Department of Medicine
Infectious Diseases
Division Chief
![[Rajat Madan, MD, PhD]](/sites/default/files/styles/az_medium/public/2026-03/Madan-Rajat-MD-PhD_1-blue_4x5.jpg.webp?itok=dEPEkvuM)
Rajat Madan, MD, PhD
Chief, Division of Infectious Diseases
Professor, Medicine (Tenure Eligible)
Member of the Graduate Faculty
Faculty
Matthew D. Adams, DO
Assistant Clinical Professor, Medicine
Mohanad Al-Obaidi, MD, MPH, FIDSA
Clinical Associate Professor, Medicine
Danielle deMontigny Avila, MD
Associate Clinical Professor, Medicine
Principal Investigator, HIV Clinical Care and HIV Programs
Principal Investigator, Pacific AIDS Education and Training Center – Arizona
Fariba Donovan, MD, PhD, FIDSA, FACP
Associate Professor, Medicine
Researcher, Valley Fever Center for Excellence
Member, BIO5 Institute
Member, Graduate Faculty
Lori Fantry, MD, MPH
Professor, Medicine
Director, HIV Translational Research Program
Director, HIV Clinical and Educational Programs
Medical Director, Pacific AIDS Education Training Center
John N. Galgiani, MD
Director, Valley Fever Center for Excellence
Professor, Medicine and Immunobiology
Professor, BIO5 Institute
Professor, Medicine, College of Medicine – Phoenix
Justin Hayes, MD, MPH
Associate Clinical Professor, Medicine
Co-Director, Antimicrobial Stewardship Program
Monica Hinestroza Jordan, MD
Associate Program Director, Infectious Diseases Fellowship
Assistant Clinical Professor, Medicine
Stephen A. Klotz, MD
Professor, Medicine
Professor, Family and Community Medicine
![[Anita A. Koshy, MD]](/sites/default/files/styles/az_card_image/public/2025-12/Koshy-Anita-MD_INF-DIS-NEURO_2000x2500px.jpg.webp?h=eb337a0b&itok=nO7wW54o)
Anita A. Koshy, MD
Associate Dean, Career Development
Professor, Neurology
Professor, Immunobiology
Professor, Medicine
Professor, BIO5 Institute
Professor, Evelyn F McKnight Brain Institute
Professor, Neuroscience-GIDP
![[Rajat Madan, MD, PhD]](/sites/default/files/styles/az_card_image/public/2026-03/Madan-Rajat-MD-PhD_1-blue_4x5.jpg.webp?h=f6b3faf5&itok=0PdI6doY)
Rajat Madan, MD, PhD
Chief, Division of Infectious Diseases
Professor, Medicine (Tenure Eligible)
Member of the Graduate Faculty
Kathryn Matthias, PharmD, BCIDP
Associate Clinical Professor, Pharmacy Practice & Science
Assistant Professor, Medicine
Saman Nematollahi, MD
Associate Professor, Medicine - (Clinical Scholar Track)
Program Director, Infectious Diseases Fellowship
Assistant Director, Internal Medicine Clerkship
Medical Director, Transplant Infectious Diseases, Banner – University Medicine Tucson
Chinh T. Nguyen, MD
Associate Clinical Professor, Medicine
Service Chief, Infectious Diseases, Southern Arizona VA Health Care System
D. Alexander Perry, MD, MPH
Co-Associate Clinical Director, Infectious Diseases Division
Associate Clinical Professor, Medicine
Director of Outpatient Parenteral Antimicrobial Therapy (OPAT)
Talha Riaz, MD
Assistant Clinical Professor, Medicine
Assistant Clinical Professor, Orthopedic Surgery
Brentin Roller, DO, MPH
Associate Clinical Professor, Medicine
Internal Medicine Residency Site Director, Infectious Diseases, Southern Arizona VA Health Care System
Eduardo Sanchez, MD
Co-Associate Clinical Director, Infectious Diseases Division
Clinical Assistant Professor, Medicine
Joint Faculty
Katherine (Kate) Ellingson, PhD
Assistant Professor, Public Health
Assistant Professor, Medicine
Assistant Professor, Animal and Comparative Biomedical Sciences
Stephen A. Klotz, MD
Professor, Medicine
Professor, Family and Community Medicine
Anita A. Koshy, MD
Associate Dean, Career Development
Professor, Neurology
Professor, Immunobiology
Professor, Medicine
Professor, BIO5 Institute
Professor, Evelyn F McKnight Brain Institute
Professor, Neuroscience-GIDP
William D. Lainhart, PhD, D(ABMM)
Professor, Department of Pathology - (Clinical Scholar Track)
Professor, Department of Medicine, Division of Infectious Diseases
Medical Director, Clinical and Molecular Microbiology, Banner UMC, Tucson
Purnima Madhivanan, MBBS, PhD, MPH
Associate Professor, Public Health
Associate Professor, Medicine
Associate Professor, Family and Community Medicine
Associate Professor, BIO5 Institute
Kathryn Matthias, PharmD, BCIDP
Associate Clinical Professor, Pharmacy Practice & Science
Assistant Professor, Medicine
David Nix, PharmD, BCPS (AQ-ID)
Professor, Pharmacy Practice and Science
Associate Professor, Medicine
Professor, BIO5 Institute
Scott C. Olson, MD
Associate Professor, Pediatrics – Clinical Scholar Track
Associate Program Director, Pediatric Residency
Patient Safety and Quality Improvement, Pediatric Residency Program
Research Staff
Staff
Connie B. Chan, PharmD, BCPS
Senior Clinical Pharmacist
Team Leader, HIV Treatment Adherence Clinic, Petersen HIV Clinics
Richelle Clemente
Program Coordinator, Infectious Diseases Fellowship
Administrative Associate
Kristen E. Ellis, PharmD, BCPS
Clinical Pharmacist
Team Leader, TeamRx (T-Rex) Pharmacy Group, Petersen HIV Clinics
Krystal R. Fimbres
Program Coordinator, Senior - EIS/HIV Telemed
Alyssa Ann Guido, MPH
Program Director, HIV Programs and PAETC Arizona
M. Monique Murillo
Health Care Partner
Clinical Associate Director
Lawrence David York, PharmD, BCIDP, BCPS, AAHIVP
Clinical Pharmacist, Infectious Diseases and HIV/AIDS