Indiana Code Title 16. Health § 16-37-3-7

Sec. 7. (a) If the circumstances suggest that the death was caused by other than natural causes or a person dies or is declared dead in an emergency department and the emergency physician, who is the physician last in attendance, is uncertain as to the cause and manner of death, the following individual shall refer the case to the coroner for investigation:

(b) The coroner shall report a death coming under the coroner's supervision upon official death certificate blanks to the health officer having jurisdiction not more than three (3) days after the inquest is held.  Another person may not report the death.