Oncology

Patrick Grierson, MD

Assistant Professor, Medical Oncology

Saint Louis, MO

Patrick Michael Grierson, MD, PhD, is an Assistant Professor of Medical Oncology in the Division of Oncology at Washington University School of Medicine in St. Louis, Missouri. He specializes in gastrointestinal malignancies, treating specific conditions including esophageal cancer, gastric cancer, pancreatic cancer, liver cancer (hepatocellular carcinoma), colon cancer (intestine/colon cancer), rectal cancer, and cholangiocarcinoma. Dr. Grierson serves adult patients with these often difficult-

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Credentials

Board Certifications

Internal Medicine (ABIM)
Medical Oncology (ABIM)

Education & Training

Medical School: The Ohio State University College of Medicine (MD, 2014)
Residency: Barnes-Jewish Hospital (Internal Medicine, 2014-2016)
Fellowship: Washington University School of Medicine in Saint Louis (Hematology & Oncology, 2016-2020)

Years in Practice

12+ years

Peer Recognition

Castle Connolly — Top Doctor
2026
Healthgrades — Healthgrades Honor Roll

Clinical Focus

Subspecialties

Medical Oncology

Conditions & Treatments

ImmunotherapyPancreatic CancerCancer SurvivorshipChemotherapyColorectal Cancer

Insurance(s) Accepted

Please verify your coverage with the provider — plan participation can change.

Practice Details

Hospital Affiliations

Barnes-Jewish Hospital
Parkland Health Center
Barnes-jewish West County Hospital
Washington University School of Medicine
Siteman Cancer Center

Languages

English

Conditions Dr. Grierson treats

Insurance accepted

Frequently asked

Does Dr. Grierson accept Aetna insurance?

Patrick Grierson's public profile lists Aetna, Anthem Blue Cross Blue Shield, and Blue Cross Blue Shield plus 7 more health plans as accepted plans. Plan participation can change — confirm directly with the practice before your visit.

Where does Dr. Grierson practice?

Patrick Grierson practices in Saint Louis, MO with hospital affiliations including Barnes-Jewish Hospital, Parkland Health Center, and Barnes-jewish West County Hospital.

What does Dr. Grierson specialize in?

Patrick Grierson is a board-certified oncology specialist with focus areas in Medical Oncology.

How long has Dr. Grierson been practicing?

Patrick Grierson has 12+ years of clinical experience in oncology.

What is Dr. Grierson's medical training?

Public profile training history includes: Medical School: The Ohio State University College of Medicine (MD, 2014); Residency: Barnes-Jewish Hospital (Internal Medicine, 2014-2016); Fellowship: Washington University School of Medicine in Saint Louis (Hematology & Oncology, 2016-2020).