Our success is intimately linked to the accomplishments of each and every member of our department.

Each month, four members are nominated and featured to celebrate their commitment to patient care, education, and research.


Current Featured Anesthesiology Department Members

Andrew Griesbaum, ACNP
Nurse Practitioner

Qin Liu, PhD
Professor of Anesthesiology

Jake Meinkoth
Clinical Informaticist

Sydney Tyler, MD
Resident Physician


Featured Anesthesiology Department Members Archive

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Kathryn Gratza, CRNA, DNP

Kathryn Gratza, CRNA, DNP

Nurse Anesthetist

Department of Anesthesiology Featured Member: September 2025

Kathryn is a Certified Registered Nurse Anesthetist in the Department of Anesthesiology, primarily serving the obstetric population at Missouri Baptist Medical Center.

She holds a Bachelor of Science in Nursing from Bradley University, a Master of Science in Nursing from Saint Louis University, and a Doctorate of Nursing Practice from Southern Illinois University Edwardsville.

Outside of her professional responsibilities, Kathryn enjoys spending quality time with her daughter and family, reading, baking, and coaching volleyball.

Michael Green, MD

Michael Green, MD

Resident Physician, Class of 2027

Department of Anesthesiology Featured Member: May 2025

Michael is a CA-1 in the anesthesiology residency class of 2027. Originally from Michigan and raised in St. Louis, he earned his undergraduate degree in biochemistry from the University of Colorado at Boulder. After college, Michael joined the Peace Corps and spent time teaching in Ecuador. He later moved to Phoenix, Arizona, where he helped license and expand a free primary care clinic for uninsured individuals ineligible for public healthcare—an experience that sparked his passion for increasing access to high-quality medical care and ultimately inspired him to pursue a career in medicine.

In true adventurous spirit, Michael attended medical school at La Universidad Autónoma de Guadalajara in Mexico. More than a decade after leaving St. Louis, he was excited to return home and join the department as a resident physician.

Michael values the exceptional training environment at WashU Medicine, where he sees a wide variety of complex cases as part of a quaternary care center, while also helping care for the local community in a safety-net hospital role. He’s proud to be part of a department that welcomes people from all backgrounds, including many who’ve followed nontraditional paths—just like him.

Outside the hospital, Michael enjoys hiking, traveling with his wife and dogs, and cycling. A personal goal of his is to visit every U.S. National Park—he’s already made it to 23, with 40 more to go!

Ottavia Green, MD

Ottavia Green, MD

Resident Physician, Class of 2023

Department of Anesthesiology Featured Member: May 2021

Ottavia is a current CA-1 resident in the Department of Anesthesiology. She was born and raised in Jamaica and migrated to Florida with her family in 2011. She attended college and medical school there before moving to St. Louis to battle the winter. She is interested in working with the pediatric population after residency.

During her spare time, she enjoys watching anime and reading manga. She is currently learning Japanese as a means of watching her anime without needing to use subtitles. She is also a fan of the show ‘Survivor’ and is contemplating applying to the show once she overcomes the fear of sleeping outside in the cold. Ottavia currently lives in the central west end with her 12 plants all of which have names. Prior to the COVID pandemic, Ottavia also enjoyed solo traveling. Her favorite country visited so far is Thailand.

Tori Greenberg

Tori Greenberg

Senior Coordinator of Payroll & Administration

Department of Anesthesiology Featured Member: April 2025

Tori joined WashU Medicine nearly five years ago and became part of the Department of Anesthesiology in December 2022. As the Senior Coordinator of Payroll & Administration on the finance team, she handles monthly clinical payroll, new hire onboarding, and various administrative tasks.

Originally from St. Louis, Tori earned her undergraduate degree in Human Resource Management from the University of Northern Iowa, where she was also a member of the swim team. In her free time, she enjoys staying active, cooking, exploring local breweries, and watching Cardinals games.