Katherine Nguyen, M.D.
Gastroenterology Physician · Houston, TX
Katherine Nguyen, M.D. is a gastroenterology physician with a practice address in Houston, Texas, and NPI 1083881916, issued on May 9, 2008. Check the license (Texas L8453, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Nguyen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- L8453 TX
Self-reported in NPPES; status is on the state search - Practice location
- 915 Gessner Road, Houston, TX 77024
- Phone
- (713) 461-1026
- Enumerated
- May 9, 2008
- Record last updated
- Feb 11, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (713) 461-4358
- Medicare enrollment
- Enrolled (PECOS I20040806001096); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,478 in Texas → Look up another NPI →
Also registered at 915 Gessner Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Miranda Cullins, REGISTERED NURSEInfusion Therapy Registered Nurse1801156872
Verify Katherine Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L8453Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average gastroenterology physician in 2024
594 Medicare Part D claims for 199 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Pantoprazole Sodium223 claims
- Omeprazole91 claims
- Sod Sulf-Potass Sulf-Mag Sulf68 claims
- Dicyclomine Hcl27 claims
- Famotidine26 claims
- Esomeprazole Magnesium19 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: $241.68
8 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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
- Digestive And Liver SpecialistsHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Nguyen among 1,478 gastroenterology physician records in Texas
Katherine Nguyen, M.D. is one of 1,478 gastroenterology physician records with a practice address in Texas. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 36% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2001 · median 2003 among the 1,175 with a school on file
- Record last updated2014 · 53% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Texas
There are 1,478 gastroenterology physician records in Texas.
All 1,478 in Texas → Every provider in Houston → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jaspaul Azad, M.D.Houston, TX 770241972719862
- Cristian Dominguez, M.D.Houston, TX 770241134482219
- Ira FlaxHouston, TX 770241366419954
- Robert HermanHouston, TX 770241528171808
- Hashim Khandwalla, M.D.Houston, TX 770241891735288
- Kevin Kline, MDHouston, TX 770241134575699
- Paul MaukHouston, TX 770241568437531
- Gowrappala Ramesh, M.D.Houston, TX 770241053377051
Common questions
What is Katherine Nguyen, M.D.'s NPI number?
Katherine Nguyen, M.D.'s National Provider Identifier (NPI) is 1083881916, issued on May 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Nguyen, M.D. located?
The NPPES record lists a practice address at 915 Gessner Road, Houston, TX, 77024. Phone: (713) 461-1026. Providers update this record themselves, so call before visiting.
How can I verify Katherine Nguyen, M.D.'s license?
NPPES lists Texas license number L8453, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Katherine Nguyen, M.D. had 594 Medicare Part D claims for 199 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.