Pterygium NOS 37241 Periph station pterygium 37242 Periph progess pterygium 37243 Central pterygium 37244 Double pterygium 37245 Recurrent pterygium 37250 Conjunctival degen NOS 37251 Pinguecula 37252 Pseudopterygium 37253 Conjunctival xerosis 37254 Conjunctival concretions 37255 Conjunctiva pigmentation 37256 ...