H21.55Non-Billable (Header)Recession of chamber angleChild CodesH21.551Recession of chamber angle, right eyeH21.552Recession of chamber angle, left eyeH21.553Recession of chamber angle, bilateralH21.559Recession of chamber angle, unspecified eyeCode Hierarchy└H21Other disorders of iris and ciliary body└H21.5Other and unspecified adhesions and disruptions of iris and ciliary body└H21.55Recession of chamber angle└H21.55Recession of chamber angle