Chalazion unspecified eye, unspecified eyelid

This code signifies an inflammatory lesion of the meibomian gland, presenting as a firm, painless nodule on the eyelid. It results from obstruction of the gland's duct and subsequent lipid extravasation into the surrounding tissue. This specific code is used when the affected eye and eyelid are not documented.

Apply this code when the patient presents with a chalazion, and the medical record does not specify laterality (right or left eye) or the specific eyelid (upper or lower). Documentation should clearly state "chalazion" without further anatomical detail.

• Avoid using this code if the laterality or specific eyelid is documented; instead, use a more specific code from the H00.1- series.
• Differentiate from hordeolum (stye), which is an acute bacterial infection of an eyelash follicle or meibomian gland, typically painful.
• Ensure the documentation supports the "unspecified" nature; if the physician notes "left upper eyelid chalazion," a more precise code is required.