Army surgeon.

Studied medicine with Thomas Bond of Philadelphia. Surgeon, second battalion of Miles’s Pennsylvania Rifle Regiment (March- December 1776). Traveled to Heidelberg to secure an inheritance and study medicine (1778); carried letters of recommendation from Richard Bache and Thomas Bond Jr., and attempted to visit Franklin in Paris. Fought a duel with Stephen Chambers, a Lancaster attorney who had said Rieger was shabbily dressed, and mortally wounded him (May 1789).

Son of Dr. John Frederich and Jane Rieger of Philadelphia. Name also spelled “Riegner” and “Rigger.”