Meet our friendly, experienced pediatricians and staff at LJH Pediatrics! Our entire team is dedicated to helping you and your child feel at home from the moment you walk through the door. We’re proud to be members of the SF community and to serve the needs of their children. We pride ourselves in being an exceptional clinic where children come first! Our child-focused practice works hard to meet the needs of children from infancy through adolescence. Compassionate, knowledgeable and supportive staff is the cornerstone of Langston Pediatrics quality care. All of our pediatricians and medical staff are highly trained professionals, maintaining the highest level of accreditation in pediatrics to address the special needs of infants, children, and teens.

We strive to treat each and every patient as we would want our own children to be treated. Our doctors and staff look forward to building a relationship with you and your family.


Dr. Robert Langston, M.D.  Now retired

Doctor Robert Langston was born in Alabama and was educated in public schools through high school.  He graduated from Huntingdon College in Montgomery with a BS majoring in Psychology.  He received his MD from the University of South Alabama in Mobile. He completed his straight pediatric internship and residency at Los Angeles County/ University of Southern California. He is board certified in Pediatrics and has recertified 3 times and completed maintenance of certification by the American Board of Pediatrics.

He has been in his pediatric practice in San Francisco for 12 years enjoying every minute.

His wife, Kristine, and he have 2 adult children and 3 grandchildren who continue to teach Dr. Langston more about caring for children every day. 

Dr. Katy Johnston, M.D.

Doctor Johnston was born and raised in the San Francisco Bay Area and she spent her childhood in Berkeley. She attended the University of California at Berkeley where she earned her undergraduate degree and a BA in psychology.  She received her medical degree on the East Coast at Albany Medical College and completed her pediatrics residency at UCSD in San Diego CA. Dr. Johnston is a board certified Pediatrician and a fellow of the American Academy of Pediatrics. She joined Robert Langston, MD in his practice in 2011 after working as an outpatient Pediatrician.

She has brought an interest in preventative medicine, nutrition, and developmental pediatrics to the practice, and cherishes becoming an important asset to the lives of her patients and their families.


Dr. Sahar Aminipour, M.D.

Doctor Aminipour was born and raised in Boston, Massachusetts. A product of both public and private education, switching from Belmont public schools to Buckingham Browne & Nichols for Middle and High School. She attended Massachusetts Institute of Technology where she earned her undergraduate degree, SB in Biology. After graduating, she performed research on NeuroAIDS at Massachusetts General Hospital. She then completed a masters in Medical Science at Boston University Medical School. She then matriculated to University of Michigan, where she completed her medical degree. She began her residency at University of Rochester Medical Center/Golisano Children's Hospital. She transferred to Kaiser Permanente Northern California and completed her General Pediatrics Residency in Oakland, CA. Since then she has worked at UCSF Benioff Children's Hospital and Summit Hospital in Oakland, as well as UCSF Benioff Pediatric After Hours Clinic in Oakland and San Francisco.

She joined the practice in March 2019. She works tirelessly to advocate for her patients.  In her free time, she is likely upside down doing Partner Acrobatics or on a foodie adventure.