DR. GREGORY BRENNAN (M.D.) – Gastroenterology Physician, NPI 1689017105
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,498 GASTROENTEROLOGY in TX
Provider Addresses for DR. GREGORY BRENNAN (M.D.)
PO BOX 35629
DALLAS, TX 752350629
Phone: (214) 424-2213
Type: Mailing
647 N MILLER RD STE B
MANSFIELD, TX 760636180
Phone: (817) 760-7969
Fax: (817) 760-7976
Type: Location
820 HIGHWAY 287 N STE 308
MANSFIELD, TX 76063
Phone:
Type: Mailing
920 HIGHWAY 287 N STE 308
MANSFIELD, TX 760632632
Phone: (817) 760-7969
Fax: (817) 760-7976
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 177 Open Payments records for all available years, with a total value of $3,213.
Total Amount is formed as General ($3,213) + Research ($0) + Ownership ($0) = $3,213.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: ABBVIE INC. ($754).
Total Amount
$3,213
General + Research + Ownership
Payments
177
Total payment records
General Amount
$3,213
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
2
Ownership records
Last Payment Date
2024-12-12
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: 2019-07-29
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 |
|---|---|---|---|---|
| I20190729000813 | I | Gastroenterology | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 70 | 62 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 64 | 57 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 62 | 60 | $0 |
| 43235 | Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 46 | 45 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 42 | 42 | $0 |
Insurance plans in this area (ZIP 75235)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | TX | |
| Nurse Practitioner | TX | |
| Gastroenterology, Internal Medicine | ND | |
| Internal Medicine, Gastroenterology | 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 | LA | |
| G A S T R O E N T E R O L O G Y | TX | |
| Gastroenterology, Internal Medicine | TX |
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