Gregory L. Simpson MD

  • Division Chief of Dermatology, UCSF Fresno
  • Medical Director, University Dermatology Associates
  • Associate Clinical Professor, UCSF


Gregory L. Simpson, MD, is board certified in Dermatology.

He earned his medical degree from the University of Tennessee, completed a preliminary internal medicine year at Georgetown University, and finished his dermatology residency at the Medical College of Georgia.

Dr. Simpson has been the Medical Director of Dermatology at UCSF Fresno since 2013. He has been working with UCSF Fresno Internal Medicine, Pediatrics, and Emergency Medicine residents since 2010 (in addition to medical students). His professional interests include complex medical dermatology, pediatric dermatology, bullous disorders, infectious disease, birthmarks, skin malignancies, and all ranges of inflammatory skin conditions.

Dr. Simpson has given lectures in San Francisco, Washington DC, Georgia, Yosemite, and multiple locations in the greater central valley within the last year. He has presented at local high schools raising awareness of skin cancer and melanoma, and helps to provide continuing medical education to many primary care physicians in Fresno. Dr. Simpson feels that he can help make a difference for multiple people that do not have access to dermatologic care.

He and his wife, a Fresno native, have three children and enjoy outdoor activities.


  • 1996 Salutatorian Franklin Road Academy
  • 1996 Honors Student (1996-2000) University of North Carolina at Chapel Hill
  • 2006 Al Gore Scholarship Recipient
  • 2006 Member Alpha Omega Alpha
  • 2014 UCSF Best Faculty Award UCSF Fresno
  • 2015 Pediatric Teaching Award Valley Children’s Hospital
  • 2016 Pediatric Teaching Award Valley Children’s Hospital
  • 2017 CRMC Faculty of the Year Award UCSF Fresno
  • 2018 Best Faculty Teacher 2018 UC Merced San Joaquin Valley PRIME Program, Fresno

Education and Training

  • Dermatology Residency – Medical College of Georgia – Augusta, GA
  • Internal Medicine Internship – Georgetown University – Washington, DC
  • Doctor of Medicine – University of Tennessee at Memphis – Memphis, TN

Licensure & Certifications

  • American Board of Dermatology
  • California State Medical License

Research and Publications

  • O’Connell TD, Swigart PM, McCloskey DT, Simpson GL, Baker AJ, Simpson PC (2003). “Double knockout of the_aA/C- and_a1B-adrenergic receptors reduces heart and myocyte_b-adrenergic responses despite an increase in b-adrenergic receptors” Circulation 108: IV-1
  • O’Connell TD, Ishizaka S, Nakamura A, Swigart PM, Rodrigo MC, Simpson GL, Cotecchia S, Rokosh DG, Grossman W, Foster E, Simpson PC (2003). “The a1A/C- and a1B-adrenergic receptors are required for physiological cardiac hypertrophy in the double-knockout mouse” Journal of Clinical Investigation 111: 1783-1791
  • Simpson GL,Koo, JY. “Bath PUVA Revisited: Advantages, Disadvantages and Techniques” Psoriasis Forum, Spring 2006 Vol. 12, No 1.
  • Simpson GL, Yelverton CB, Rittenberg S, Feldman SR “Do utilization management controls for phototherapy increase the prescription of biologics?” Journal of Dermatology Treatment. 2006; 17(6):359-61. Review.
  • Alan L. Levy, Gregory Simpson, Robert B. Skinner, “Medical Pearl: Circle of Desquamation—A clue to the diagnosis of folliculitis and furunculosis caused by Staphylococcus aureus” /> JAAD, December 2006 (Vol. 55, Issue 6, Pages 1079-1080)
  • Simpson GL, Sheehan DJ. “Sarcoidosis” Southeastern Consortium 10/08
  • Simpson GL, Lesher JL. “Verrucous Sarcoidosis” Southeastern Consortium 10/08
  • Simpson GL, Davis LS, Guill M. “Sarcoidosis” Southeastern Consortium 10/08
  • Simpson GL, Lesher JL. “Necrobiosis Lipoidica” Southeastern Consortium 10/08
  • Simpson GL, Davis LS, Sheehan DJ. “Epidermolysis Bullosa Acquisita” Southeastern Consortium 10/08
  • Simpson GL, Lesher JL, Sheehan DJ. “Sarcoidosis” 55th Annual Zola Cooper Seminar 2008
  • Yentzer BA, Yelverton CB, Simpson GL, Simpson JF, Hwang W, Balkrishnan R, Feldman SR.“Paradoxical effects of cost reduction measures in managed care systems for treatment of severe psoriasis”Dermatology Online Journal. 2009 Apr 15; 15(4):1.
  • Kannan, Swati; Simpson, Gregory L; Sheehan, Daniel J; Lesher, Jack L Jr. “Giant verrucous nodules in a patient with tuberculosis” The American Journal of Dermatopathology. 31(6):591-593, August 2009.
  • Parachuru LV, Simpson GL, Davis, LD. “Secondary Syphilis” 56th Annual Zola Cooper Seminar 2009 accepted for publication.
  • Paul Haun, Gregory L. Simpson, Joshua Wharton, Daniel J. Sheehan. “Acute mental status change in an Immunocompromised patient” Clinical Infectious Diseases. 2010; 50:395-396.
  • Roffwarg D, Brown A, Alisangco M, Davis LS, Simpson G.”Bullous lesions with scarring and mutilation” JAAD 2010 Feb; 62(2):e9
  • Shroff A, Simpson G. Cutaneous manifestations of thyroid disease: a case of thyroid-induced myxedema. Case Rep Dermatol Med. 2011
  • Cohen SF, Simpson GL, Pruritic scaly plaques in a 75-year-old Hispanic man. Enterobius vermicularis (pinworm). Arch Dermatol. 2012 Sep 1; 148 (9): 1073
  • Pamela Sheridan, DO, Babu Singh, MD, and Gregory Simpson, MD. “A skin lesion in a migrant worker: J Am Acad Dermatol 2015;72:e1.0190-9622
  • Mosaab Mohameden, MD, University of California San Francisco Fresno; Uyen Ngoc Mui, MD, University of California San Francisco Fresno; Brady Bleicher, MD, University of California San Francisco Fresno; Gregory Simpson, MD, UCSF Fresno Dermatology Division Director. “Facebook as a portal for psoriasis patients’ education: An invitation for dermatologists to participate”Journal of the American Academy of Dermatology, Volume 76, Issue 6, AB138

Department Affiliations

UCSF Fresno Department of Internal Medicine