Gregory Brennan is a Gastroenterology physician affiliated with University of North Texas Health Science Center. OpenAlex indexes 38 publications with 255 citations (h-index 5).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
647 N Miller Rd Ste B
Mansfield, TX 760636180
Telephone
817-760-7969Provider last certified this registry record 25 Aug 2021.
Industry payments
40 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- ABBVIE INC.Program year202529 payments
- Janssen Biotech, Inc.Program year20259 payments
- Salix Pharmaceuticals, a division of Bausch Health US, LLCProgram year20255 payments
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Efficacy and Safety of Tofacitinib for Acute Severe Ulcerative Colitis: A Systematic Review and Meta-Analysis
Gastroenterology Research
2025 - S3884 Reflux Colitis: A Rare Complication Following Colonic Interposition
The American Journal of Gastroenterology
2025
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A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments, shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”