Union Square Medical Associates

Tickborne Disease Specialists

Lyme and its associated tickborne diseases are on the rise. Dr. Stricker and associates can help get you on the road to feeling better. Dr. Stricker is the President-Elect of the International Lyme Disease Association and one of the world's foremost experts on Lyme, having authored hundreds of research articles on the subject. Contact us today for screening.


450 Sutter Street
Suite 1504
San Francisco, CA, 94108


Telephone: (415) 399-1035
Fax: (415) 399-1037

Hours: Monday-Friday, 9AM-5PM


Raphael B. Stricker, M. D.

Dr. Stricker received his medical degree and training in Internal Medicine at Columbia University in New York. He did sub specialty training in Hematology/Oncology at the University of California San Francisco, and supplemental training in Immunology and Immunotherapy at California Pacific Medical Center in San Francisco.

Dr. Stricker is a member of the American Society of Hematology (ASH), the Federation of Clinical Immunology Societies (FOCIS), the International Council on Infertility Information Dissemination (INCIID) and the International Lyme and Associated Diseases Society (ILADS).

He is a recipient of the American Medical Association Award for Physician Excellence, and he has authored over 100 medical journal articles and abstracts. Areas of special interest include immunologic infertility, immunodeficiency, coagulation disorders and tick borne diseases.

Melissa McElroy, FNP-BC

Melissa is a board certified Family Nurse Practitioner. Melissa received her B.S. in Medical and Public Health Microbiology, and Minor in Biotechnology from Cal Poly San Luis Obispo, where she conducted research with attenuated influenza virus H1N1 in the Undergraduate Biotechnology Laboratory. Her research was published for use as a Virology Laboratory currently implemented in the Cal Poly curriculum.

Melissa received her B.S.N. from Samuel Merritt University, graduating Summa Cum Laude. She worked as a registered nurse for a UCSF Dermatology Professor, prior to receiving her M.S. in Nursing as a Family Nurse Practitioner from Georgetown University. Aside from working at USMA, Melissa currently practices as an NP at an urgent care clinic on weekends.

Melissa is member of the California Association for Nurse Practitioners (CANP), American Association of Nurse Practitioners (AANP), American Nurses Association (ANA), Dermatology Nurses Association (DNA), and the International Lyme and Associated Diseases Society (ILADS).