264.0
ICD-9-CMThis code signifies a nutritional deficiency of Vitamin A that has progressed to affect the eyes, specifically causing dryness and thickening of the conjunctiva. This ocular manifestation is an early sign of xerophthalmia, a spectrum of eye disease due to severe Vitamin A deficiency.
Assign this code when documentation explicitly states Vitamin A deficiency accompanied by conjunctival xerosis. Supporting documentation would include physician notes detailing clinical signs of xerosis, such as Bitot's spots or conjunctival dryness, in the context of a confirmed or suspected Vitamin A deficiency.
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