Notice. Within 5 days after receipt of an order of the Commission on a claim for payment for medical services, the claimant shall serve a copy of the order on the provider of the medical services for which payment was granted or denied. Penalty for Late Payment for Treatment or Services. The Commission may assess against an employer or insurer a fine not to exceed 20 percent of any fee approved but not timely paid pursuant to Labor and Employment Article, §9-664, Annotated Code of Maryland. The Commission shall determine the amount of the fine on a case-by-case basis.