William R. Ryan, MD


Dr. William R. Ryan is a head and neck surgeon at the UCSF Helen Diller Family Comprehensive Cancer Center. He is skilled in caring for patients with benign and malignant tumors, as well as salivary gland inflammatory disorders, using endoscopic, minimally invasive and traditional surgical techniques. He regularly performs ultrasonography in clinic and in the operating room for his patients. He also has special expertise in transoral robotic surgery, sialendoscopy, sentinel lymph node biopsy and regional facial reconstruction.

Ryan helps direct the Robotic Head and Neck Surgery program, Thyroid and Parathyroid Surgery Clinic and Salivary Gland Surgery Center at UCSF. He is committed to being as accessible as possible to his patients.

Ryan is actively involved in teaching in the UCSF residency and fellowship training programs and UCSF School of Medicine. He also conducts clinical research on the outcomes and other aspects of head and neck surgery, salivary duct surgery, and head and neck radiology. He has authored more than 50 published medical journal articles and several book chapters and is a regular reviewer for the journals Head & Neck, JAMA Otolaryngology – Head & Neck Surgery, and several others.

Ryan earned his medical degree from Stanford University School of Medicine, where he also completed his residency in otolaryngology-head and neck surgery. He then completed a fellowship in advanced head and neck oncologic and endocrine surgery at UCSF. He joined the UCSF faculty in 2011.


Head and Neck Surgery Cancer Clinic
1825 Fourth St., Fourth Floor
San Francisco, CA 94158
Phone: (415) 885–7528
Fax: (415) 885–7711

Hours: Monday to Friday
8 a.m. – 5 p.m.

Salivary Gland Surgery Center at Mission Bay
1825 Fourth St., Fourth Floor
San Francisco, CA 94158
Phone: (415) 885-7528
Fax: (415) 885-7711

Hours: Monday to Friday,
8 a.m. – 5 p.m.

Thyroid and Parathyroid Surgery
1825 Fourth St., Fourth Floor
San Francisco, CA 94158
Phone: (415) 885-7528
Fax: (415) 885-7711

Hours: Monday to Friday, 8 a.m. – 5 p.m.

Conditions & Treatments

Board Certification

Otolaryngology, American Board of Otolaryngology

Academic Title

Associate Professor

More about William R. Ryan


Stanford University School of Medicine 2005


Stanford University Medical Center 2010


UCSF, Advanced Head and Neck Oncologic Surgery 2011

Selected Research and Publications

  1. Winchester D, Lehman J, Tello T, Chimato N, Hocker T, Kim S, Chang J, Markey J, Yom SS, Ryan W, Mully T, Hodge D, Otley C, Arron S. Undifferentiated Pleomorphic Sarcoma: Factors Predictive of Adverse Outcomes. J Am Acad Dermatol. 2018 May 19.
  2. Ryan WR, Plonowska K. Human Papillomavirus in the Mouth and Throat: More Widespread Than Expected? JAMA Otolaryngol Head Neck Surg. 2018 May 10.
  3. Chan CK, Han AY, Alonso JE, Xu MJ, Mallen-St Clair J, Heaton CM, Ryan WR, Kuan EC, St John MA. Squamous Cell Carcinoma of the Soft Palate in the United States: A Population-Based Study. Otolaryngol Head Neck Surg. 2018 May 01; 194599818771931.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.