Non-Billable / Non-Specific Code
ICD-10-CM W88 is the diagnosis code for Exposure to ionizing radiation. This code falls under the section "Exposure to electric current, radiation and extreme ambient air temperature and pressure" within Chapter 20 — External causes of morbidity (V00-Y99). 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.
The following conditions should never be coded at the same time as W88. They are mutually exclusive:
Understanding where W88 sits in the ICD-10-CM classification helps ensure proper coding:
No, W88 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
W88 is the ICD-10-CM diagnosis code for "Exposure to ionizing radiation". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
W88 is located in Section W85-W99 — "Exposure to electric current, radiation and extreme ambient air temperature and pressure" within Chapter 20 of the ICD-10-CM Tabular List.
W88 has 3 sub-code(s) that provide more specific detail: W88.0, W88.1, W88.8.
Use W88 when the patients documented diagnosis matches "Exposure to ionizing radiation" 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 Exposure to ionizing radiation is W88.
No, W88 is non-billable. Use a more specific sub-code for primary diagnosis billing.
W88 is in Chapter 20 of the ICD-10-CM Tabular List.
Type 1 Excludes for W88 include: exposure to sunlight (X32).
Yes, W88 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.