Gregory Nguyenduc, M.D.
Gastroenterology Physician · Chandler, AZ
Gregory Nguyenduc, M.D. is a gastroenterology physician with a practice address in Chandler, Arizona, and NPI 1326016239, issued on Mar 8, 2006. Check the license (Arizona 35213, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Nguyenduc
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 35213 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 600 S Dobson RD Bldg A, Chandler, AZ 85224
- Phone
- (480) 786-6655
- Enumerated
- Mar 8, 2006
- Record last updated
- Feb 10, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 463520 AZ
- Medicare enrollment
- Enrolled (PECOS I20091009000398); accepts Medicare assignment
- Medical or professional school
- University Of South Alabama College Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 403 in Arizona → Look up another NPI →
Also registered at 600 S Dobson RD Bldg A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abraham Panossian, M.D.Gastroenterology Physician1760674295
Verify Gregory Nguyenduc in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 35213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average gastroenterology physician in 2024
690 Medicare Part D claims for 234 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Pantoprazole Sodium335 claims
- Colestipol Hcl27 claims
- Omeprazole27 claims
- Famotidine21 claims
- Linzess20 claims
- Mesalamine20 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: $2,705.17
117 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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
- Arizona Digestive Health PCChandler, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Nguyenduc among 403 gastroenterology physician records in Arizona
Gregory Nguyenduc, M.D. is one of 403 gastroenterology physician records with a practice address in Arizona. 84% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 41% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1998 · median 2001 among the 295 with a school on file
- Record last updated2010 · 47% 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 Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Arizona
There are 403 gastroenterology physician records in Arizona.
All 403 in Arizona → Every provider in Chandler → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Sanjay Ahluwalia, M.D.Chandler, AZ 852241104807882
- Manish Amin, MDChandler, AZ 852241225093271
- George Bracher, M.D.Chandler, AZ 852241669444006
- James Burgess, MDChandler, AZ 852241235118589
- Emma Castillo, M.D.Chandler, AZ 852241598730053
- Brendan Levy, M.D.Chandler, AZ 852241548260474
- Tarun Mullick, M.D.Chandler, AZ 852241912906462
- Sandeep Patel, M.D.Chandler, AZ 852241427094218
Common questions
What is Gregory Nguyenduc, M.D.'s NPI number?
Gregory Nguyenduc, M.D.'s National Provider Identifier (NPI) is 1326016239, issued on Mar 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Nguyenduc, M.D. located?
The NPPES record lists a practice address at 600 S Dobson RD Bldg A, Chandler, AZ, 85224. Phone: (480) 786-6655. Providers update this record themselves, so call before visiting.
How can I verify Gregory Nguyenduc, M.D.'s license?
NPPES lists Arizona license number 35213, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Nguyenduc, M.D. prescribe under Medicare Part D?
In 2024, Gregory Nguyenduc, M.D. had 690 Medicare Part D claims for 234 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.