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Cornerstone Pediatrics 

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James Richard Weidner, MD

James Richard Weidner, MD

Dr. Weidner grew up locally, having been born at Cooper Hospital and raised in Pennsauken, attending high school there. He accomplished his pre-med studies at Franklin and Marshall College, in Lancaster, PA, graduating magna cum laude, majoring in biology with a minor in music. He attended Temple University School of Medicine, receiving election to the Alpha Omega Alpha Honor Medical Society. He completed residency training at...

Denise Bell, MD

Denise Bell, MD, FAAP,  joined Advocare Cornerstone Pediatrics in 2020 with more than 15 years of experience as a primary care pediatrician in South Jersey. After graduating summa cum laude from Drew University with a degree in Spanish Langauge and Culture, Dr. Bell earned her medical degree from Rutgers - New Jersey Medical School. She completed her pediatrics residency at the Children's Hospital of Philadelphia in 2004 and is board certified in general pediatrics by the America...

Lindsay Requa, DO

Lindsay Requa, DO, FAAP,  is board certified by the American Board of Pediatrics and she is a fellow of the American Academy of Pediatrics. Dr. Requa grew up in Pennsylvania where she earned her undergraduate degree from Ursinus College. She majored in biology with a minor in history and played for a National Championship field hockey team - Go Bears! She earned her doctorate from Lake Erie College of Osteopathic Medicine and completed her pediatric residency at Penn State Hershey Chil...

Valerie Horn, DO

Valerie Horn, DO, FAAP is originally from Newtown Square, Pennsylvania. She studied Psychology at The University of Pittsburgh and earned her Masters in Biomedical Sciences at A.T. Still University. Dr. Horn attended medical school at Philadelphia College of Osteopathic Medicine and completed her residency at Crozer Chester Medical Center in 2019. Afterward, she practiced at the Naval Health Clinic in Oak Harbor, Washington, caring for children of active duty service members, and later provided primary care in Anacortes. Now back in Philadelphia, Dr. Horn is excited to join Cornerstone Pediatrics, where she is dedicated to empowering families and helping children thrive as a trusted resource in the community.

Meet Our Providers

Valerie Horn, DO

Valerie Horn, DO, FAAP is originally from Newtown Square, Pennsylvania. She studied Psychology at The University of Pittsburgh and earned her Masters in Biomedical Sciences at A.T. Still University. Dr. Horn attended medical school at Philadelphia College of Osteopathic Medicine and completed her residency at Crozer Chester Medical Center in 2019. Afterward, she practiced at the Naval Health Clinic in Oak Harbor, Washington, caring for children of active duty service members, and later provided primary care in Anacortes. Now back in Philadelphia, Dr. Horn is excited to join Cornerstone Pediatrics, where she is dedicated to empowering families and helping children thrive as a trusted resource in the community.
James Richard Weidner, MD

James Richard Weidner, MD

Dr. Weidner grew up locally, having been born at Cooper Hospital and raised in Pennsauken, attending high school there. He accomplished his pre-med studies at Franklin and Marshall College, in Lancaster, PA, graduating magna cum laude, majoring in biology with a minor in music. He attended Temple University School of Medicine, receiving election to the Alpha Omega Alpha Honor Medical Society. He completed residency training at...

Denise Bell, MD

Denise Bell, MD, FAAP,  joined Advocare Cornerstone Pediatrics in 2020 with more than 15 years of experience as a primary care pediatrician in South Jersey. After graduating summa cum laude from Drew University with a degree in Spanish Langauge and Culture, Dr. Bell earned her medical degree from Rutgers - New Jersey Medical School. She completed her pediatrics residency at the Children's Hospital of Philadelphia in 2004 and is board certified in general pediatrics by the America...

Lindsay Requa, DO

Lindsay Requa, DO, FAAP,  is board certified by the American Board of Pediatrics and she is a fellow of the American Academy of Pediatrics. Dr. Requa grew up in Pennsylvania where she earned her undergraduate degree from Ursinus College. She majored in biology with a minor in history and played for a National Championship field hockey team - Go Bears! She earned her doctorate from Lake Erie College of Osteopathic Medicine and completed her pediatric residency at Penn State Hershey Chil...

Valerie Horn, DO

Valerie Horn, DO, FAAP is originally from Newtown Square, Pennsylvania. She studied Psychology at The University of Pittsburgh and earned her Masters in Biomedical Sciences at A.T. Still University. Dr. Horn attended medical school at Philadelphia College of Osteopathic Medicine and completed her residency at Crozer Chester Medical Center in 2019. Afterward, she practiced at the Naval Health Clinic in Oak Harbor, Washington, caring for children of active duty service members, and later provided primary care in Anacortes. Now back in Philadelphia, Dr. Horn is excited to join Cornerstone Pediatrics, where she is dedicated to empowering families and helping children thrive as a trusted resource in the community.

James Richard Weidner, MD

Dr. Weidner grew up locally, having been born at Cooper Hospital and raised in Pennsauken, attending high school there. He accomplished his pre-med studies at Franklin and Marshall College, in Lancaster, PA, graduating magna cum laude, majoring in biology with a minor in music. He attended Temple University School of Medicine, receiving election to the Alpha Omega Alpha Honor Medical Society. He completed residency training at...

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