Michael Tan Sim, M.D., M.A.B.T.S. for UC Davis Health

Michael Tan Sim, M.D., M.A.B.T.S.

Associate Physician, Department of Internal Medicine, Division of Nephrology

To see if Michael Tan Sim is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).





Internal Medicine

Locations and Contact

Lawrence J. Ellison Ambulatory Care Center

General Internal Medicine
4860 Y St.
Sacramento, CA 95817

Get Directions

Phone: 916-734-2737

Additional Numbers

Clinic Fax


Physician Referrals

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

Philosophy of Care

I believe that the physician and patient should develop a trusting relationship so that we can work together as a team to make good informed decisions. My goal is to help someone make the choices that will lead to their best health and quality of life.

Clinical Interests

Dr. Sim is a general nephrologist (kidney specialist) who focuses his care on adults with chronic kidney disease which is frequently caused by diabetes mellitus and high blood pressure. He also helps with managing the care of patients after kidney transplant.



Undergraduate School

B.S., Physiological Science, UCLA, Los Angeles CA 1997

Medical School

M.D., Tufts University School of Medicine, Boston MA 2001

Other School

M.A.B.T.S., Theology, Western Seminary, Portland OR 2019


Internal Medicine, Tufts-New England Medical Center, Boston MA 2001-2002


Internal Medicine, Tufts-New England Medical Center, Boston MA 2002-2004


Nephrology, UC Davis Medical Center, Sacramento CA 2005-2007

Top Doctors in Nephrology - Sacramento Magazine, 2016

Recognized for High Performance in Kaiser Member-Patient Satisfaction Survey, 2010, 2011, 2012, 2013, 2014, 2015, 2016

Excellence in Teaching Award - Tufts University School of Medicine, 2003