​Maryland’s credentialing law is in § 15-112​ of the Insurance Article. The statute deals with multiple aspects of how carriers contract with providers for participation on a provider panel.  “Within 30 days of receiving an application, a carrier must send notice of the carrier’s intent to continue to process the application or a rejection of the application. If a carrier proceeds with processing the application, the carrier has 120 days after the date of the notice to accept or reject the provider for participation and send notice of the decision. If an application is incomplete, the carrier must return the application within 10 days.