Non-Billable / Non-Specific Code
ICD-10-CM W16.21 is the diagnosis code for Fall in (into) filled bathtub. 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.
The following conditions should never be coded at the same time as W16.21. They are mutually exclusive:
Understanding where W16.21 sits in the ICD-10-CM classification helps ensure proper coding:
No, W16.21 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
W16.21 is the ICD-10-CM diagnosis code for "Fall in (into) filled bathtub". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of W16.21 is W16.2 ("Fall in (into) filled bathtub or bucket of water"). W16.21 provides a more specific classification within this category.
W16.21 is located in Section W00-W19 — "Slipping, tripping, stumbling and falls" within Chapter 20 of the ICD-10-CM Tabular List.
W16.21 has 2 sub-code(s) that provide more specific detail: W16.211, W16.212.
Use W16.21 when the patients documented diagnosis matches "Fall in (into) filled bathtub" 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 in (into) filled bathtub is W16.21.
No, W16.21 is non-billable. Use a more specific sub-code for primary diagnosis billing.
W16.21 is in Chapter 20 of the ICD-10-CM Tabular List.
Type 1 Excludes for W16.21 include: fall into empty bathtub (W18.2).
Yes, W16.21 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.