Sonal Phatak, M.D.

Sonal Phatak, M.D.


Endocrinology, Diabetes, and Metabolism

Internal Medicine


  • Associate Professor


To see if Sonal Phatak 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 0400
Sacramento, CA 95817
Driving Directions

Primary Phone:

UC Davis Medical Group - Rocklin

550 West Ranch View Dr., Suite 2005
Rocklin, CA 95765
Driving Directions

Primary Phone:

Additional Phone Numbers

Physician Referrals: 800-4-UCDAVIS (800-482-3284)


Endocrinology, Diabetes, and Metabolism

Center/Program Affiliation

UC Davis Medical Group


M.D., UCLA School of Medicine, Los Angeles CA 2003

B.S., UC Riverside, Riverside CA 1999

Internship: Loma Linda University Medical Center, Loma Linda CA 2003-2004


Loma Linda University Medical Center, Loma Linda CA 2004-2006


UC San Diego Medical Center, San Diego CA 2010-2012

Board Certifications

American Board of Internal Medicine, 2006

American Board of Internal Medicine, Endocrinology, Diabetes and Metabolism, 2012

Professional Memberships

American College of Physicians

Associate Faculty Member of Faculty of 1000: Post-Publication Peer Review

The Endocrine Society

Select Recent Publications

Sarikonda G, Sachithanantham S, Pettus J, Rodriguez-Calvo T, Phatak S, Edelman S, von Herrath M. Higher proinflammatory cytokine production and spontaneous activation in some type 1 and type 2 diabetic subjects. Clin Immunol. 2014 Nov;155(1):27-9.

Sarikonda G, Pettus J, Phatak S, Sachithanantham S, Miller JF, Wesley JD, Cadag E, Chae J, Ganesan L, Mallios R, Edelman S, Peters B, von Herrath M. CD8 T-cell reactivity to islet antigens is unique to type 1 while CD4 T-cell reactivity exists in both type 1 and type 2 diabetes. J Autoimmun. 2014 May;50:77-82.

Sarikonda G, Pettus J, Sachithanantham S, Phatak S, Miller JF, Ganesan L, Chae J, Mallios R, Edelman S, Peters B, von Herrath M. Temporal intra-individual variation of immunological biomarkers in type 1 diabetes patients: implications for future use in cross-sectional assessment. PLoS One. 2013 Nov 4;8(11):e79383.

Fidler MC, Sanchez M, Raether B, Weissman NJ, Smith SR, Shanahan WR, Anderson CM; BLOSSOM Clinical Trial Group. A one-year randomized trial of lorcaserin for weight loss in obese and overweight adults: the BLOSSOM trial. J Clin Endocrinol  Metab. 2011 Oct;96(10):3067-77.