W99
⚠ Non-billable (Header)Exposure to other man-made environmental factors
External causes of morbidity (V00-Y99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Child Codes (3)
Clinical Description
ICD-10-CM code W99 represents exposure to other man-made environmental factors. This code falls under the External causes of morbidity (V00-Y99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
Frequently Asked Questions
What is ICD-10 code W99?
ICD-10-CM code W99 is "Exposure to other man-made environmental factors". It belongs to the category: External causes of morbidity (V00-Y99).
Is W99 a billable ICD-10 code?
No, W99 is a non-billable header code. A more specific child code must be used for billing.
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)