Insurer to file copy of injury report with department--Notice of denial of coverage by insurer or employer--Suspension, revocation, or refusal of authority for noncompliance

The insurer shall file a copy of the report required by § 62-6-2 with the Department of Labor and Regulation within ten days after receipt thereof. The insurer or, if the employer is self-insured, the employer, shall make an investigation of the claim and shall notify the injured employee and the department, in writing, within twenty days from its receipt of the report, if it denies coverage in whole or in part. This period may be extended not to exceed a total of thirty additional days by the department upon a proper showing that there is insufficient time to investigate the conditions surrounding the happening of the accident or the circumstances of coverage. If the insurer or self-insurer denies coverage in whole or in part, it shall state the reasons therefor and notify the claimant of the right to a hearing under §