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Medical, Surgical & Cosmetic Dermatology

Medical Staff
Catherine A. Biren, M.D., M.P.H.
Catherine A. Biren, M.D., M.P.H., FAAD


Dr. Biren is a graduate of the University of California, Los Angeles, where she earned a B.A. degree in Biology in 1975 and a Master of Public Health (M.P.H.) degree in Environmental and Nutritional Sciences in 1976. In 1980, she obtained her medical degree from Northwestern University Medical School located in Chicago, Illinois. Following numerous years of additional medical training at the University of California, Los Angeles, Mount Zion Hospital and Medical Center and the University of California, Irvine, Dr. Brien became board certified by the American Academy of Dermatology in 1987.

In 1989, Dr. Biren opened her own private dermatology practice. For the past 29 years, she has proudly served the residents of Modesto and Oakdale, California, offering them an extensive series of treatments and products designed to make their skin look younger and more radiant.

Professional Affiliations

Fellow of American Academy of DermatologyAmerican Society of Dermatologic Surgery logoNorth American Clinical Dermatologic Society logoInternational Society of Dermatological Surgery logo

American Society of Dermatologic Surgery (ASDS)

North American Clinical Dermatologic Society (NACDS)

 International Society of Dermatological Surgery (ISDS)

 California Medical Society Stanislaus Medical Society

 California Dermatology Society (CDS)

Hospital Staff Appointments

Primary: Doctors Medical Center


 Biren, C., Barr, R., et al: Prolonged Viability of Human Skin Xenografts in Rats by Cyclosporine. J. Invest Dermatol 1986. 86(6)611-4.

 Biren, C. and Barr, R.: Dermatologic Applications of Cyclosporine, Arch Dermatol 1986. 122:1028-1033.

 Rosenkrantz, W., Griffin, C., Barr, R. and Biren, C.: Cyclosporine and cutaneous immune medicated disease (letter). J Am. Acad. Dermatol 1986.   14(6)1088-9.

 Goodman, M., McCullough J., Biren, C. and Barr, R.: A Model of Human Melanoma in Cyclosporine Immune Suppressed Rats. J. Invest Dermatol 88 (2) 141-144.

 Biren, C., Barr, R., et al: Topical Cyclosporine: Effect on Contact Dermatitis in Guinea Pigs, January, 1989.