Chloasma of right lower eyelid and periocular area

This code describes the presence of chloasma, a form of hyperpigmentation characterized by brown or grayish-brown patches, specifically located on the right lower eyelid and the surrounding periocular region. This condition is often associated with hormonal changes, sun exposure, or certain medications.

Use this code when documentation clearly indicates chloasma affecting the right lower eyelid and the adjacent periocular area. This diagnosis is typically made through visual inspection during a dermatological or ophthalmological examination. Supporting documentation should specify the location and nature of the hyperpigmentation.

• Ensure the documentation specifies "right lower eyelid and periocular area" to accurately assign this laterality and location.
• Distinguish chloasma from other forms of hyperpigmentation, such as post-inflammatory hyperpigmentation or nevus, based on clinical description.
• Consider additional codes for underlying causes if documented, such as pregnancy (O90.9) or medication-induced pigmentation (L81.3).