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Dr. William Kessinger  M.D., F.A.A.P.

Received his medical degree from Texas A&M University and completed his internship and residency at the University of Oklahoma Medical Center in Oklahoma City, Oklahoma. In 1988, he received the Owen Rennert Award for Excellence in Pediatrics. Dr. Kessinger has been in private practice since 1988, first in Springfield, Missouri and in 1992 started Pediatric Healthcare Associates, P.A. in McKinney. Dr. Kessinger has maintained American Board of Pediatrics Certification since 1989 with recertification in 1997 and 2004. He is a Fellow of the American Academy of Pediatrics. Through the course of his career, Dr. Kessinger has served as the Pediatric Department Chairman of Medical Center of McKinney on several occasions over the years. He is also on the Board of Directors of the Patient Physician Networks, the Board of Directors of the Plano Physician's Group, and serves as chairman of the Physician Steering Committee for the Baylor Medical Center of McKinney. Dr. Kessinger spends his free time sailing.


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Dr. Catherine Frank  M.D., F.A.A.P.

Received her medical degree from The University of Texas Health Science Center at Galveston and completed her pediatric residency at The University of Texas Health Science Center in Houston. Dr. Frank has special interests in allergy, asthma, and adolescent medicine.

Dr. Frank joined Pediatric Healthcare Associates in September of 2001. She is Board Certified and a Fellow of the American Academy of Pediatrics.

Dr. Frank will be accepting new patients starting February 1st, 2014.


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Dr. Nicole  Sutton  M.D., F.A.A.P.

Dr. Sutton attended medical school at the University of Texas Medical Branch at Galveston from 1997until 2001. She completed her Pediatric Residency at The University of Texas Health Science Center at Houston in 2004. After completing her pediatric training, she joined Pediatric Healthcare Associates in the fall of 2004. She is Board Certified in Pediatrics and is a Fellow of the American Academy of Pediatrics since 2004. She has always wanted to be a doctor, but only discovered her love of pediatrics during medical school. Dr. Sutton has served as the Pediatric Department Chairman of Medical Center of McKinney in 2007.

Dr. Sutton grew up in Lewisville, TX and is happy to be back in the DFW area near her family and friends. She is married and has one son. Her personal interests outside of medicine include swimming, reading mystery novels, and spending time with her family and friends.


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Dr. Virginia Menchaca  M.D., F.A.A.P.

Dr. Menchaca has been a life-long Texan. She was born and grew up in Southwest Texas. She was a National Hispanic Scholar in 1991 and graduated from Our Lady of the Lake University of San Antonio with a B. A. in Biology in 1993. She returned to her hometown of Crystal City, Texas and was a 3rd grade teacher for one year before being accepted into medical school. She completed her medical studies at The University of Texas Health Science Center in 1998. Dr. Menchaca remained in Houston and completed her Pediatric Residency in 2001. She has been in private practice since 2001 and joined Pediatric Healthcare Associates in 2005. Her husband, Donas Cole, is very active in the community and is a hospital administrator. In March 2008, they welcomed their first child, Chloe Cole.

Dr. Menchaca's professional interest includes premature infants, preventative care, and genetics. She is Board Certified by the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics.



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Dr. Lilyan Blatt  D.O., F.A.A.P.

She has more than 10 years experience in general pediatrics and received extensive training in pediatrics at DuPont Children's Hospital, Jefferson University and the Medical Center of Delaware. Dr. Blatt earned her undergraduate degree from the University of Connecticut in Genetics, her graduate degree in Health Services at Springfield University in Massachusetts and her medical degree from the University of Medicine and Dentistry of New Jersey. She is board certified in Pediatrics and has been a Fellow of the American Academy of Pediatrics since 1998.



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Dr. Shonalie Leville  MD, F.A.A.P.

Dr. Shonalie Leville joined Pediatric Healthcare
Associates in the Spring of 2013. Dr. Leville received
her medical degree from the University of Minnesota
and completed her pediatric residency at the Medical
College of Wisconsin. She has been in practice since
1999. Dr. Leville enjoys seeing patients of all ages.
She is board certified in Pediatrics and a Fellow of the
American Academy of Pediatrics.



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Sonja Estep  M.S., R.N., C.P.N.P.

Received her Bachelor of Science in Nursing (1974) and Masters of Nursing (1988) from Texas Woman's University. In 1991 she received a Pediatric Nurse Practitioner Certificate from the University of Texas at Arlington. She is Board Certified by the Pediatric Nursing Certification Board, as well as the American Nurses Credentialing Center. In 2001, she was honored as one of TWU's "Great 100 Nursing Alumni", in 2000 received the "PNP of the Year Excellence Award" of Texas and was selected as one of "The Great One Hundred Nurses" in the Dallas-Ft. Worth Area in 1996.