Khristina Ramirez is the BEST pediatrician we've been to! We moved down to Ahwatukee in 2012 with our 6 year old. Usually it takes several tries at any doctors office to find your "home". I immediately knew I loved her! She always takes the time to answer questions and she's always very pleasant. We recently had her second child and he had some food allergies and she's been so helpful with giving me steps to you. I would definitely recommend her to anybody!
I read some other reviews so I thought I'd comment. Yes, there can be a longer wait time, that's the downside but she's worth it because she takes her time with each patient.