Quang Quoc Phan, M.D.
Gastroenterology Physician · Garden Grove, CA
Quang Quoc Phan, M.D. is a gastroenterology physician with a practice address in Garden Grove, California, and NPI 1982698957, issued on Sep 7, 2005. Check the license (California A44365, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Quang Quoc Phan
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A44365 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12665 Garden Grove Blvd, Garden Grove, CA 92843
- Phone
- (714) 537-5302
- Enumerated
- Sep 7, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 537-0592
- Medicaid ID
- 00A443651 CA
- Medicare enrollment
- Enrolled (PECOS I20100928000773); accepts Medicare assignment
- Medical or professional school
- University Of Mississippi School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 12665 Garden Grove Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- James Boyce, M.D.Ophthalmology Physician1457351652
- Allen Chou, MDGeriatric Medicine (Internal Medicine) Physician1215919915
- Douglas Clark, M.D.Internal Medicine Physician1780688572
- Naveen Dhar, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1871604116
- Usha Dhar, M.D.Family Medicine Physician1699886846
Verify Quang Quoc Phan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A44365Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average gastroenterology physician in 2024
2,213 Medicare Part D claims for 984 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Vemlidy630 claims
- Sod Sulf-Potass Sulf-Mag Sulf366 claims
- Gavilyte-G228 claims
- Entecavir197 claims
- Tenofovir Disoproxil Fumarate92 claims
- Peg-3350 And Electrolytes69 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: $11,822.88
36 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.
Quang Quoc Phan among 2,140 gastroenterology physician records in California
Quang Quoc Phan, 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
- Graduated1986 · median 2002 among the 1,538 with a school on file
- Record last updated2007 · 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 Garden Grove → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Omid Shaye, M.D.Garden Grove, CA 928451720267990
- Syam Gaddam, MDGarden Grove, CA 928401275510711
- Martin Carr, M.D.Fullerton, CA 928351326034265
- Patrick Koo, MDFullerton, CA 928351801152772
- Sajen Mathews, MDFullerton, CA 928351326048323
- Yeeshun Miao, M.D.Fullerton, CA 928351518953983
- Kumkum Patel, M.D., MPHFullerton, CA 928351003178138
- Vijay Prabhakar, M.D.Fullerton, CA 928351932593167
Common questions
What is Quang Quoc Phan, M.D.'s NPI number?
Quang Quoc Phan, M.D.'s National Provider Identifier (NPI) is 1982698957, issued on Sep 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Quang Quoc Phan, M.D. located?
The NPPES record lists a practice address at 12665 Garden Grove Blvd, Garden Grove, CA, 92843. Phone: (714) 537-5302. Providers update this record themselves, so call before visiting.
How can I verify Quang Quoc Phan, M.D.'s license?
NPPES lists California license number A44365, 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 Quang Quoc Phan, M.D. prescribe under Medicare Part D?
In 2024, Quang Quoc Phan, M.D. had 2,213 Medicare Part D claims for 984 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.