Non-Billable / Non-Specific Code
ICD-10-CM W31 is the diagnosis code for Contact with other and unspecified machinery. This code falls under the section "Exposure to inanimate mechanical forces" 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 W31. They are mutually exclusive:
Understanding where W31 sits in the ICD-10-CM classification helps ensure proper coding:
No, W31 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
W31 is the ICD-10-CM diagnosis code for "Contact with other and unspecified machinery". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
W31 is located in Section W20-W49 — "Exposure to inanimate mechanical forces" within Chapter 20 of the ICD-10-CM Tabular List.
W31 has 6 sub-code(s) that provide more specific detail: W31.0, W31.1, W31.2, W31.3, W31.8 and more.
Use W31 when the patients documented diagnosis matches "Contact with other and unspecified machinery" 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 Contact with other and unspecified machinery is W31.
No, W31 is non-billable. Use a more specific sub-code for primary diagnosis billing.
W31 is in Chapter 20 of the ICD-10-CM Tabular List.
Type 1 Excludes for W31 include: contact with agricultural machinery (W30.-); contact with machinery in transport under own power or being towed by a vehicle (V01-V99); exposure to electric current (W86).
Yes, W31 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.