John J. Duque, M.D.
Gastroenterology Physician · Chula Vista, CA
John J. Duque, M.D. is a gastroenterology physician with a practice address in Chula Vista, California, and NPI 1295710747, issued on Dec 7, 2005. Check the license (California G48442, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John J. Duque
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G48442 CA
Self-reported in NPPES; status is on the state search - Practice location
- 480 4TH Ave, Chula Vista, CA 91910
- Phone
- (619) 691-0240
- Enumerated
- Dec 7, 2005
- Record last updated
- Nov 25, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (619) 691-8804
- Medicaid ID
- 00G484420 CA
- Medicare enrollment
- Enrolled (PECOS I20090422000614); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 480 4TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jennifer Crittenden, D.P.TPhysical Therapist1700138732
- William Eves, MDOrthopaedic Surgery Physician1588664049
Verify John J. Duque in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G48442Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average gastroenterology physician in 2024
1,084 Medicare Part D claims for 763 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Gavilyte-C463 claims
- Clenpiq181 claims
- Omeprazole87 claims
- Amoxicillin68 claims
- Sucralfate68 claims
- Rifabutin64 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: $102.80
5 payments; by number, the most common kind was food and beverage; the largest payer was Evoke Pharma, 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.
John J. Duque among 2,140 gastroenterology physician records in California
John J. Duque, 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 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
- Graduated1981 · median 2002 among the 1,538 with a school on file
- Record last updated2013 · 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 Chula Vista → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Erick Alayo, M.D.Chula Vista, CA 919101841454758
- Ivan Cubas, MDChula Vista, CA 919101447464912
- Mark Johnson, M.D.Chula Vista, CA 919101861421372
- Gregory Wiener, M.DChula Vista, CA 919101811099534
- Steven Brozinsky, M.D.Chula Vista, CA 919111649266834
- Errol Korn, M.D.Chula Vista, CA 919111922041052
- Edward Singer, M.D.Chula Vista, CA 919111679569743
- Mohammad Soleimanpour, M.D.La Mesa, CA 919411194714527
Common questions
What is John J. Duque, M.D.'s NPI number?
John J. Duque, M.D.'s National Provider Identifier (NPI) is 1295710747, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John J. Duque, M.D. located?
The NPPES record lists a practice address at 480 4TH Ave, Chula Vista, CA, 91910. Phone: (619) 691-0240. Providers update this record themselves, so call before visiting.
How can I verify John J. Duque, M.D.'s license?
NPPES lists California license number G48442, 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 John J. Duque, M.D. prescribe under Medicare Part D?
In 2024, John J. Duque, M.D. had 1,084 Medicare Part D claims for 763 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.