Our Physicians

Dr. Donald Kay, M.D.

Donald M. Kay, M.D., has been a practicing Dermatologist and Dermatologic Surgeon in the Burlingame area for many years. He is on the active staff at Mills-Peninsula Hospital, the courtesy staff at SF General Hospital and serves as Clinical Professor of Dermatology at UCSF. At SF General he is an Attending Physician in Dermatology. In 2009 Dr. Kay received a Special Recognition Award from the Clinical Faculty Association at UCSF. He is certified by the American Board of Dermatology and holds a Special Competence Certificate in Dermatopathology.

Following undergraduate studies at UCLA, Dr. Kay received his BS and MD degrees from UCSF School of Medicine. He then served a one-year internship in Internal Medicine at Wadsworth VA Hospital in Los Angeles, served three years as a Medical Officer in the US Air Force, followed by three years of Dermatology residency at UCSF.

He is a member of many local and national Dermatologic societies and has served on the Board of Directors of the San Mateo County Medical Society. Dr. Kay is also a community leader and has served seven years as an elected Trustee to the Burlingame School District.

Dr. Nikolajs Lapins, M.D.

Nikolajs A. Lapins was born in Riga, Latvia, and was a Phi Beta Kappa graduate of the University of Washington. He is a graduate of the University of Washington School of Medicine. A residency in dermatology was completed at Brooke Army Medical Center, followed a year later by a fellowship in dermatopathology at the Armed Forces Institute of Pathology. A final fellowship in Mohs micrographic surgery and dermatologic surgery was completed at the University of California San Francisco.

Dr. Lapins was the first Mohs surgeon in the United States Army Medical Corps. He was the chief of dermatologic surgery at Letterman Army Medical Center for many years, retiring as a full colonel in 1989. Since that time, he has been in private practice in the Bay Area, and now practices exclusively in Burlingame. Dr. Lapins has a wide range of interests in dermatology, but is particularly known for Mohs micrographic surgery for problem skin cancers.

Dr. Lapins is a full clinical professor in the dermatology department at University of California San Francisco. He is a member of many local and national medical organizations.

He is fluent in Latvian.

Dr. Karen Keller, M.D.

Karen L. Keller, M.D. was born and raised in Miami, Florida. Dr. Keller completed her undergraduate studies at Emory University in Atlanta, Georgia. She received her M.D. from the University of Miami School of Medicine, and subsequently completed a year of Internal Medicine Internship and three years of Dermatology Residency at the University of South Florida.

After completing her Residency, Dr. Keller practiced Dermatology in South Florida for six months, and then followed her heart to the San Francisco Bay area. In February 1999, she joined Peninsula Dermatology in Burlingame, California as a full-time Dermatologist, certified by the American Board of Dermatology. Dr. Keller has had several articles published concerning wound healing, skin cancers and vitamins.

Dr. Keller is a well-respected Member of the following:

She enjoys general adult and pediatric Dermatology as well as her cosmetic practice, in which she injects BOTOX®, Juvéderm® and Restylane® and performs sclerotherapy. She likes to hike, ski, read, travel and spend time with her husband, Rob, and her sons, Joshua and William.

Dr. Keller has written a book called "It's Bedtime, Joshua". To find out more about the book, please click here.

Dr. Janet Maldonado, M.D.

Janet Maldonado is originally from Chappaqua, New York. She moved to California for college where she was a Phi Beta Kappa graduate of Stanford University. She was awarded a Fullbright Scholarship to perform immunology research in Madrid, Spain. Dr. Maldonado graduated from Harvard Medical School and returned to Stanford University for her internship in Internal Medicine. She completed her residency in Dermatology at the University of California San Francisco where she was chief resident.

Dr. Maldonado is board certified in Dermatology and is a Fellow of the American Academy of Dermatology and the American Society for Dermatologic Surgery. A member of the National Rosacea Society, Pacific Dermatologic Society and the American Society of Cosmetic and Aesthetic Surgery. She is an Assistant Clinical Professor in the Department of Dermatology at the University of California San Francisco.

Dr. Maldonado enjoys all aspects of Dermatology and Dermatologic Surgery and has a special interest in the evaluation of pigmented lesions and early detection of melanoma.

Dr. Maldonado is an accomplished violinist and holds a black belt in karate. She loves to dance, play sports, travel and spend time with her husband, Steve, and two daughters, Natalia and Julia. She is fluent in Spanish.

Dr. Maldonado-Knapp M.D.

Dr. Maldonado-Knapp, M.D. is a board -certified dermatologist who has been in private practice in Monterey, CA for almost 20 years. She has recently relocated to the Bay Area and is very excited to be a part of Peninsula Dermatology. Dr. Maldonado-Knapp obtained a B.A. magna cum laude in Molecular Biology and Biophysics from Yale University in 1985 and was awarded a Fulbright Scholarship to study Molecular Biology at the European Molecular Biology Laboratory in Heidelberg, Germany. Dr. Maldonado-Knapp graduated from Stanford Medical School in 1991 receiving High Honors for her research in medical immunology. She completed her internship in Internal Medicine and then her Dermatology residency at Stanford University Medical Center in 1996.

Dr. Maldonado-Knapp has almost 20 years of experience in the management of medical and surgical conditions of the skin, hair, and nails for adults and children. She is also an expert in a wide range of cosmetic procedures including, Botox, lasers and a variety of fillers, including Voluma. Dr. Maldonado-Knapp prides herself in providing outstanding patient care and enjoys developing long-term relationships with her patients.

Dr. Maldonado-Knapp, M.D. is a Fellow of the American Academy of Dermatology and a member of the American Society for Cosmetic Dermatology and Aesthetic Surgery. She has appeared numerous times on local television discussing skin care issues and enjoys mentoring aspiring medical students.

Dr. Maldonado-Knapp has been happily married for over 26 years to a product design engineer and has two wonderful college-aged daughters. She enjoys hiking, biking, and traveling.

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