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Edit this profileAt a glance
- 3551 Roger Brooke Dr, Jbsa Fort Sam Houston, TX 78234
About Dr. Gancayco
John G. Gancayco, M.D. is a healthcare provider in Jbsa Fort Sam Houston, TX specializing in gastroenterology. John trained at Uniformed Services Uhs Fe Hebert School of Med, graduating in 2005. John is also listed as specializing in internal medicine. According to Medicare claims data, John cared for 62 Medicare patients across 72 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes and initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes. This provider record is associated with NPI 1609089390.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (210) 916-2338
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
3551 ROGER BROOKE DR
Jbsa Fort Sam Houston, TX 78234
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Chronic conditions
- Cystic Fibrosis Malabsorption
Liver health
- Cirrhosis of the Liver
Specialized and cancer
- Short bowel syndrome
Wound care
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
- Acute pancreatitis
- Gallstones
- Pancreatic cysts
- Primary sclerosing cholangitis
Colon and anorectal
Esophagus and swallowing
- Barrett's esophagus
- Eosinophilic esophagitis
- Esophageal stricture
- Esophagitis
Functional bowel and motility
- Chronic diarrhea
- Fecal incontinence
- Small intestinal bacterial overgrowth
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
- Functional dyspepsia
- Gastritis
- Gastroparesis
- H. pylori infection
- Peptic ulcer disease
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
- Blocked Bile Duct
Procedures & services
Advanced endoscopy
- EUS-guided biopsy
Biliary and pancreatic endoscopy
- Biliary sphincterotomy
- Endoscopic bile duct stone removal
Capsule and physiology testing
- Ambulatory reflux monitoring
- Capsule endoscopy
- Hydrogen and methane breath testing
- Anorectal manometry
- Esophageal manometry
Chronic illness
- Feeding tube care and troubleshooting
Clinical Nutrition
- IV Nutrition Support
Diagnostic Testing
- 24-Hour Acid Reflux Test
- H. Pylori Breath Test
- SIBO Breath Test
- EUS-Guided Fine Needle Biopsy
Digestive
- Bowel Retraining Program
General surgery
Infection & Microbiology Tests
Liver procedures
- Paracentesis
- Esophageal variceal banding
- Liver elastography
Lower endoscopy
- Colon polyp removal
- Diagnostic colonoscopy
- Endoscopic control of gastrointestinal bleeding
- Flexible sigmoidoscopy
Nursing care
Nutrition & Digestion
Upper endoscopy
- Endoscopic mucosal resection
- Esophageal biopsy
- Esophageal dilation
- Stomach biopsy
- Endoscopic submucosal dissection
Most searched procedures
- Colonoscopy
- Endoscopy
- Gallbladder removal
- Hernia repair
- Liver biopsy
Treatments
Procedures Most Often Billed to Medicare
72 services · 62 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
40 | As often as other peers in Gastroenterology |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
32 | As often as other peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 19 related providers in 3 groups
Other gastroenterologists in Jbsa Fort Sam Houston 3
Same specialty, same city.
Trained at Uniformed Services Uhs Fe Hebert School of Med 8
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Uniformed Services Uhs Fe Hebert School of Med 8
Providers who graduated from the same medical school in the same year.
Common questions
What is John G. Gancayco's specialty?
John G. Gancayco is a gastroenterologist in Jbsa Fort Sam Houston, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find John G. Gancayco?
John G. Gancayco is listed at 3551 Roger Brooke Dr, Jbsa Fort Sam Houston, TX 78234. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact John G. Gancayco?
The number on file is (210) 916-2338. Contact the office directly to confirm availability and scheduling.
NPI registry
What is John G. Gancayco's NPI number?
John G. Gancayco's National Provider Identifier is 1609089390. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is John G. Gancayco's education?
John G. Gancayco attended Uniformed Services Uhs Fe Hebert School of Med, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has John G. Gancayco been practicing?
John G. Gancayco has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What is John G. Gancayco known for?
According to Medicare billing data, John G. Gancayco the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John G. Gancayco confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John G. Gancayco. If this is you, claiming it is free.
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