Michael Sim, M.D.

Michael Tan Sim, M.D.




Internal Medicine


  • Associate Physician Diplomate


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).

Lawrence J. Ellison Ambulatory Care Center

4860 Y St., Suite 0200
Sacramento, CA 95817
Driving Directions

Primary Phone:

Additional Phone Numbers

Clinic Phone: 916-734-2737
Clinic Fax: 916-734-2922
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 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 helps with managing the care of patients after kidney transplant.




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

M.A., Biblical and Theological, Western Seminary, Portland OR 2019

B.S., UCLA, Los Angeles CA 1997

Internship: 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

Board Certifications

American Board of Internal Medicine, Nephrology,

Professional Memberships

American Society of Nephrology

Christian Medical and Dental Association

Sierra Sacramento Valley Medical Society (SSMS)

Honors and Awards

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