The codes in subcategory H18.5, Hereditary corneal dystrophies, have been expanded to identify laterality (i.e., right eye, left eye, bilateral and unspecified eye). This change results in 28 new codes. While the dystrophies are generally thought to be bilateral conditions, they may be asymmetric and may not require the same interventions. The ability to report laterality is important for tracking outcomes.
Corneal dystrophy is a group of rare genetic eye conditions in which one or more parts of the cornea lose their normal clarity due to abnormal deposition of substances.
AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2020 Issue 4; New/Revised ICD-10-CM Codes
Hereditary Corneal Dystrophy
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