GREGORY L. SHANNON (M.D.) – Gastroenterology Physician, NPI 1730148495
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
13,290 INTERNAL MEDICINE in TX
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Provider Addresses for GREGORY L. SHANNON (M.D.)
West Grand Parkway South, Sugar Land, Fort Bend County, Texas, 77479, United States
#220
SUGAR LAND, TX 774792645
Phone: (281) 201-1338
Fax: (281) 201-1353
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 132 Open Payments records for all available years, with a total value of $3,618.
Total Amount is formed as General ($2,758) + Research ($860) + Ownership ($0) = $3,618.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: Eli Lilly and Company ($860).
Total Amount
$3,618
General + Research + Ownership
Payments
132
Total payment records
General Amount
$2,758
General payments
Research Amount
$860
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2004-09-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20040903000931 | I | Internal Medicine | TX | 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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 1,204 | 226 | $0 |
| 88312 | Special stained specimen slides to identify organisms including interpretation and report | 458 | 83 | $0 |
| 88313 | Special stained specimen slides to examine tissue including interpretation and report | 421 | 82 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 229 | 227 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 113 | 110 | $0 |
Insurance plans in this area (ZIP 77479)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Registered Dietitian Or Nutrition Professional | TX | |
| Nurse Practitioner | TX | |
| G A S T R O E N T E R O L O G Y | FL | |
| Nurse Practitioner | 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 | 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 |
Reviews
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