I am a retired R.N. with many years’ experience in hospitals and doctor’s offices. I am impressed with Dr. Castellanos and his office staff. I was seen within a few moments of entering his office. The tech that did my ECG, BP and paperwork was quick, courteous and efficient. Dr. Castellanos was knowledgeable, gracious, and thorough. He explained problems with my ECG clearly, ordered an echogram of my heart, which they were able to do while I was there. When I got home, a few hours later, there was a message on my phone from Dr. Castellanos re my echogram findings with a phone number to call if I had any questions. Medical care doesn’t get any better than that. I am so pleased to have found this doctor. I highly recommend him.