Doctor profile · Federal record
Dr. John Gancayco, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Internal Medicine Physician · Jbsa Ft Sam Houston, TX
- NPI 1609089390
- Accepts Medicare
- 21 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3551 Roger Brooke Dr
Jbsa Ft Sam Houston, TX 78234
(210) 916-2338
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- January 17, 2020
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Texas #R1954 · Virginia #0101241245
- Medicaid
- TX #375517502
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1609089390. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
79
Distinct HCPCS
2
Medicare allowed
$6,935
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 59 | 42 | $75 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 20 | 20 | $125 |
In context: peer comparison
Among 1 peers in Jbsa Ft Sam Houston Gastroenterology Physician, average services per provider: 39. This provider delivers 2.0× the peer median.Open Payments
Industry payments received
All-time total
$125
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Phathom Pharmaceuticals, INC. | 1 | $124.98 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
12
Total drug cost
$298
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 12 | 12 | $298 |
Hospital affiliations
Frequently asked questions
What is Dr. John Gancayco's medical specialty?
Dr. John Gancayco practices Gastroenterology Physician in Jbsa Ft Sam Houston, TX.
Where does Dr. John Gancayco practice?
Dr. John Gancayco practices at 3551 Roger Brooke Dr, Jbsa Ft Sam Houston, TX 78234. Office phone: 2109162338.
What is Dr. John Gancayco's NPI?
Dr. John Gancayco's National Provider Identifier (NPI) is 1609089390, issued by NPPES.
Does Dr. John Gancayco accept Medicare assignment?
Yes. Dr. John Gancayco accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Gancayco commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.