Physicians of PASA

Specializing in the care of patients with Pulmonary Diseases, Critical Illness and Sleep Disorders

  • Aaronson, Robert – MD, FACP, FAASM

    Undergraduate: Columbia College
    Medical School: New York University
    Internship: University of California, San Francisco
    Residency: University of California, San Francisco
    Fellowship: Pulmonary, Boston University Hospitals
    Critical Care, Boston University Hospitals


  • Chazal, Ives de – MD, FACP, FCCP

    Undergraduate: University of Oruro, Bolivia
    Medical School: National University of La Plata | Buenos Aires, Argentina
    Residency: Creighton University, Omaha Nebraska
    Critical Care: Mayo Graduate School of Medicine, Rochester Minnesota Pulmonary, Univ. of Minnesota


  • Choi, Chang-Kun Charles – DO, MS, FCCP

    Undergraduate: Arizona State University
    Medical School: Midwestern University
    Internship: Banner University Medical Center, Phoenix
    Residency: Banner University Medical Center, Phoenix
    Fellowship: Banner University Medical Center, Phoenix
    Critical Care: Presbyterian Medical Group


  • Alanna Neves, AG-ACNP
    Neves, Alanna – AG-ACNP
    BSN Nursing: Northern Arizona University
    Masters: Grand Canyon University

  • Pacheco, Francisco – MD, FCCP

    Undergraduate: Catholic University
    Medical School: Universidad Central del Caribe
    Residency: St. Vincent’s Hospital & Medical Center
    Chief Residency: St. Vincent’s Hospital & Medical Center
    Residency: Long Island Jewish Medical Center
    Fellowship: New York Presbyterian Hospital


  • Reyes, Nathanial – MD
    Undergraduate: Syracuse University
    Medical School: New York University School of Medicine
    Internship: Baptist Health System Internal Medicine, Birmingham
    Residency: Chief residency Baptist Health System Internal Medicine, Birmingham
    Fellowship: University of Arizona, Tucson
    Pulmonary, Critical Care, University of Arizona

  • Rotkis, Thomas – MD, Phd, FACSM

    Undergraduate: Stanford University
    Medical School: University of Southern California
    Graduate School: Phd, Exercise Physiology, University of Arizona
    Internship: University of Arizona
    Residency: University of Arizona
    Fellowship: University of Arizona


  • Dr Felmer Stewart
    Stewart, Felmer – CRNP, FNP
    BSN Nursing: Penn State University
    Masters: Penn State University