JOHN G. GANCAYCO (M.D.) – Gastroenterology Physician, NPI 1609089390
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,498 GASTROENTEROLOGY in TX
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Provider Addresses for JOHN G. GANCAYCO (M.D.)
Center for the Intrepid, 3551, Roger Brooke Drive, San Antonio, Bexar County, Texas, 78234, United States
SAN ANTONIO, TX 782344504
Phone: (210) 916-4367
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $125.
Total Amount is formed as General ($125) + Research ($0) + Ownership ($0) = $125.
Last reported payment date: 2024-12-06 • Largest payer in this snapshot: Phathom Pharmaceuticals, Inc. ($125).
Total Amount
$125
General + Research + Ownership
Payments
1
Total payment records
General Amount
$125
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-06
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Phathom Pharmaceuticals, Inc. | $125 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2019-01-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20170830000507 | I | Gastroenterology | TX | TBD |
| I20190114001660 | I | Gastroenterology | MT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 59 | 42 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 20 | 20 | $0 |
Insurance plans in this area (ZIP 78234)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | TX | |
| Gastroenterology, Internal Medicine | TX | |
| Nurse Practitioner | TX | |
| Internal Medicine, Gastroenterology | TX | |
| G A S T R O E N T E R O L O G Y | TX | |
| Gastroenterology, Internal Medicine | TX | |
| G A S T R O E N T E R O L O G Y | TX | |
| G A S T R O E N T E R O L O G Y | TX | |
| G A S T R O E N T E R O L O G Y | LA | |
| Gastroenterology, Internal Medicine | TX |
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