New pediatric nurse practitioner joins OSF Medical Group in Godfrey

12/01/2025 - Alton, Illinois

  • head shot

    Marissa St. Peters

OSF Medical Group – Pediatrics (Godfrey) is pleased to announce a new board-certified pediatric nurse practitioner has been added to its staff to better serve the increasing pediatric care needs in the Riverbend region.

Marissa St. Peters, APRN, PNP-BC, is accepting new patients at OSF Medical Group – Pediatrics, located at 6702 Godfrey Road, in Godfrey. Ms. St. Peters will see patients Monday - Friday, 7 a.m. - 3 p.m.

Ms. St. Peters is a board-certified pediatric nurse practitioner (Pediatric Nursing Certification Board, 2023), and has accumulated more than seven-and-a-half years of pediatrics nursing experience that encompasses:

  • Serving as an emergency room nurse at Mercy Hospital-St. Louis and St. Louis Children’s Hospital
  • Employed as an emergency room “Travel Nurse” for children’s hospitals in Arizona, California, Colorado and Missouri

Marissa was drawn to OSF HealthCare for its reputation for fostering innovation in care and its Mission-driven, supportive culture. “I’m happy to be part of a collaborative team where I can provide compassionate, high-quality care while continuing to grow as a provider,” she says. “My approach to each appointment is relaxed, thorough and patient centered. I take time to listen, answer questions and ensure families feel heard and supported.”

Her passion for medicine began at a young age, inspired by a desire to care for others and make a meaningful difference in their lives. “Choosing pediatrics was a natural fit, I enjoy connecting with children, guiding their growth and celebrating milestones with families,” Marissa says.

St. Peters’ education began by receiving a Bachelor of Arts in Psychology and Sociology from the University of Mississippi (Oxford), followed by obtaining a Bachelor of Science in Nursing from the Goldfarb School of Nursing at Barnes-Jewish College (St. Louis, MO) and then a Master of Science in Nursing from Maryville University (St. Louis, MO).

St. Peters is accepting new patients – appointments can be made by calling (618) 467-1520.

Marissa’s OSF Medical Group online biography can be viewed by visiting www.osfhealthcare.org/providers/marissa-st.%20peters-5912208 where individuals can also schedule appointments with her by utilizing an online schedule platform.

The addition of St. Peters to OSF Medical Group – Pediatrics (Godfrey) expands the pediatrics provider roster to 3 – that also includes:

  • Board-certified pediatrician Ameera F. Nauman, MD
  • Board-certified pediatric nurse practitioner Lori P. Balchik, APRN

“The Riverbend region is experiencing an increasing need for access to pediatric primary care services,” says Amber Blackorby, practice manager, OSF Medical Group in Godfrey. “We’re very excited to add Marissa to our provider roster as she’s a perfect fit to enhance our Mission of ‘serving with the greatest care and love.”

FOR MORE INFORMATION, CONTACT:

Randy Schorfheide
Public Relations & Communications Coordinator
(618) 474-6766
randy.t.schorfheide@osfhealthcare.org