J. Blake Tyrrell, MD


Dr. J. Blake Tyrrell is an endocrinologist who specializes in treating adrenal disease and pituitary disease. He received his medical degree from the University of Toronto's Faculty of Medicine. Tyrrell did his residency training in internal medicine at the University of California, San Francisco, where he also completed a fellowship in endocrinology. Tyrrell is board certified in internal medicine as well as endocrinology and metabolism.


California Center for Pituitary Disorders
400 Parnassus Ave., Eighth Floor
San Francisco, CA 94143
Phone: (866) 559-5543
or (415) 353-7500
Fax: (415) 353-2889

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

Endocrinology Clinic at Parnassus
400 Parnassus Ave., Suite A-550
San Francisco, CA 94143
Phone: (415) 353–2350
Fax: (415) 353–2337

Hours: Monday to Friday, 8:30 a.m. – 5 pm.

Conditions & Treatments

Academic Title


More about J. Blake Tyrrell


University of Toronto 1966


UCSF, Internal Medicine 1969


UCSF, Endocrinology 1975

Selected Research and Publications

  1. Bailey K, Yazdi T, Masharani U, Tyrrell B, Butch A, Schaufele F. Advantages and Limitations of Androgen Receptor-Based Methods for Detecting Anabolic Androgenic Steroid Abuse as Performance Enhancing Drugs. PLoS One. 2016; 11(3):e0151860.

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.