ICD-10-CM · Chapter 1 · A00–B99
B01
Varicella [chickenpox]
Certain infectious and parasitic diseases
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- B01
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 1 — Certain infectious and parasitic diseases
- Category
- B01
- Specificity
- 3 characters
How coders use this code
ICD-10-CM B01 is a category (header) for varicella [chickenpox]. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in B01
- B01.0Varicella meningitis
- B01.1Varicella encephalitis, myelitis and encephalomyelitis
- B01.11Varicella encephalitis and encephalomyelitis
- B01.12Varicella myelitis
- B01.2Varicella pneumonia
- B01.8Varicella with other complications
- B01.81Varicella keratitis
- B01.89Other varicella complications
- B01.9Varicella without complication
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