B85.3
Phthiriasis
Clinical Classification Guidelines
Inclusion Terms
- Infestation by crab-louse
- Infestation by Phthirus pubis
Medical Intelligence & Overview
Phthiriasis, also known as crab lice infestation, is a parasitic condition caused by the infestation of the Phthirus pubis lice. Commonly referred to as pubic lice, this condition affects the area around the pubic hair but can also be found in other coarse hair regions such as the underarms, eyebrows, or chest. The infestation is transmitted mainly through sexual contact but can also spread via infested clothing, bedding, or towels. Recognizing the symptoms and understanding the causes can aid in early management and preventing transmission.
Causes & Symptoms
Clinical Causes: Direct sexual contact with an infested person Sharing infested clothing, bedding, towels, or other personal items Contact with contaminated surfaces such as seats or furniture
Key Symptoms: Itching in the affected areas, often intense and worsened at night Presence of small lice or nits (lice eggs) attached to hair shafts Skin irritation or redness due to scratching Possible visible lice in pubic hair or other areas Secondary skin infections from scratching
Diagnostic & Treatment
Diagnosis Path: Diagnosis involves visual inspection of the affected areas to identify lice or nits. Healthcare providers may examine multiple regions, especially in cases where infestation spreads beyond the pubic area. Microscopic identification of lice or eggs can confirm the diagnosis. Sometimes, skin scrapings are examined under a microscope for definitive identification of the parasite.
Treatment Protocols: Management of phthiriasis typically involves the use of prescribed topical insecticidal treatments such as permethrin cream or lotion applied directly to the affected areas. In addition, thorough cleaning of clothing, bedding, and towels in hot water and vacuuming furniture can help eliminate parasites from the environment. It is important to avoid close contact with others until treatment is completed. Partners and household members should be checked and treated if necessary to prevent recurrent infestation.
Clinical Advice & FAQs
Billing Guidance
Is B85.3 a billable ICD-10 code?
Yes, B85.3 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report B85.3?
Clinical documentation must specify the nature of Phthiriasis and any associated comorbidities for accurate reporting.
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