P. Jan Geiseler

Associate Professor of Clinical Medicine

Areas of treatment:

Infections in Immunocompromised Hosts
Primary Care of HIV-Infected Patients


  • Infectious Disease


  • Department of Medicine


  • English
  • French
  • German
  • Spanish

P. Jan Geiseler, MD

Associate Professor of Clinical Medicine

Practicing locations:

  • Keck Hospital of USC
  • USC Healthcare Center 2

About this doctor:

Dr. Geiseler has been a prominent clinician and educator in the Infectious Diseases Division for many years. He consistently maintains a sizable caseload of consultation patients at Keck Hospital of USC, a portion of which serves as a teaching service for clinical fellows. At Keck Hospital of USC and USC Norris Comprehensive Cancer Center, Dr. Geiseler is able to tirelessly prepare fellows in the practice of Infectious Disease consultation for such frequently complex patients as those with associated oncologic, transplant-related and orthopedic problems.

In addition to inpatient consultation, Dr. Geiseler maintains an ongoing interest in emporiatrics (travel medicine) as well as the evaluation of patients with fever of unknown origin.


Doctor of Medicine, University of Buenos Aires, School of Medicine, 1969


Graduate Hospital of the University of Pennsylvania, 1970 - 1971


Graduate Hospital of the University of Pennsylvania, Internal Medicine, 1971 - 1972
University of Maryland Hospital, Internal Medicine, 1972 - 1973


University of Illinois Hospital, Infectious Disease, 1976 - 1978


American Board of Internal Medicine: Internal Medicine
American Board of Internal Medicine: Infectious Diseases

Professional society memberships:

American Society for Microbiology
American Federation for Clinical Research
American College of Physicians
Infectious Diseases Society of America


Graduated from Medical School with Honor Diploma, University of Buenos Aires School of Medicine, 1969