Regular well-child visits are essential for monitoring a child’s growth, development, and overall health. These visits allow pediatricians to assess physical milestones, provide preventive care, and address any concerns from parents.
CPT code 99391 is specifically used for established pediatric patients under the age of one, covering routine checkups, screenings, and anticipatory guidance to support a child’s healthy development.
What Is CPT Code 99391?
CPT code 99391 is used for a preventive well-child visit for an established patient under one year old. This well-child visit includes a detailed health history, a physical examination, and developmental assessments.
Pediatricians also offer counseling on nutrition, safety, and age-appropriate milestones while administering necessary immunizations. By using this code, providers ensure proper documentation and reimbursement for delivering preventive pediatric care that supports early detection of potential health concerns.
Why is CPT Code 99391 Important?
Routine well-child visits play a crucial role in monitoring a child’s growth, development, and overall health. These visits allow pediatricians to track milestones, address parental concerns, and provide necessary immunizations to prevent serious illnesses. Preventive care during early childhood helps detect and manage potential health issues before they become severe.
The CDC reports that routine childhood immunizations prevent an estimated 4 million deaths worldwide each year, demonstrating the critical role of well-child visits in vaccination coverage. These visits ensure children receive essential vaccines on time, protecting them from diseases like measles, polio, and whooping cough.

Clinical Applications of CPT Code 99391
CPT code 99391 is commonly used in pediatric healthcare settings, ensuring infants receive thorough preventive evaluations. Pediatricians use this code for:
- Growth and development monitoring – Tracking weight, height, and head circumference to ensure the child is growing within normal parameters.
- Immunization updates – Administering routine vaccines according to CDC and AAP recommendations.
- Parental guidance and education – Discussing sleep habits, feeding recommendations, and safety measures to support early development.
- Early screening for health conditions – Checking for congenital issues, anemia, lead exposure, and other potential concerns that require timely intervention.
Early intervention through well-child visits improves long-term health outcomes, reducing hospitalizations and supporting early childhood wellness.
Billing Best Practices for CPT Code 99391
Accurate documentation is essential for proper billing and reimbursement of preventive pediatric care services. To maximize claim approval, providers should:
- Ensure age-appropriate ICD-10 codes accompany CPT 99391, such as:
- Document all preventive care components provided during the visit, including screenings, immunizations, and counseling.
- Verify insurance coverage and frequency limitations, as some plans may have restrictions on how often wellness visits are covered.
By following these best practices, pediatricians can streamline billing processes, reduce denials, and ensure continuous care for young patients.
Conclusion
CPT code 99391 is essential for pediatric preventive care, allowing healthcare providers to monitor infant health, administer immunizations, and guide parents on early childhood development. Accurate documentation and coding are crucial to securing proper reimbursement and maintaining compliance.
As a trusted pediatric billing company, we specialize in optimizing revenue cycle management for pediatric practices. Our expert billing services reduce claim denials, ensure coding accuracy, and streamline reimbursements, allowing providers to focus on delivering high-quality care to their youngest patients.