As of October 2015, ICD-9 codes are no longer used for medical coding. Instead, use this equivalent ICD-10-CM code, which is an exact match to ICD-9 code 371.57:
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
371.57 is a legacy non-billable code used to specify a medical diagnosis of endothelial corneal dystrophy. This code was replaced on September 30, 2015 by its ICD-10 equivalent.
References found for the code 371.57 in the Index of Diseases and Injuries:
Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.
General Equivalence Map Definitions The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.