Non-Billable / Non-Specific Code
ICD-10-CM W16.4 is the diagnosis code for Fall into unspecified water. This code falls under the section "Slipping, tripping, stumbling and falls" 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.
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 W16.4 sits in the ICD-10-CM classification helps ensure proper coding:
No, W16.4 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
W16.4 is the ICD-10-CM diagnosis code for "Fall into unspecified water". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of W16.4 is W16 ("Fall, jump or diving into water"). W16.4 provides a more specific classification within this category.
W16.4 is located in Section W00-W19 — "Slipping, tripping, stumbling and falls" within Chapter 20 of the ICD-10-CM Tabular List.
W16.4 has 1918 sub-code(s) that provide more specific detail: A00, A01, A02, A03, A04 and more.
Use W16.4 when the patients documented diagnosis matches "Fall into unspecified water" 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 Fall into unspecified water is W16.4.
No, W16.4 is non-billable. Use a more specific sub-code for primary diagnosis billing.
W16.4 is in Chapter 20 of the ICD-10-CM Tabular List.
Yes, W16.4 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.