ICD-10-CM B01 is the diagnosis code for Varicella [chickenpox]. This code falls under the section "Viral infections characterized by skin and mucous membrane lesions" within Chapter 1 — Certain infectious and parasitic diseases (A00-B99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where B01 sits in the ICD-10-CM classification helps ensure proper coding:
No, B01 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
B01 is the ICD-10-CM diagnosis code for "Varicella [chickenpox]". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
B01 is located in Section B00-B09 — "Viral infections characterized by skin and mucous membrane lesions" within Chapter 1 of the ICD-10-CM Tabular List.
B01 has 5 sub-code(s) that provide more specific detail: B01.0, B01.1, B01.2, B01.8, B01.9.
Use B01 when the patients documented diagnosis matches "Varicella [chickenpox]" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Varicella [chickenpox] is B01.
No, B01 is non-billable. Use a more specific sub-code for primary diagnosis billing.
B01 is in Chapter 1 of the ICD-10-CM Tabular List.
Yes, B01 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.