Udhayvir S. Grewal, MBBS

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Rating: 4.9 out of 5 (63 ratings)

Role

Gastrointestinal Medical Oncology
Specialty

Neuroendocrine Tumors Anal Cancer Appendix (Appendiceal) Cancer Bile Duct (Biliary) Cancer Colorectal Cancer Esophageal Cancer Gallbladder Cancer Gastrointestinal Stromal Tumor Liver Cancer Pancreatic Cancer Small Bowel Cancer Stomach (Gastric) Cancer
Research Program

Discovery and Developmental Therapeutics
Practicing Since

2025

Call 404-778-1900

Background

Udhayvir S. Grewal, MBBS, is a board-certified medical oncologist specializing in gastrointestinal cancers and neuroendocrine neoplasms, including neuroendocrine tumors and carcinomas. Dr. Grewal's research is focused on therapeutic development and care delivery in gastrointestinal and neuroendocrine cancers. He joined the clinical staff at Winship Cancer Institute as an attending physician in 2025. His practice is based at Winship Cancer Institute at Emory Midtown and Grady Memorial Hospital.

Dr. Grewal is an assistant professor in the Department of Hematology and Medical Oncology at Emory University School of Medicine.

He earned his medical degree from Baba Farid University of Health Sciences in Faridkot, India. He completed his internal medicine residency at Louisiana State University in Shreveport and his hematology and oncology fellowship at the University of Iowa in Iowa City.

Titles & Roles

Assistant Professor, Department of Hematology and Medical Oncology

Emory University School of Medicine

Education & Training

Education

Fellowship, Hematology/Oncology, 2025
University of Iowa Hospital and Clinics
Residency, Internal Medicine, 2022
Louisiana State University Health Science Center
Internship, Internal Medicine, 2020
Louisiana State University Health Science Center
Medical Education, MBBS, 2018
Government Medical College

Board Certifications

Medical Oncology
American Board of Internal Medicine, 2025
Internal Medicine
American Board of Internal Medicine, 2022

Professional Memberships

American Society of Hematology
American Society of Clinical Oncology
American Medical Association
American Association for Cancer Research

Research

View Current Clinical Trials


A Study to Evaluate Chemotherapy With or Without INCB161734 in Previously Untreated, KRAS G12D-Mutated Metastatic Pancreatic Ductal Adenocarcinoma Phase III Conditions Solid Tumors Location Emory University Hospital Midtown, Winship Cancer Institute
DAREON®-NEC-1: A Study in People With Advanced Extrapulmonary Neuroendocrine Cancer (epNEC) to Compare Obrixtamig Plus Carboplatin and Etoposide Treatment With Standard Chemotherapy Phase III Conditions Extrapulmonary Neuroendocrine Cancer (epNEC) Location Emory University Hospital Midtown, Winship Cancer Institute

Publications

Dr. Grewal has published extensively in peer-reviewed scientific journals.

Title/Journal	Authors	Publication Date
Care delivery among patients with early-onset versus average-onset cholangiocarcinoma: a nationwide retrospective analysis. ESMO gastrointestinal oncology	US Grewal, A Nottke, BT Loeffler, SJ Concors, NJ Hornstein, TJ Brown, A Lamarca, JW Valle	12/01/2026
Comparative Analysis of Characteristics and Outcomes of Patients with Early-Onset Versus Average-Onset Small Bowel Neuroendocrine Tumors. American journal of clinical oncology	MT Gao, RR Patel, J Semprini, CW Shi, M Pustake, T Xu, SJ Concors, M O'Rorke, JS Dillon, C Chandrasekharan, US Grewal	09/04/2026
Age-stratified mutation patterns in early-onset colorectal cancer reveal distinct molecular features and therapeutic implications. ESMO gastrointestinal oncology	L Liu, A Rose, A Samaddar, BM Ascherman, J Levenson, TJ Brown, US Grewal, NJ Hornstein	09/01/2026
Bridging the Gap: Clinical Integration of Thrombopoietin Receptor Agonists in GI Cancer-Associated Chemotherapy-Induced Thrombocytopenia. Journal of clinical oncology : official journal of the American Society of Clinical Oncology	RS Alameddine, TJ Brown, NJ Hornstein, US Grewal	09/01/2026
Systemic therapies for gastroenteropancreatic neuroendocrine carcinomas: Current paradigm and future avenues. European journal of cancer (Oxford, England : 1990)	CW Shi, A Singh, AA Khosla, R Thummalapalli, S Mukherjee, HP Soares, C Chandrasekharan, TR Halfdanarson, DM Halperin, US Grewal	08/22/2026
RAF/MEK Clamp Inhibition with Avutometinib and Cetuximab in RAF1 S257L-Mutated, Anti-EGFR-Refractory Metastatic Colorectal Cancer in Gaucher's disease. The oncologist	A Rose, A Rosenberg, US Grewal, TJ Brown, N Hornstein	08/19/2026
Patient-reported outcomes and targeted therapeutic escalation in NRG Oncology/RTOG 1010: When intensification fails to translate to improved outcomes. Cancer	TJ Brown, NJ Hornstein, US Grewal, NN Sanford	08/15/2026
Practical considerations for the use of incretin mimetics in patients with neuroendocrine neoplasms: An expert consensus statement. Cancer	US Grewal, PH Ear, MB Sonbol, AM Bellizzi, J Hofland, J Crona, JS Dillon, JA Chan, JR Howe, J Strosberg, S Singh, TR Halfdanarson	08/15/2026
Grade Progression and High-Grade Transformation in Neuroendocrine Neoplasms. Endocrine-related cancer	US Grewal, M Gosse, SJ Concors, RS Gonzalez, PH Ear, DM Halperin, C Chandrasekharan, S Singh, AM Bellizzi	07/13/2026
Anthracycline Chemotherapy does not Increase Arterial Stiffness or Carotid Intima-Media Thickness in Young Adult Survivors of Hematological Malignancies. Journal of applied physiology (Bethesda, Md. : 1985)	MK Armstrong, M Alidadi, U Grewal, T Young, A Stroud, M Halyko, JAO Zimmerman, G Sutamtewagul, E Mou, GL Pierce	07/08/2026
Palliative Care Consultation and End-of-Life Care Among Patients With Esophageal Cancer and Inpatient Mortality. JCO oncology practice	S Baskar, US Grewal	07/01/2026
Care Patterns and Gastric Cancer-Related Outcomes in Patients With Pathogenic/Likely Pathogenic Germline CDH1 Variants: A 14-Year Single-Center Analysis. American journal of clinical oncology	R Schoeneich, RR Patel, BR Lee, P Disano, MT Gao, M VanDerGraaf, M Gosse, R El Abiad, A Levin, C Chandrasekharan, H Hoshi, AM Bellizzi, NH Fei, US Grewal	06/30/2026
Symptom burden and outcomes among patients with early-onset versus average-onset neuroendocrine neoplasms. Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer	S Baskar, RR Patel, B Rose, S Bawek, A Samaddar, T Xu, M O'Rorke, D Vadehera, TJ Brown, N Hornstein, US Grewal	06/25/2026
Outcomes With Peptide Receptor Radionuclide Therapy in Patients With Pheochromocytoma/Paraganglioma: A Center of Excellence Experience. American journal of therapeutics	MT Gao, RR Patel, S Jain, JS Dillon, C Chandrasekharan, US Grewal	06/17/2026
Robust response to pembrolizumab in Temozolomide-Associated Hypermutated and Microsatellite Instability-High Functional Pancreatic Neuroendocrine Tumor. The oncologist	US Grewal, CW Shi, S Muzahir, PH Ear, SJ Concors, DM Halperin	06/15/2026
Characterizing symptom patterns in early-onset colorectal cancer: insights from a national inpatient analysis. Cancer treatment and research communications	A Samaddar, S Basker, S Bawek, U Grewal, TJ Brown, S Gholami, L Liu, D Vadehra, N Hornstein	06/13/2026
Primary tumor resection in the setting of unresectable metastatic disease in small bowel NETs: consensus and controversy. Endocrine-related cancer	EAK Warren, MD Roorbach, H Ernyey, US Grewal, A Gangi, DM Haperin, S Concors	06/08/2026
A Real-World, Propensity-Matched Analysis of Second-Line FOLFIRI-Ramucirumab Versus Ramucirumab-Paclitaxel in Patients With Advanced Upper Gastrointestinal Cancers. American journal of clinical oncology	JM Hyak, P Ruan, AL Jones, N Verma, V Chung, US Grewal, D Vadehra, N Hornstein, SC Wang, MR Porembka, S Badiyan, NN Sanford, S Kazmi, TJ Brown	06/01/2026
Evolving Therapeutic Strategies in Neuroendocrine Neoplasms: A New Era of Personalized Therapies. American Society of Clinical Oncology educational book. American Society of Clinical Oncology. Annual Meeting	US Grewal, S Shaheen, DB Zhen, ES Mittra, TR Halfdanarson, S Singh, JA Chan	06/01/2026
Has Colorectal Cancer (c-)Met Its Match With Telisotuzumab Adizutecan? Journal of clinical oncology : official journal of the American Society of Clinical Oncology	TJ Brown, M Ozer, US Grewal, NJ Hornstein	05/27/2026
Optimizing Systemic Therapy in Advanced Gastrointestinal Malignancies: Strategies to Minimize Toxicity and Maximize Tolerability. Clinical colorectal cancer	S Bulancea, US Grewal, M Wronska, D Vadehra, N Hornstein, TJ Brown, M Shusterman	05/20/2026
Viral vs. Non-Viral Combined Hepatocellular-Cholangiocarcinoma: Distinct Genomic Landscapes and Survival Outcomes. Journal of gastrointestinal cancer	N Puttagunta, M Friedman, B Khandakar, TJ Brown, US Grewal, N Hornstein	05/18/2026
Germline genetic testing among patients with pancreatic adenocarcinoma: A Pancreatic Cancer Action Network patient survey. Cancer	US Grewal, RR Patel, BT Loeffler, S Rathjens, K Abdilleh, F Zelada-Arenas, NJ Hornstein, TJ Brown, SJ Concors, NH Fei, S Sharif, C Chandrasekharan	05/15/2026
Genomic and transcriptomic differences between neuroendocrine neoplasms and carcinomas with human papillomavirus (HPV). Infectious agents and cancer	M Madill, U Grewal, H Krause, A Elliott, M Wahidi, JS Rader, D Teoh, SJ Park, J Wallbillich, DJ Benjamin, AR Kalebasty, P Duerksen-Hughes, R Morris, R Gogoi, F Zaiem, TJ Herzog, PH Thaker, D Bryant, M Oberley, H Soares, J Xiu, A Hinton, D Jain, BK Erickson, M Bazzaro, E Lou, RA Fehmi	05/02/2026
Premature discontinuation of clinical trials in biliary tract cancers: Predictors and implications. Journal of cancer policy	MT Gao, RR Patel, S Baskar, D Vadehra, N Hornstein, TJ Brown, US Grewal	03/01/2026

Awards

2025 - Patient Centered Award Winner

Ratings & Reviews

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4.9	One star One star One star One star One half star	Provider showed concern
4.9	One star One star One star One star One half star	Provider explained things clearly
4.9	One star One star One star One star One half star	Provider discussed treatment options
4.9	One star One star One star One star One half star	Provider included you in decisions
4.9	One star One star One star One star One half star	Likelihood of recommending this provider

View Reviews


One star One star One star One star One star	08/13/2026	We continue to "sing the praises" for everyone at Emory Winship Midtown.
One star One star One star One star One star	07/09/2026	I was a little nervous at first but the doctors and answered all my questions and we hatched a plan to go forward with my treatment.
One star One star One star One star One star	06/18/2026	Dr. Crewal is caring and comfortable to talk to about my treatments.
One star One star One star One star One star	06/18/2026	Dr. Grewal's advice Is thoughtful, he is highly engaged in the conversation and he works to recommend a treatment decision that is informed by my whole person and my quality of life -- not just the state of my disease.
One star One star One star One star One star	05/14/2026	Emory Winship Cancer Institute is amazing!The professionalism shows In everyone we encounter. The leadership board must recruit the BEST of the BEST! Thank You!
One star One star One star One star One star	04/12/2026	This visit covered test results, history, treatment options, and a look forward of how neuroendocrine cancer progresses (in general). The conversation was detailed, candid, trust-generating and a bi-directional exchange of quality of care / life ideas and options. I left feeling impressed by the knowledge and experiences of the team, hopeful and well-informed about next steps.
One star One star One star One star One star	03/19/2026	I could not ask for a better care team
One star One star One star One star One star	03/05/2026	Great experience!
One star One star One star One star One star	02/21/2026	Great Experience!
One star One star One star One star One star	02/19/2026	Great service to me and keeping me informed.