About Us


Request an Appointment

New Patients

(520) 626-0962

Exisiting Patients

(520) 694-8888


Petersen Clinics is part of the Department of Medicine’s division of Infectious Diseases and collaborates with Banner Health Network to provide clinical care for people living with or at risk for HIV

The Petersen Clinics use a multi-disciplinary team approach to provide patients with comprehensive HIV specialty care. Our team is comprised of Infectious Disease specialists, Pharmacists specializing in HIV medicine and highly experienced health professionals serving as Clinical Coordinators, Medical Case Managers, and Early Interventionists.

Meet our Team

Infectious Disease Attending Physicians 

Dr. Elizabeth Connick, MD

Dr. Lori Fantry, MD, MPH

Dr. Anca Georgescu, MD

Dr. Steven Klotz, MD

Dr. John Po, MD, PHD

Dr. Tirdad Zangenh, DO

Infectious Disease Fellows

Dr. Jessica August, MD

Dr. Norm Beatty, MD

Dr. Summaya Farran, MD

Dr. Catalin Florita, MD


Clinical Pharmacists

Connie Chan, PharmD, BCPS

Kristen Ellis, PharmD, BCPS

Lawrence York, PharmD, BCPS, AAHIVP


Early Interventionists

Krystal Fimbres


Medical Case Managers

Michael Castaneda

Andrea Ibarra

Jai Smith


Clinical Coordinators

Sascha Bianchi

Brett Deschambre, MPH

Cesar Egurrola



Alyssa Guido, MPH

Ruth Hillman

Britt Nigon, MPH

Shannon Smith, MBA

Andrea Verdin, MSW

Joanne Wolf

Use these links to learn more about Department of Medicine's Division of Infectious Disease and Pediatric Infectious Disease or about the Banner Infectious Diseases Department