Joshua LeBlanc, MD, FAAP
Joshua LeBlanc, MD, FAAP grew up in an Air Force family and has lived in 9 different states. He completed medical school at The University of Cincinnati and began his residency at Phoenix Children’s Hospital, but transferred to the University of Tulane after he was married. He has been practicing on the Northshore since completing Tulane/Ochsner Pediatric Residency Program in 2002. He had been in group pediatric practice before opening his own pediatric clinic in June, 2011 and is currently on faculty with Tulane University School of Medicine as Clinical Faculty Instructor of Pediatrics and Clinical Faculty for William Cary University training medical students and residents.
He has held previous leadership positions for which he has won awards, most recently the Frist Humanitarian Award in 2017 given annually by Lakeview Hospital. He recently completed serving on the Executive Committee for the Louisiana Chapter of The American Academy of Pediatrics, as well as serving on pediatric committees at both St. Tammany Hospital and Lakeview Regional Hospital. Thru the years, he has been volunteering in the community and assisting with many community projects to include ACCESS, Kids Konnection, the Children’s Museum of St. Tammany Parish and donating to local schools. Working with local TV stations, Dr. LeBlanc provided health information to the communities as well as assisting in the establishment of the first concussion program for St. Tammany Parish, which is currently in place.
Christina Lewis, MD, FAAP
Christina Lewis MD, FAAP grew up in Slidell, LA before heading to Mobile, AL to attend Spring Hill College where she earned her degree in Biology. She then returned to New Orleans to attend medical school at Louisiana State University School of Medicine and since has completed her residency training at the combined Tulane-Ochsner Pediatric Residency Program.
During her time in residency, Dr. Lewis has mentored multiple co-residents, interns, and medical students and has served on the Tulane-Ochsner Clinical Learning Environment Committee working to improve the overall resident experience. She has also served as Resident Representative on Ochsner’s Child Health Committee working to ensure optimal patient care. In her work with the Tulane-Ochsner Advocacy Program, she created a database for the Guidelines for Adolescent Preventative Services screening tools, enabling her to characterize the patient population so as to better serve them. Outside of her training, Dr. Lewis has enjoyed establishing her family and she is now the proud “Mama” of three children with her husband, Chester Lewis, Jr.
Professional organization affiliations include the American College of Physicians and the American Academy of Pediatrics.
Kelsey Manguno, MD
Dr. Kelsey Manguno is a board-certified pediatrician and Fellow of the American Academy of Pediatrics. She was a Metairie native until moving with her family to the Northshore in 2003 where she attended Fontainebleau High School, graduating in 2010. Following graduation, she moved to Baton Rouge to study Biological Sciences at Louisiana State University where she graduated in 2014 with a Bachelor of Science as a University Medalist for maintaining a 4.0 GPA throughout her undergraduate education. She then moved to New Orleans to attend LSU School of Medicine. Upon medical school graduation in 2018, Dr. Manguno was the recipient of the Stephen Osofsky Memorial Award from the Department of Pediatrics for outstanding performance during the pediatric acting internship. She completed her residency training at Children’s Hospital of New Orleans with the LSU New Orleans Pediatric Residency Program in 2021.
Dr. Manguno’s husband, Michael, is a high school football coach turned stay-at-home Dad to their two beautiful daughters, June and Hattie. Dr. Manguno enjoys most of all spending time with her family.
Dr. Manguno is elated and grateful to have joined the LeBlanc Pediatrics team serving the community in which she grew up. It has been her dream to return home to the Northshore, and she is excited to care for the children of this area.
Amber Severio, MD, FAAP
Dr. Amber Severio is a board-certified pediatrician and Fellow of American Academy of Pediatrics. She grew up in Baton Rouge and graduated with honors in biology from Southeastern University in 2011. She completed medical school at LSU New Orleans and her residency at Children’s Hospital in New Orleans with the LSU residency program. She practiced as a general pediatrician in Metairie prior to moving to the Northshore with her family.
Throughout residency, Dr. Severio was passionate about the medical residents wellbeing. She was the leader of multiple committees including a residency wellness group and a resident grief group to aid in the debriefing after challenging patient events. Dr. Severio has also been certified with an Adolescent Health Initiative. This program helps to improve the practices, policies, and the environment of the clinic to support adolescent health.
She began at Leblanc pediatrics in 2023 where she enjoys providing comprehensive pediatric care to her surrounding community. She currently lives in Mandeville, LA with her husband and two daughters.
Christina Young, APRN, CPNP
Christina Young, APRN, CPNP, grew up in Clarksville, TN where she attended Austin Peay State University. She earned her Bachelor of Science in Nursing in 2006 before moving with her husband to Louisiana. She practiced for 9 years in Women and Children's units before completing her Master's of Science in Nursing as a Pediatric Nurse Practitioner from the University of South Alabama in 2014. She maintains her certification through the Pediatric Nursing Certification Board.
Professional organization affiliations include the Louisiana Association of Nurse Practitioners, National Assoc. of Pediatric Nurse Practitioners, and the Crohn’s and Colitis Foundation of America.
Jackie Walter, APRN, CPNP
Jackie Walter, APRN, CPNP, grew up in Metairie, Louisiana and earned her Bachelor of Science in Nursing from Louisiana State University Health Sciences Center in 2010. She went on to study Pediatric Primary care at the University of South Alabama and graduated in 2014 with her Master of Science in Nursing Jackie maintains her certification as a Pediatric Nurse Practitioner through the Pediatric Nursing Certification Board. She gained the majority of her pediatric experience at Our Lady of the Lake Children’s Hospital in Baton Rouge, LA, where she practiced as a nurse for 3 years. Jackie lives in Mandeville with her husband, son, and two dogs.
Jackie is a member of the National Association of Pediatric Nurse Practitioners and Sigma Theta Tau, The National Honor Society of Nursing.
Mindy Kass, APRN, CPNP
Mindy D. Kass, APRN, CPNP grew up in Chalmette, Louisiana. She attended Southeastern Louisiana University and received her Bachelor’s degree in nursing in 2006. In 2016, she attained a Master’s degree in the Science of Nursing from the University of South Alabama and became board certified as a Pediatric Nurse Practitioner in Louisiana. She maintains her certification as a Pediatric Nurse Practitioner through the Pediatric Nursing Certification Board. Mindy’s career as a nurse began in the pediatric intensive care unit at Our Lady of the Lake Children’s Hospital in Baton Rouge, LA. She has been caring for pediatric patients ever since. Mindy lives in Madisonville, LA with her husband Ronnie, 2 children and one dog.
Collette Wagner, APRN, FNP-C
Collette Wagner, APRN, FNP-C, grew up in the metropolitan New Orleans area and earned her Bachelor of Science in Nursing from William Carey University in 2011. She went on to study as a Family Nurse Practitioner at Southeastern Louisiana University and graduated in 2020 with her Master of Science in Nursing. Collette maintains her certification as a family nurse practitioner through the American Association of Nurse Practitioners. She has always worked in pediatrics throughout her career. She began her nursing career in the NICU for 4 years and in the pediatric emergency department for 6 years, before obtaining her Master of Science in Nursing. Collette lives in Mandeville with her husband and six children.
Collette is a member of the National Association of the Pediatric Nurse Practitioners.