Dr. Jeffrey Mantia, M.D., FAAP - board certified pediatrician

A native of St. Louis, Missouri, and longtime Kalamazoo resident, Dr. Mantia received his undergraduate degree from Kalamazoo College and his medical degree from Michigan State University.  He completed his pediatric residency training at DeVos Children's Hospital in Grand Rapids.  After working in hospital owned offices in Knoxville, Tennessee and southeast Grand Rapids, Dr. Mantia founded Grandville Pediatrics in 2001. 

While he enjoys all aspects of pediatric care, he has particular interests in sports medicine, nutrition, education, vaccine advocacy and international adoption.  He is married and has 2 sons.  His outside interests include travel, guitar, bicycling, watching movies and attending musical performances and sporting events.


Abigail Lamar MSN, RN, CPNP – Board Certified Pediatric Nurse Practitioner

Abigail ("Abi") started in our office on June 1st.  She has lived in Holland, Michigan her whole life. She attended Grand Valley State University for both her BSN and MSN. She worked for 4 years as an RN at Helen DeVos Children’s Hospital, including 1 year with the Pediatric Nephrology team. She has been working as a Pediatric Nurse Practitioner since 2008 and originally worked for a primary care pediatric group in Holland as well as for the Pediatric Hospitalist group in Holland. Most recently, Abi spent 5 years working in the Pediatric Emergency Department at Helen DeVos Children’s Hospital before joining Grandville Pediatrics in 2017.   Abi is married and has 3 daughters, including a set of identical twins. In addition to spending time with her family Abi enjoys spending time outdoors, boating, fitness, sports, traveling and gardening. Abi looks forward to meeting with you and talking about your child’s healthcare needs.


Emily Rusticus, MSN, RN, CFNP – Board Certified Family Nurse Practitioner

She will start in our office on August 1st. Emily is so excited to be in the pediatric setting again! She received her nursing degree from Trinity College in Palos Heights, IL and lived in downtown Chicago for 2 years while working at Children's Memorial Hospital. She moved back to Grand Rapids with her husband and started working at Helen DeVos Children's Hospital. She then went back to school, completing her FNP degree in 2015. Her first job after graduating was through Mercy Health in Grand Rapids at one of their Family Practice locations. She missed being surrounded by her passion every day and is thrilled to be a part of the Grandville Pediatrics team! Growing up as an athlete, Emily is particularly interested in pediatric sports medicine, but also enjoys nutrition and weight management, female adolescent concerns, and infant care. She lives in Grand Rapids with her husband, daughter and Border Collie/Australian Shepherd mix. She enjoys anything sports related (Go Green!), hiking, running and Netflix.


Jenna Sargent, MSN, RN, CPNP – Board Certified Pediatric Nurse Practitioner

Jenna started in our office on May 22nd. She was born and raised in Grand Rapids and received her undergraduate degree in nursing from the University of Michigan. She worked as a registered nurse in the neonatal ICU at Helen DeVos Children’s Hospital for 1 ½ years and then transferred to the Pediatric Perioperative Unit and worked there for 3 ½ years. She received her master’s in nursing and completed the Pediatric Nurse Practitioner program at Wayne State University. In her spare time, she loves spending time with her family and her Maltese-Yorkie dog. She is a big Michigan fan and enjoys going to U of M football games in the fall. She also enjoys running, being outdoors, reading, and traveling.

View map and directions to our location and office hours.

Grandville Pediatrics
2845 44th
St. SW, Ste. 200
Grandville, MI 49418

(616) 538-2410

fax: (616)538-1557


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