Oncology

Mia Weiss, MD

Associate Professor of Medicine, Division of Oncology

Saint Louis, MO

Mia C. Weiss, MD, is a medical oncologist specializing in soft tissue and bone sarcomas at Washington University School of Medicine in St. Louis and Siteman Cancer Center. She treats patients with these rare malignancies, including leiomyosarcoma, and addresses related conditions such as upper digestive tract and stomach cancers more frequently than peers. Dr. Weiss serves adult populations, with a particular focus on older adults with sarcomas, where therapeutic options are often limited. Her s

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Credentials

Board Certifications

Internal Medicine (ABIM)
Medical Oncology (ABIM)

Education & Training

Medical School: Sackler School of Medicine Tel Aviv (MD, Unknown)
Residency: University of Chicago Medical Center (Internal Medicine, Unknown)
Fellowship: Rush University Medical Center (Hematology & Oncology, Unknown)
Chief Fellowship: Rush University Medical Center (Division of Hematology, Oncology and Cell Therapy, Unknown)

Years in Practice

12+ years

Peer Recognition

Castle Connolly — Top Doctor
2026
Healthgrades — Healthgrades Honor Roll

Clinical Focus

Subspecialties

Medical Oncology

Conditions & Treatments

Cancer SurvivorshipChemotherapy

Insurance(s) Accepted

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

Practice Details

Hospital Affiliations

Blessing Hospital
Christian Hospital
Barnes-jewish St Peters Hospital
Macon County Samaritan Memorial Hospital
Barnes-Jewish Hospital

Languages

English

Conditions Dr. Weiss treats

Insurance accepted

Frequently asked

Does Dr. Weiss accept Aetna insurance?

Mia Weiss'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. Weiss practice?

Mia Weiss practices in Saint Louis, MO with hospital affiliations including Blessing Hospital, Christian Hospital, and Barnes-jewish St Peters Hospital.

What does Dr. Weiss specialize in?

Mia Weiss is a board-certified oncology specialist with focus areas in Medical Oncology.

How long has Dr. Weiss been practicing?

Mia Weiss has 12+ years of clinical experience in oncology.

What is Dr. Weiss's medical training?

Public profile training history includes: Medical School: Sackler School of Medicine Tel Aviv (MD, Unknown); Residency: University of Chicago Medical Center (Internal Medicine, Unknown); Fellowship: Rush University Medical Center (Hematology & Oncology, Unknown).