16 Pa. Stat. § 4238
The coroner shall regard any death as sudden if it occurs without prior medical attendance by a person who may lawfully execute a certificate of death in this Commonwealth, or if, within twenty-four hours of death, the decedent was discharged from such medical attendance or a change of such medical attendance had occurred, or if any such medical attendance began within twenty-four hours of death and the medical attendant refuses or is unable to certify the cause of death. Medical attendance includes hospitalization.
The provisions of this section shall not be construed to affect the coroner's discretion as to whether or not any death was suspicious, nor shall they be construed to authorize a coroner to investigate a sudden death any further than necessary to determine the cause and manner of death.
16 P.S. § 4238