Infectious Disease

Frederick Alexander, MD

Joliet, IL

Dr. Frederick S. Alexander, MD, is an infectious disease specialist practicing in Joliet, Illinois, with over 40 years of experience treating a broad spectrum of infectious conditions. He focuses on managing complex infections, including those requiring specialized antibiotic therapy, and emphasizes antibiotic stewardship to combat antimicrobial resistance. His practice serves adult patients, including those with refractory or hospital-acquired infections, as evidenced by his affiliations wi

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Credentials

Board Certifications

Internal Medicine (ABIM)
Infectious Disease (ABIM)

Education & Training

Medical School: University of Illinois College of Medicine (MD, 1982)
Residency: Lutheran General Hospital (Internal Medicine, 1983-1985)
Fellowship: Loyola University Medical Center (Infectious Disease, 1985-1987)

Years in Practice

30+ years

Peer Recognition

Castle Connolly — Top Doctor
2026

Clinical Focus

Subspecialties

Clinical Infectious Disease

Conditions & Treatments

Travel MedicineHIV/AIDSTuberculosisHepatitis CHepatitis BAntimicrobial StewardshipSepsis & Critical Care

Insurance(s) Accepted

90 Degree BenefitsASR Health Benefits

AetnaAllegiance Health Plans

Ambetter

Please verify your coverage with the provider — plan participation can change.

Practice Details

Hospital Affiliations

Silver Cross Hospital
Ascension Saint Joseph-Joliet
Morris Hospital & Healthcare Centers

Languages

English, Spanish

Conditions Dr. Alexander treats

Insurance accepted

Frequently asked

Does Dr. Alexander accept 90 Degree Benefits insurance?

Frederick Alexander's public profile lists 90 Degree Benefits, ASR Health Benefits, and Aetna plus 47 more health plans as accepted plans. Plan participation can change — confirm directly with the practice before your visit.

Where does Dr. Alexander practice?

Frederick Alexander practices in Joliet, IL with hospital affiliations including Silver Cross Hospital, Ascension Saint Joseph-Joliet, and Morris Hospital & Healthcare Centers.

What does Dr. Alexander specialize in?

Frederick Alexander is a board-certified infectious disease specialist with focus areas in Clinical Infectious Disease.

How long has Dr. Alexander been practicing?

Frederick Alexander has 31+ years of clinical experience in infectious disease.

What is Dr. Alexander's medical training?

Public profile training history includes: Medical School: University of Illinois College of Medicine (MD, 1982); Residency: Lutheran General Hospital (Internal Medicine, 1983-1985); Fellowship: Loyola University Medical Center (Infectious Disease, 1985-1987).