Dr. Melissa DeFilippis is a child psychiatrist in the Clear Lake area who specializes in autism and related disorders (she treats everything but she has a great deal of knowledge about behavior management of kids on the spectrum, OCD and anxiety). She is with UTMB and has an office in Webster. Speaking from my own experiences, Dr. DeFilippis is easy to work with, accessible, and has exceptionally good communications skills with kids (she makes sure not just to speak to the parents in a session, but interacts with the child). She is conservative when it comes to prescriptions.
You do not have to wait weeks or months to get in to see her like some child psychiatrists inside Loop 610. I highly recommend her if you are considering medicating your autistic child to assist with behavior management, anxiety, anger, or aggression.