John G. Gancayco, M.D.
Gastroenterology Physician · Jbsa Ft Sam Houston, TX
John G. Gancayco, M.D. is a gastroenterology physician with a practice address in Jbsa Ft Sam Houston, Texas, and NPI 1609089390, issued on May 8, 2007. Check the license (Texas R1954, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John G. Gancayco
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- R1954 TX
0101241245 VA
Self-reported in NPPES; status is on the state search - Practice location
- 3551 Roger Brooke Dr, Jbsa Ft Sam Houston, TX 78234
- Phone
- (210) 916-2338
- Enumerated
- May 8, 2007
- Record last updated
- Jan 17, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 375517502 TX
- Medicare enrollment
- Enrolled (PECOS I20170830000507); accepts Medicare assignment
- Medical or professional school
- Uniformed Services Uhs Fe Hebert School Of Med, 2005
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,478 in Texas → Look up another NPI →
Also registered at 3551 Roger Brooke Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Abbott, APRN-FNPFamily Nurse Practitioner1114293784
- Bret Ackermann, DOEmergency Medicine Physician1316010747
- Jason AdamsOtology & Neurotology Physician1487155578
- Esteban Aguirre, DNP, APRN, AGACNP-BCNurse Practitioner1255883799
- Omojolaade Akintade, MD, MSCRMilitary Health Care Provider1659047785
- Jordyn Albert, MDMilitary Health Care Provider1003757394
Verify John G. Gancayco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R1954Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $124.98
1 payment: food and beverage; the largest payer was Phathom Pharmaceuticals, 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
- Texas Digestive Disease Consultants, PLLCFlower Mound, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John G. Gancayco among 1,478 gastroenterology physician records in Texas
John G. Gancayco, 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 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 41% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2005 · median 2003 among the 1,175 with a school on file
- Record last updated2020 · 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).
5 gastroenterology physician records list a practice address in Jbsa Ft Sam Houston
They are 5 of the 669 NPPES records with a practice address in Jbsa Ft Sam Houston, and 1,478 gastroenterology physician records in Texas.
All 1,478 in Texas → Every provider in Jbsa Ft Sam Houston → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Carlos Angueira, MDFort Sam Houston, TX 782341639168057
- Christina Awad, M.D.Jbsa Ft Sam Houston, TX 782341023404803
- Adrian Barron, M.D.San Antonio, TX 782341164734745
- Xiaolu Carter, D.OFort Sam Houston, TX 782341306984059
- David Dulaney, MDJbsa Ft Sam Houston, TX 782341427443456
- Noah Hall, M.D.Fort Sam Houston, TX 782341396056172
- Johanna Hollweg, D.O.Jbsa Ft Sam Houston, TX 782341871856757
- Andrew Mertz, MDFort Sam Houston, TX 782341063948115
Common questions
What is John G. Gancayco, M.D.'s NPI number?
John G. Gancayco, M.D.'s National Provider Identifier (NPI) is 1609089390, issued on May 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John G. Gancayco, M.D. located?
The NPPES record lists a practice address at 3551 Roger Brooke Dr, Jbsa Ft Sam Houston, TX, 78234. Phone: (210) 916-2338. Providers update this record themselves, so call before visiting.
How can I verify John G. Gancayco, M.D.'s license?
NPPES lists Texas license number R1954, 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.
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.