Lanham-based Doctors Community Hospital ihas been fined by Maryland health regulators after failing to notify them that a patient had died and that at least seven others suffered serious harm last year as a result of mistakes by the medical staff. The 185-bed medical surgical hospital paid the $30,000 fine last month for violating a Maryland law that requires hospitals to report serious medical errors. State officials agreed to reduce a proposed penalty of $95,000 as long as the hospital uses the remaining $65,000 to develop a patient safety program.