Portrait of William Simmons
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William Simmons, MD

He | Him | HisInfectious Diseases
Infectious Diseases Parnassus
415-353-2626
Portrait of William Simmons
Portrait of William Simmons
ucsf logo

William Simmons, MD

He | Him | HisInfectious Diseases
Infectious Diseases Parnassus
415-353-2626

On this page

About me

Dr. William Simmons is an infectious disease specialist who cares for patients with complex conditions, including serious bacterial infections in the bloodstream and infections related to surgically implanted devices and hardware. He treats patients in both the clinic and the hospital.

Simmons' research focuses on how to use antibiotics to both improve outcomes for patients and reduce the development of antibiotic-resistant bacteria.

Simmons earned his medical degree at the Columbia University Vagelos College of Physicians and Surgeons. He completed a residency in internal medicine at Massachusetts General Hospital and a fellowship in infectious diseases at the University of Washington School of Medicine.

Education & training

Board certification

  • Infectious Disease, American Board of Internal Med/Infectious Disease
  • Internal Medicine, American Board of Internal Medicine

Residency

  • Internal Medicine, Massachusetts General Hospital GME

Internship

  • Internal Medicine, Massachusetts General Hospital GME

Degree

  • MD, Columbia University College of Physicians and Surgeons

My expertise

Locations

    My research

    Reviews

    Average rating

    4.8
    4.8 out of 5 Stars
    49 ratings
    About provider reviews

    Showing 1-6 of 12 reviews

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    • 5 out of 5 Stars
      December 28, 2025

      Dr Will Simmons is great

    • 4.7 out of 5 Stars
      November 7, 2025

      Buena

    • 5 out of 5 Stars
      August 25, 2025

      Will Simmons is one of the best listeners and carefully based his decisions on my situation. Kindly explaining both his thought process in choosing a treatment plan and awareness of me as an individual.

    • 5 out of 5 Stars
      June 14, 2025

      Always fantastic communication from my drs

    • 5 out of 5 Stars
      April 24, 2025

      Doctor Will and this team are excellent care providers! A blessing in my life. They elicit the emotion of gratitude.

    • 5 out of 5 Stars
      November 22, 2024

      Dr Simmons is very caring and is excellent

    Please check with your health insurance plan regarding coverage for this type of care. Not all providers at UCSF Health are covered by every insurance plan.

    For informational purposes only, a link to the federal Centers for Medicare and Medicaid Services (CMS) Open Payments web page is provided here. The federal Physician Payments Sunshine Act requires that detailed information about payment and other payments of value worth over ten dollars ($10) from manufacturers of drugs, medical devices, and biologics to physicians and teaching hospitals be made available to the public.