ICD-10 Code for Pinworms
The ICD-10 code for pinworm infection (enterobiasis) caused by Enterobius vermicularis is B80.
Clinical Context
Pinworm infection, also known as enterobiasis or threadworm infection, is caused by Enterobius vermicularis and represents one of the most common helminthic infections worldwide, particularly affecting children aged 5-14 years 1.
Key Clinical Features for Documentation
When coding B80, the following clinical presentations support the diagnosis:
- Pruritus ani (intense nocturnal perianal itching) - the most common presenting symptom 1
- Gastrointestinal symptoms including diarrhea, abdominal pain, and weight loss 1
- Vaginal discharge in females due to genital tract colonization 1
- Behavioral changes such as irritability and sleep disturbance 1, 2
Diagnostic Confirmation
The diagnosis should be established by:
- Cellophane tape test (sellotape test) - the gold standard diagnostic method performed by placing adhesive tape on perianal skin and examining microscopically for ova 1, 3
- Direct visualization of adult worms in the perianal area 2
Note that stool microscopy is not recommended as pinworms and eggs are not usually passed in stool 2.
Treatment Documentation
Standard treatment regimens that support the B80 diagnosis include:
- Albendazole 400 mg as a single oral dose, repeated in 2 weeks 1, 3
- Mebendazole 100 mg as a single oral dose, repeated in 2 weeks 1, 3
Both medications are adulticidal and ovicidal 2.