Dennis Y. Chan, M. D.
Gastroenterology Physician · Monterey Park, CA
Dennis Y. Chan, M. D. is a gastroenterology physician with a practice address in Monterey Park, California, and NPI 1053343434, issued on Jul 7, 2006. Check the license (California A43296, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Dennis Y. Chan
- Credential
- M. D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A43296 CA
Self-reported in NPPES; status is on the state search - Practice location
- 500 N Garfield Ave, Monterey Park, CA 91754
- Phone
- (626) 280-3225
- Enumerated
- Jul 7, 2006
- Record last updated
- Mar 3, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (626) 280-4222
- Medicaid ID
- 00A432961 CA
- Medicare enrollment
- Enrolled (PECOS I20101022000014); 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 500 N Garfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Chan, M.D.Obstetrics & Gynecology Physician1326105743
- Suisun Chan, M.D.Gastroenterology Physician1801815527
- Tsang-Hung Chang, M.D.Obstetrics & Gynecology Physician1801857859
- Edward Chen, M.D.Obstetrics & Gynecology Physician1164463345
- Jeffrey Chen, D.O.Critical Care Medicine (Internal Medicine) Physician1801120191
- Stephen Chen, MDCritical Care Medicine (Internal Medicine) Physician1205821477
Verify Dennis Y. Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A43296Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% more Medicare Part D claims than the average gastroenterology physician in 2024
1,111 Medicare Part D claims for 494 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Pantoprazole Sodium280 claims
- Gavilyte-G216 claims
- Tenofovir Disoproxil Fumarate102 claims
- Vemlidy98 claims
- Peg-3350 And Electrolytes53 claims
- Omeprazole45 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: $847.46
13 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. 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
- Global Gastroenterology Group IncMonterey Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dennis Y. Chan among 2,140 gastroenterology physician records in California
Dennis Y. Chan, 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1980 · median 2002 among the 1,538 with a school on file
- Record last updated2015 · 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).
10 gastroenterology physician records list a practice address in Monterey Park
They are 10 of the 948 NPPES records with a practice address in Monterey Park, and 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Monterey Park → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Suisun Chan, M.D.Monterey Park, CA 917541801815527
- Kwok Leung Chung, M.D.Monterey Park, CA 917541760490627
- Firmin Ho, M.D.Monterey Park, CA 917541497746960
- Chun Hsu, M.D.Monterey Park, CA 917541902831894
- Fernando Ibarra, MDMonterey Park, CA 917541013082726
- Chia Chi Lai, M.D.Monterey Park, CA 917541043238413
- Yang Liu, M.D.Monterey Park, CA 917541033430913
- Shih-Lin Lue, M.D.Monterey Park, CA 917541992895346
Common questions
What is Dennis Y. Chan, M. D.'s NPI number?
Dennis Y. Chan, M. D.'s National Provider Identifier (NPI) is 1053343434, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dennis Y. Chan, M. D. located?
The NPPES record lists a practice address at 500 N Garfield Ave, Monterey Park, CA, 91754. Phone: (626) 280-3225. Providers update this record themselves, so call before visiting.
How can I verify Dennis Y. Chan, M. D.'s license?
NPPES lists California license number A43296, 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 Dennis Y. Chan, M. D. prescribe under Medicare Part D?
In 2024, Dennis Y. Chan, M. D. had 1,111 Medicare Part D claims for 494 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.