Erica Lee, NPFamily Nurse Practitioner1013506740
- Jill Olmstead, N.P.Nurse Practitioner1740276732
Verify Sajen Mathews in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A53370Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% more Medicare Part D claims than the average gastroenterology physician in 2024
980 Medicare Part D claims for 285 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole229 claims
- Pantoprazole Sodium126 claims
- Nortriptyline Hcl95 claims
- Dicyclomine Hcl51 claims
- Famotidine47 claims
- Diphenoxylate-Atropine43 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.
Industry payments in 2024: $2,381.70
99 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sajen Mathews among 2,140 gastroenterology physician records in California
Sajen Mathews, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1986 · 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 Fullerton → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Martin Carr, M.D.Fullerton, CA 928351326034265
- Patrick Koo, MDFullerton, CA 928351801152772
- Yeeshun Miao, M.D.Fullerton, CA 928351518953983
- Kumkum Patel, M.D., MPHFullerton, CA 928351003178138
- Vijay Prabhakar, M.D.Fullerton, CA 928351932593167
- Scott Sainburg, M.D.Fullerton, CA 928351184610552
- Eugene Yoon, M.D.Fullerton, CA 928351861618449
- Richard McGuire, M.D.Fullerton, CA 928321437196730
Common questions
What is Sajen Mathews, MD's NPI number?
Sajen Mathews, MD's National Provider Identifier (NPI) is 1326048323, issued on Aug 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sajen Mathews, MD located?
The NPPES record lists a practice address at 1837 Sunny Crest Dr, Fullerton, CA, 92835. Phone: (714) 446-5831. Providers update this record themselves, so call before visiting.
How can I verify Sajen Mathews, MD's license?
NPPES lists California license number A53370, 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 Sajen Mathews, MD prescribe under Medicare Part D?
In 2024, Sajen Mathews, MD had 980 Medicare Part D claims for 285 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.