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About Us

We currently have five full-time licensed pediatricians working at Tucson Central Pediatrics. They are all members of the American Academy of Pediatrics, and are on staff at UMC, TMC, and St. Joseph’s Hospital.

Team & bio

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    Pamela K. Black-Davis, M.D.

    Dr. Black-Davis is an experienced board certified pediatrician who has been in practice in Tucson for over 20 years. She is originally from Arkansas and received her education at the University of Arkansas and Arkansas Children’s Hospital, one of the premier children’s hospitals in the country. She has interests in working with all types of health issues with children and enjoys working with behavioral problems and asthma. She is active in the American Academy of Pediatrics and the Pima County Pediatric Society. She is married to Richmond Davis and has two sons, three stepdaughters and one grandson. When not working full time she enjoys golf, cooking, quilting, church and many family activities.

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    Regina Frisby, M.D.

    Dr. Frisby was born in Cumpas, Sonora, Mexico. Her primary education was in Mexico. She then completed her pediatric residency at St. Joseph’s Hospital in Phoenix. She settled in Tucson in 1990, working at Tucson Medical Associates, Thomas-Davis Medical Center, and has been with Tucson Central Pediatrics since1998. She is fluent in Spanish and English. Dr. Frisby is from a large family and enjoys spending time with them. She loves the opera, swimming and traveling.

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    Robert Hom, M.D.

    Dr. Hom was born and raised in Baltimore, Maryland. He graduated from college at the University of Maryland in 1988 with a degree in microbiology. He also attended medical school at the University of Maryland, graduating in 1992. He then completed his pediatric residency at UCLA Medical Center, where he met his wife Sarah. After finishing his training in 1995 he moved to Tucson where he worked for Thomas-Davis Medical Centers for three years before opening Tucson Central Pediatrics in 1998. Dr. Hom also serves as the chief administrator of the clinic. He is very blessed with four wonderful children, 2 girls, Rachel and Emily, and twin boys, Andrew and Daniel. In his free time he enjoys tennis, reading, working around the house and spending time with his family.

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    Gretchen Hull, M.D.

    Dr. Hull was born in California, but grew up in Tucson. She graduated from Brown University in 1993 and attended medical school at the University of Arizona, graduating in 1999. She completed her pediatric residency at Childrens Hospital Los Angeles in 2002 and has worked here at Tucson Central Pediatrics since. She is currently on the boards of the Arizona Chapter of the American Academy of Pediatrics and of Parent Aid, an organization dedicated to preventing child abuse. Dr. Hull is the oral health advocate for the Arizona Chapter of the AAP. She volunteers throughout the year with the Flying Samaritans in Baja California Sur and has been on several international medical trips to countries such as Guatemala and India. She speaks Spanish. Her hobbies include photography, travel and studying foreign languages.

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    Sivapriya Ramakrishnan, M.D.

    Dr. Ramakrishnan went to medical school in Chennai, South India. Her initial pediatric training was in the United Kingdom where she was a member of the Royal College of Pediatrics and Child Health. She moved to the USA in 2004, and completed her residency at the Brooklyn Hospital Center in New York. Dr. “Rama” as she is known to us, served as chief resident and was awarded the best resident for courtesy, respect, and professionalism. In her free time, she loves to read, spend time with her family, and food blog. Dr. Rama is a board certified pediatrician and has 15 years experience. She works with all types of health issues concerning children, and enjoys newborn care and working with adolescents. She worked in Virginia for three years in both a private setting, and in student health at UVA. She moved here in the summer of 2012 with her husband and two children. Dr. Rama is accepting new patients.