Insurance giant Aetna’s lawsuit against a medical group over allegations that it inflated bills for neonatal care can proceed, a federal judge has ruled.

U.S. District Judge Wendy Beetlestone of the Eastern District of Pennsylvania denied defendant Mednax’s motion to dismiss Aetna’s claims. Beetlestone held that Aetna’s claims were not barred by the statute of limitations and presented issues of fact to be determined by a jury.