Leah Stephenson Tzimenatos, M.D. for UC Davis Health

Leah Stephenson Tzimenatos, M.D.

Clinical Professor, Division of Pediatric Emergency Medicine

Chief, Division of Pediatric Emergency Medicine

Vice Chair, Division of Pediatric Emergency Medicine

Leah Stephenson Tzimenatos is not currently accepting new patients. For assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Pediatric Emergency Medicine

Locations and Contact

UC Davis Children's Hospital

UC Davis Children's Hospital
2315 Stockton Blvd.
Sacramento, CA 95817

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Additional Numbers

Clinic Phone


Clinic Fax


Physician Referrals

800-4-UCDAVIS (800-482-3284)

Clinical Interests

Leah Tzimenatos treats pediatric patients presenting with emergent medical illnesses and traumatic injuries. She is committed to the education of medical students, residents and nurses, as well as the individual patients and their families.

Research/Academic Interests

Leah Tzimenatos' research interests include patient safety, medical error prevention and pediatric analgesia and sedation.


Pediatric Emergency Medicine
Emergency Medicine

Center/Program Affiliation

UC Davis Children's Hospital

Undergraduate School

B.A., Biology, University of Virginia, Charlottesville VA 1997

Medical School

M.D., Baylor College of Medicine, Houston TX 2001


Pediatrics, Baylor College of Medicine, Houston TX 2001-2004


Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati OH 2004-2007

Named “Top Doctor” by Sacramento Magazine, 2020, 2021

UC Davis Chancellor’s Achievement Award for Diversity and Community, Department of Emergency Medicine, 2019

UC Davis Deans’ Team Award for Excellence in Research, 2018

Best Research Presentation by a Trainee, Section of Injury and Poisoning Prevention, American Academy of Pediatrics National Conference and Exhibition, 2006

Alpha Omega Alpha Honor Medical Society, 2000

Glaser NS, Stoner MJ, Garro A, Baird S, Myers SR, Rewers A, Brown KM, Trainor JL, Quayle KS, McManemy JK, DePiero AD, Nigrovic LE, Tzimenatos L, Schunk JE, Olsen CS, Casper TC, Ghetti S, Kuppermann N; Pediatric Emergency Care Applied Research Network (PECARN) DKA FLUID Study Group. Serum Sodium Concentration and Mental Status in Children With Diabetic Ketoacidosis. Pediatrics. 2021 Sep;148(3):e2021050243. doi:10.1542/peds.2021-050243. Epub 2021 Aug 9. PMID:34373322.

Rewers A, Kuppermann N, Stoner MJ, Garro A, Bennett JE, Quayle KS, Schunk JE, Myers SR, McManemy JK, Nigrovic LE, Trainor JL, Tzimenatos L, Kwok MY, Brown KM, Olsen CS, Casper TC, Ghetti S, Glaser NS; Pediatric Emergency Care Applied Research Network (PECARN) FLUID Study Group. Effects of Fluid Rehydration Strategy on Correction of Acidosis and Electrolyte Abnormalities in Children With Diabetic Ketoacidosis. Diabetes Care. 2021 Sep;44(9):2061-2068. doi:10.2337/dc20-3113. Epub 2021 Jun 29. PMID:34187840.

Andrada E, Danielson A, Magaña J, Tzimenatos L, Clarke S. A pirate ship sailed into the yacht club: How we built a novel pediatric emergency medicine curriculum for an emergency medicine training program. AEM Educ Train. 2021 Jul 1;5(3):e10635. doi:10.1002/aet2.10635. PMID:34471791.

Tzimenatos L, Nigrovic LE. Managing Diabetic Ketoacidosis in Children. Ann Emerg Med. 2021 May 6;78(3):340-345 doi:https://doi.org/10.1016/j.annemergmed.2021.02.028.

Florin TA, Ramilo O, Hoyle JD Jr, Jaffe DM, Tzimenatos L, Atabaki SM, Cohen DM, VanBuren JM, Mahajan P, Kuppermann N; Febrile Infant Working Group of the Pediatric Emergency Care Applied Research Network (PECARN). Radiographic Pneumonia in Febrile Infants 60 Days and Younger. Pediatr Emerg Care. 2021 May 1;37(5):e221-e226. doi:10.1097/PEC.0000000000002187. PMID:32701869.

Myers SR, Glaser NS, Trainor JL, Nigrovic LE, Garro A, Tzimenatos L, Quayle KS, Kwok MY, Rewers A, Stoner MJ, Schunk JE, McManemy JK, Brown KM, DePiero AD, Olsen CS, Casper TC, Ghetti S, Kuppermann N; Pediatric Emergency Care Applied Research Network (PECARN) DKA FLUID Study Group. Frequency and Risk Factors of Acute Kidney Injury During Diabetic Ketoacidosis in Children and Association With Neurocognitive Outcomes. JAMA Netw Open. 2020 Dec 1;3(12):e2025481. doi:10.1001/jamanetworkopen.2020.25481. PMID:33275152.

Ghetti S, Kuppermann N, Rewers A, Myers SR, Schunk JE, Stoner MJ, Garro A, Quayle KS, Brown KM, Trainor JL, Tzimenatos L, DePiero AD, McManemy JK, Nigrovic LE, Kwok MY, Perry CS 3rd, Olsen CS, Casper TC, Glaser NS; Pediatric Emergency Care Applied Research Network (PECARN) DKA FLUID Study Group. Cognitive Function Following Diabetic Ketoacidosis in Children With New-Onset or Previously Diagnosed Type 1 Diabetes. Diabetes Care. 2020 Nov;43(11):2768-2775. doi:10.2337/dc20-0187. Epub 2020 Sep 22. PMID:32962981.

Natale JE, Boehmer J, Blumberg DA, Dimitriades C, Hirose S, Kair LR, Kirk JD, Mateev SN, McKnight H, Plant J, Tzimenatos LS, Wiedeman JT, Witkowski J, Underwood MA, Lakshminrusimha S. Interprofessional/interdisciplinary teamwork during the early COVID-19 pandemic: experience from a children's hospital within an academic health center. J Interprof Care. 2020 Sep-Oct;34(5):682-686. doi:10.1080/13561820.2020.1791809. Epub 2020 Jul 16. PMID:32674638.

DePiero A, Kuppermann N, Brown KM, Schunk JE, McManemy JK, Rewers A, Stoner MJ, Tzimenatos L, Garro A, Myers SR, Quayle KS, Trainor JL, Kwok MY, Nigrovic LE, Olsen CS, Casper TC, Ghetti S, Glaser NS; Pediatric Emergency Care Applied Research Network (PECARN) DKA FLUID Study Group. Hypertension during Diabetic Ketoacidosis in Children. J Pediatr. 2020 Aug;223:156-163.e5. doi:10.1016/j.jpeds.2020.04.066. Epub 2020 May 6. PMID:32387716.

Skains RM, Kuppermann N, Homme JL, Kharbanda AB, Tzimenatos L, Louie JP, Cohen DM, Nigrovic LE, Westphal JJ, Shah ND, Inselman J, Ferrara MJ, Herrin J, Montori VM, Hess EP. What is the effect of a decision aid in potentially vulnerable parents? Insights from the head CT choice randomized trial. Health Expect. 2020 Feb;23(1):63-74. doi:10.1111/hex.12965. Epub 2019 Nov 23. PMID:31758633.