Portrait of Hailyn Nielsen
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Hailyn Nielsen, MD, PhD

She | Her | HersRheumatology
Rheumatology Parnassus
415-353-2497
Portrait of Hailyn Nielsen
Portrait of Hailyn Nielsen
ucsf logo

Hailyn Nielsen, MD, PhD

She | Her | HersRheumatology
Rheumatology Parnassus
415-353-2497

On this page

About me

Dr. Hailyn Nielsen is a rheumatologist who cares for patients with autoimmune, autoinflammatory and arthritic conditions. When not working with patients, she is working in the lab to better understand how the immune system functions.

Nielsen earned her medical degree and a doctorate in molecular microbiology and microbial pathogenesis at Washington University School of Medicine in St. Louis. She completed a residency in internal medicine and a fellowship in rheumatology at UCSF.

Education & training

Board certification

  • Rheumatology, American Board of Internal Medicine
  • Internal Medicine, American Board of Internal Medicine

Fellowship

  • Rheumatology, UCSF Graduate Medical Education

Residency

  • Internal Medicine, UCSF Graduate Medical Education

Internship

  • Internal Medicine, UCSF Graduate Medical Education

Degree

  • MD, Washington University School of Medicine in St. Louis

My expertise

Locations

    Reviews

    Average rating

    4.9
    4.9 out of 5 Stars
    54 ratings
    About provider reviews

    Showing 1-6 of 13 reviews

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    • 5 out of 5 Stars
      November 20, 2025

      Dr. Nielsen has been amazing in managing my condition.

    • 5 out of 5 Stars
      November 13, 2025

      Doctor Nielsen is very kind, patient and thorough.

    • 5 out of 5 Stars
      September 4, 2025

      As a patient of Dr. Nielsen I have to say that she is always attentive to my concerns and is careful about my treatment.

    • 5 out of 5 Stars
      May 29, 2025

      Dr Nielsen is very patient with me

    • 5 out of 5 Stars
      February 22, 2025

      Dr. Nielsen is a very caring and knowledgeable doctor. I feel lucky to be in her care for my autoimmune issues.

    • 5 out of 5 Stars
      February 17, 2025

      Dr. Nielsen was extremely kind, caring, and knowledgeable. She listened to everything I had to say and was very articulate when answering my questions. Not once did I feel rushed or not listened too. She spent over an 1 1/2 hours listening, evaluating, and answering my questions. By far one of the best doctors I have had.

    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.