Miliaria crystallina

This code represents a superficial form of heat rash characterized by tiny, clear, fluid-filled vesicles (blisters) that resemble dewdrops on the skin. It occurs when sweat ducts in the outermost layer of the epidermis are obstructed, typically due to excessive sweating in hot, humid conditions.

Use this code for patients presenting with asymptomatic, non-inflammatory, clear vesicles on the skin, often following fever or exposure to high temperatures. Documentation should clearly describe the characteristic "dewdrop-like" appearance of the lesions and their superficial nature.

• Differentiate from other forms of miliaria (e.g., rubra, profunda) based on lesion morphology and depth of obstruction.
• Ensure documentation specifies the crystallina type; otherwise, a more general miliaria code might be appropriate.
• Consider any underlying conditions contributing to excessive sweating, such as fever, and sequence accordingly.