Doctor profile · Federal record
Dr. Gregory Brennan, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Mansfield, TX
- NPI 1689017105
- Accepts Medicare
- MIPS 79.9 / 100 · 2023
- 13 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
647 N Miller RD Ste B
Mansfield, TX 760636180
(817) 760-7969
fax (817) 760-7976 - Mailing address
-
Po Box 35629
Dallas, TX 752350629
Credentials & registration
- NPI registered
- April 2013 — 13 yrs on file
- Profile last updated
- August 25, 2021
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Texas #Q4044
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1689017105. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
468
Distinct HCPCS
10
Medicare allowed
$61,357
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 70 | 62 | $89 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 64 | 57 | $126 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 62 | 60 | $126 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 46 | 45 | $97 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 42 | 42 | $241 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 38 | 37 | $97 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 38 | 38 | $110 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 37 | 37 | $164 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 32 | 32 | $132 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 20 | 20 | $167 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 47. This provider delivers 10.0× the peer median.Open Payments
Industry payments received
All-time total
$1,721
Transactions
87
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 31 | $483.88 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 10 | $191.79 | |
| Regeneron Healthcare Solutions, Inc. | 7 | $145.77 | |
| Janssen Biotech, Inc. | 8 | $145.20 | |
| GENZYME CORPORATION | 4 | $125.16 | |
| QOL Medical, LLC | 3 | $109.82 | |
| PFIZER INC. | 5 | $105.05 | |
| Lilly USA, LLC | 3 | $80.65 | |
| Merck Sharp & Dohme LLC | 3 | $72.16 | |
| Phathom Pharmaceuticals, Inc. | 3 | $47.67 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 3 | $46.90 | |
| Ardelyx, Inc. | 2 | $44.70 | |
| Intercept Pharmaceuticals, Inc. | 3 | $41.84 | |
| Madrigal Pharmaceuticals | 1 | $29.58 | |
| IRONWOOD PHARMACEUTICALS, INC | 1 | $19.45 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
558
Patients
256
Total drug cost
$66,230
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 233 | 94 | $5,049 |
| Pantoprazole Sodium | Generic | 81 | 28 | $1,412 |
| Clenpiq (Sod Picosulf/Mag Ox/Citric Ac) | Brand | 34 | 34 | $5,768 |
| Plenvu (Peg3350/Sod Sul/Nacl/Kcl/Asb/C) | Brand | 33 | 33 | $4,749 |
| Linzess (Linaclotide) | Brand | 32 | 15 | $33,826 |
| Ondansetron Odt (Ondansetron) | Brand | 20 | 12 | $358 |
| Dicyclomine Hcl | Generic | 19 | 11 | $514 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 15 | 15 | $487 |
| Ursodiol | Generic | 15 | 0 | $3,288 |
| Budesonide Dr (Budesonide) | Brand | 14 | 0 | $5,654 |
Frequently asked questions
What is Dr. Gregory Brennan's medical specialty?
Dr. Gregory Brennan practices Gastroenterology Physician in Mansfield, TX.
Where does Dr. Gregory Brennan practice?
Dr. Gregory Brennan practices at 647 N Miller RD Ste B, Mansfield, TX 760636180. Office phone: 8177607969.
What is Dr. Gregory Brennan's NPI?
Dr. Gregory Brennan's National Provider Identifier (NPI) is 1689017105, issued by NPPES.
Does Dr. Gregory Brennan accept Medicare assignment?
Yes. Dr. Gregory Brennan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Brennan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.