Phthirus pubis [pubic louse]

This code represents an infestation of the human body by the pubic louse, Phthirus pubis, commonly known as crab lice. This parasitic condition primarily affects the pubic hair region but can also be found in other coarse body hair such as armpits, eyelashes, and facial hair. The infestation causes intense itching and can lead to secondary skin infections due to scratching.

Use this code when documentation confirms a diagnosis of pubic lice infestation. This typically involves visual identification of adult lice, nits (eggs), or nymphs on the affected body hair. Clinical notes describing symptoms such as pruritus in the pubic area, excoriations, or maculae ceruleae (sky-blue spots) in conjunction with confirmed presence of the parasite support its use.

• Differentiate from other parasitic infestations; this code is specific to Phthirus pubis.
• Consider adding codes for secondary conditions, such as dermatitis or impetigo, if documented as a result of the infestation.
• Ensure the documentation clearly states the type of louse to avoid confusion with head lice (pediculosis capitis) or body lice (pediculosis corporis).