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Gabriel A. Brooks, MD, MPH

Title(s)
Associate Professor of Medicine
Associate Professor of The Dartmouth Institute

Additional Titles/Positions/Affiliations
Member, Cancer Population Sciences Research Program
Member, Gastrointestinal Clinical Oncology Group

Department(s)
Medicine
The Dartmouth Institute

Education
B.A., Dartmouth College - 2002
M.D., University of Pennsylvania - 2006
M.P.H., Harvard T.H. Chan School of Public Health - 2013

Programs
Dartmouth Cancer Center
The Dartmouth Institute for Health Policy and Clinical Practice

Websites
https://www.gaboncology.com

Contact Information


Professional Interests

Cancer care delivery
Interventions to prevent hospitalizations during cancer treatment
Interventions to reduce toxicity of cancer treatment
Screening for DPD deficiency prior to fluoropyrimidine chemotherapy


Selected Publications

 

Outcomes Among Medicare Beneficiaries After Cancer Surgery in Hospitals That Subsequently Closed.
Kim MY, Staiger DO, Brooks GA, Wang Q, Wong SL, Tosteson ANA
JAMA Netw Open. 2026 Jan 2;9(1):e2553704. doi: 10.1001/jamanetworkopen.2025.53704. Epub 2026 Jan 2.
PMID: 41528743

Changes in patient-sharing patterns after oncologist departures in rural and urban settings: a Medicare cohort study.
Cornelius SL, O'Malley AJ, Brooks GA, Tosteson ANA, Schaefer A, Moen EL
Appl Netw Sci. 2026;11(1):1. doi: 10.1007/s41109-025-00762-3. Epub 2025 Dec 2.
PMID: 41509684

Patient and staff experiences with an EHR-Integrated Symptom Management Program (eSyM) in oncology.
Cronin CM, Barrett F, Dias S, Paudel R, Osarogiagbon RU, Schrag D, Wong SL, Dizon DS, Bian JJ, Hazard-Jenkins HW, Brooks GA, Revette A, Hassett MJ
Support Care Cancer. 2025 Dec 24;34(1):54. doi: 10.1007/s00520-025-10248-8. Epub 2025 Dec 24.
PMID: 41442064

Association of DPYD rs4294451, plasma uracil concentration, and sex with 5-fluorouracil exposure in patients with gastrointestinal cancer.
Brooks GA, Ness DB, Hourdequin KC, Ripple GH, Amin M, Lord-Halvorson S, Khan WA, Deharvengt SJ, Busque V, Dragnev KH, Zhao W, Tosteson TD, Lewis LD
Cancer Chemother Pharmacol. 2025 Dec 4;95(1):120. doi: 10.1007/s00280-025-04851-z. Epub 2025 Dec 4.
PMID: 41339584

Associations of Social Deprivation and Oncology Physician Network Vulnerability With Acute Care Utilization in the SEER-Medicare Population.
Korsberg AA, Brooks GA, O'Malley AJ, Onega T, Schaefer AP, Moen EL
Health Serv Res. 2026 Feb;61(1):e70070. doi: 10.1111/1475-6773.70070. Epub 2025 Nov 18.
PMID: 41255080

ASO Visual Abstract: Rurality and Use of Metastasis-Directed Therapies in Medicare Beneficiaries with Metastatic Colon Cancer: A Retrospective Cohort Study.
Ladage VP, Ramkumar N, Wang Q, O'Malley AJ, Colla CH, Wong SL, Tosteson ANA, Brooks GA
Ann Surg Oncol. 2026 Jan;33(1):378. doi: 10.1245/s10434-025-18586-x.
PMID: 41109876

Rurality and Use of Metastasis-Directed Therapies for Medicare Beneficiaries with Metastatic Colon Cancer: A Retrospective Cohort Study.
Ladage VP, Ramkumar N, Wang Q, O'Malley AJ, Colla CH, Wong SL, Tosteson ANA, Brooks GA
Ann Surg Oncol. 2026 Jan;33(1):365-373. doi: 10.1245/s10434-025-18412-4. Epub 2025 Sep 29.
PMID: 41023546

A pragmatic, single-arm clinical trial of a dose modification algorithm for preventing cytopenia-related delays during FOLFOX chemotherapy.
Wright HN, Tosteson TD, Hourdequin KC, Ripple GH, Fuld AD, Dragnev KH, Amin M, Muralikrishnan S, McGrath EB, Stannard MG, Schofield LL, Lord-Halvorson S, Tosteson ANA, Brooks GA
Support Care Cancer. 2025 Aug 8;33(9):769. doi: 10.1007/s00520-025-09784-0. Epub 2025 Aug 8.
PMID: 40779182

Hidden figures underlying quality measures: revealing hidden racial inequalities in end-of-life cancer care delivery: a cohort study.
Khayal IS, Shin JJ, Brooks GA, Barnato AE, Akre ER, Lewinson T, Farid AM, O'Malley AJ
Lancet Reg Health Am. 2025 Jul;47:101135. doi: 10.1016/j.lana.2025.101135. Epub 2025 Jun 3.
PMID: 40529849

Rural Oncologists' Perceptions of Specialty Scarcity and Repercussions for Care Delivery: A Qualitative Study.
Moen EL, Tirrell C, Brooks GA, O'Malley AJ, Onega T, Schifferdecker KE
JCO Oncol Pract. 2026 Jan;22(1):167-173. doi: 10.1200/OP-24-01065. Epub 2025 May 12.
PMID: 40354601

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