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 School of Medicine -GME

Residency

  • Internal Medicine, UCSF School of Medicine -GME

Internship

  • Internal Medicine, UCSF School of Medicine -GME

Degree

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

Academic title

  • Adjunct Professor

My expertise

Locations

    Reviews

    Average rating

    4.6
    4.6 out of 5 Stars
    60 ratings
    About provider reviews

    Showing 1-6 of 18 reviews

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    • 5 out of 5 Stars
      July 25, 2026

      The doctor spent a long going over medical history and discussing the very complicated course of my medical treatments and conditions. She spent about as much time on those problems as any doctor ever has

    • 5 out of 5 Stars
      July 23, 2026

      Dr Nielsen is always very patient and care

    • 4.9 out of 5 Stars
      July 17, 2026

      The Dr is awesome. Takes the time, shows concern and really tries to get the whole picture

    • 5 out of 5 Stars
      May 17, 2026

      Dr, Nielsen Is a true professional. I enjoy seeing her to discuss my autoimmune issues. She is caring, very smart and proactive in my care. I feel truly lucky to have her as my rheumatologist.

    • 2.8 out of 5 Stars
      January 15, 2026

      Provider should express more concern when patient shares worries of other possible health problems instead of saying it's not in their expertise

    • 5 out of 5 Stars
      November 20, 2025

      Dr. Nielsen has been amazing in managing my condition.

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