Perianal venous thrombosis
ICD-10 K64.5 is a billable code used to indicate a diagnosis of perianal venous thrombosis.
Perianal venous thrombosis, commonly referred to as thrombosed external hemorrhoids, is characterized by the formation of a blood clot in the veins surrounding the anal region. Clinically, patients may present with sudden onset of severe pain, swelling, and a palpable lump near the anus. The anatomy involved includes the external hemorrhoidal plexus, which is located beneath the skin around the anal opening. Disease progression can vary; while some patients may experience spontaneous resolution, others may require surgical intervention if symptoms persist or worsen. Diagnostic considerations include a thorough physical examination, where the clinician may observe a bluish, tender mass at the anal verge. Differential diagnoses may include other causes of anal pain such as anal fissures or abscesses. Accurate diagnosis is essential for appropriate management, which may involve conservative measures such as sitz baths and analgesics or more invasive procedures like excision of the thrombosed hemorrhoid.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
K64.5 specifically covers perianal venous thrombosis, which includes thrombosed external hemorrhoids. It does not cover internal hemorrhoids or other anal conditions such as fissures or abscesses.
K64.5 should be used when there is a confirmed diagnosis of perianal venous thrombosis, characterized by a painful, swollen external hemorrhoid. It should not be used for uncomplicated hemorrhoids (K64.0) or other anal disorders.
Documentation should include a detailed history of symptoms, physical examination findings, and any treatments provided. Notes should clearly indicate the diagnosis of perianal venous thrombosis and any relevant imaging if performed.
