2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Disorders Of The Eye And Adnexa 360-379 > Disorders Of Conjunctiva 372.* > 2006 ICD-9-CM Diagnosis 372.40 Pterygium unspecified View the most recent version of ICD-9-CM 372.40 A triangular patch of hypertrophied bulbar subconjunctival tissue, extending from the inner canthus to the border of the cornea or beyond, with apex pointing toward the pupil. An abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea, being immovably united to the cornea at its apex, firmly attached to the sclera throughout its middle portion, and merged with the conjunctiva at its base. 372.40 is a specific code that can be used to specify a diagnosis 372.40 contains 1 index entry View the ICD-9-CM Volume 1 372.* hierarchy  Index entries containing 372.40: Pterygium (eye) 372.40 central 372.43 colli 744.5 double 372.44 peripheral (stationary) 372.41 progressive 372.42 recurrent 372.45