Teresita Belen Yap Gan, MD
Family Medicine Physician · West Covina, CA
Teresita Belen Yap Gan, MD is a family medicine physician with a practice address in West Covina, California, and NPI 1114028727, issued on Sep 26, 2006. Check the license (California A036156, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Teresita Belen Yap Gan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A036156 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1433 W Merced, West Covina, CA 91790
- Phone
- (626) 960-4989
- Enumerated
- Sep 26, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (626) 960-5520
- Medicaid ID
- GR0013850 CA
- Medicare enrollment
- Enrolled (PECOS I20090914000703); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Teresita Belen Yap Gan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A036156Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average family medicine physician in 2024
967 Medicare Part D claims for 157 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate103 claims
- Atorvastatin Calcium67 claims
- Metformin Hcl66 claims
- Rosuvastatin Calcium53 claims
- Losartan Potassium48 claims
- Irbesartan47 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: $562.61
18 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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 2 group practices
- Cua And Gan Medical CorporationWest Covina, CA
- Cua, Gan And Bien Medical CorporationWest Covina, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Teresita Belen Yap Gan among 17,133 family medicine physician records in California
Teresita Belen Yap Gan, MD is one of 17,133 family 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1972 · median 2005 among the 10,652 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
69 family medicine physician records list a practice address in West Covina
They are 69 of the 2,450 NPPES records with a practice address in West Covina, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in West Covina → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Fe Advincula, M.D.West Covina, CA 917901235162272
- Melody Angeles-Riparip, M.D.West Covina, CA 917901093752248
- Van Duong, M.D.West Covina, CA 917901497705289
- John Koumas, D.O.West Covina, CA 917901134111958
- Zaida Obeso, M.D.West Covina, CA 917901881790616
- Jose Pilpa, MDWest Covina, CA 917901760439012
- Adriana Pollak Lazzaro, DOWest Covina, CA 917901306923974
- Elise Pomerance, M.D.West Covina, CA 917901568569606
Common questions
What is Teresita Belen Yap Gan, MD's NPI number?
Teresita Belen Yap Gan, MD's National Provider Identifier (NPI) is 1114028727, issued on Sep 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Teresita Belen Yap Gan, MD located?
The NPPES record lists a practice address at 1433 W Merced, West Covina, CA, 91790. Phone: (626) 960-4989. Providers update this record themselves, so call before visiting.
How can I verify Teresita Belen Yap Gan, MD's license?
NPPES lists California license number A036156, 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 Teresita Belen Yap Gan, MD prescribe under Medicare Part D?
In 2024, Teresita Belen Yap Gan, MD had 967 Medicare Part D claims for 157 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.