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. Our program was ranked 3rd in the nation out of 142 academic hospitals for excellence in care.  Our program provides outpatient and inpatient care at an afforadable price for all HIV-infected adults, plus testing, education and couseling services to patients and their families. 

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. Justin Hayes, MD
  • Dr. Stephen Klotz, MD
  • Dr. John Po, MD, PHD
  • Dr. Tirdad Zangeneh, DO

Infectious Disease Fellows

  • Dr. Jessica August, MD
  • Dr. Norm Beatty, MD

PrEP Management

  • Desiree Golden, NP

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 Dechambre, 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