A: Providers must comply with current provider standards to obtain and/or maintain Medicare billing privileges through the NSC. Supplier standards are published in CFR 42,424.57(c). Quality standards are CMS-accredited accreditation body guidelines that suppliers must meet in order to obtain accreditation. Suppliers are reminded that the NPC is being recalled and that accreditation bodies are fully autonomous. Compliance with one unit does not guarantee compliance with the other unit.