Sonal V. Phatak, M.D. for UC Davis Health

Sonal V. Phatak, M.D.

Associate Professor

To see if Sonal V. Phatak 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

4860 Y St.
Sacramento, CA 95817

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1620 East Roseville Parkway
Roseville, CA 95661

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Additional Numbers

Clinic Phone


Physician Referrals

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

Clinical Interests

Dr. Phatak has interests in all areas of endocrinology with specific focus on adrenal disorders, bone/calcium disorders, and diabetes.


Endocrinology, Diabetes, and Metabolism

Center/Program Affiliation

UC Davis Medical Group

Undergraduate School

B.S., Biomedical Sciences, UC Riverside, Riverside CA 1999

Medical School

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


Internal Medicine, Loma Linda University Medical Center, Loma Linda CA 2003-2004


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


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

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):27-29. doi:10.1016/j.clim.2014.08.007. Epub 2014 Aug 27. PMID:25173803.

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. doi:10.1016/j.jaut.2013.12.003. Epub 2013 Dec 30. PMID:24387802.

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. doi:10.1371/journal.pone.0079383. PMID:24223938.

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. doi:10.1210/jc.2011-1256. Epub 2011 Jul 27. PMID:21795446.