House committee substitute makes the following changes to 1st edition. Amends proposed GS 58-3-231(b) to remove the requirement that a locum tenens physician be credentialed by the insurer prior to substituting for a regular physician before an insurer allows a patient’s regular physician to submit a claim and receive payment for covered visit services that a regular physician or a locum tenens agency arranges to be provided by a locum tenens physician. Makes other clarifying and technical changes.