I have known Dr. Quintero for about 10 years. He is an excellent Family Doctor. He is the type of doctor who listens and cares. Throughout the years, I have met many of his patients. They all say the same thing– Dr. Quintero is a wonderful person and doctor. I have also referred friends, both English and Spanish speaking to him. They have unanimously given him high marks. I think he is one of the last few Family Doctors who puts his patients needs first. His office is in Santa Ana and I am pretty sure he takes walk ins. His staff is very nice and helpful. For those without medical insurance, he has a great cash fee schedule.