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  2. ICD-10-CM Codes List
  3. A00–B99
  4. B00-B09
  5. Varicella [chickenpox] (B01)

Varicella [chickenpox] (B01)

The ICD-10 code B01 represents varicella, commonly known as chickenpox, including its various complications. These codes help healthcare providers document and classify the infection precisely, from uncomplicated cases to serious complications affecting the brain, lungs, eyes, and other organs.

Specifically, B01 covers all types of varicella infections. For example, B01.0 is used for varicella meningitis, a viral infection of the brain's lining, while B01.1 classifies varicella encephalitis and myelitis; serious inflammations of the brain and spinal cord. Within this, B01.11 addresses post-infectious encephalitis, also called postvaricella encephalitis. Respiratory complications are coded as B01.2, known as chickenpox pneumonia or hemorrhagic varicella pneumonia. Eye involvement like keratitis is documented with B01.81. Other less common or neurological complications are grouped under B01.89, which includes issues like viral dermatitis of the eyelid and acute cerebellar ataxia caused by varicella. When no complications are present, B01.9 is the appropriate ICD-10 code for varicella.

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Anetoderma

Benign DERMATOSIS caused by a loss of dermal ELASTIC TISSUE resulting in localized sac-like areas of flaccid skin. It can be either primary (idiopathic) or secondary to other skin conditions, PENICILLAMINE use, or premature birth.

Varicella Zoster Virus Infection

Infection caused by HUMAN HERPES VIRUS 3 (e.g., CHICKENPOX and HERPES ZOSTER).