W16.111 Fall into natural body of water striking water surface causing drowning and submersion

ICD-10-CM Code W16.111: Fall into natural body of water striking water surface causing drowning and submersion

ICD-10-CM code W16.111 represents a fall into a natural body of water where the individual strikes the water surface, causing drowning and submersion. The code is distinct from submersion events without a fall. Official sources detail the code structure, including specific encounter extensions and related injury classifications used for tracking falls with major injury. 5 6 3

Plain-language overview

Code W16.111 identifies an incident where a person falls into a natural body of water, strikes the water surface, and experiences drowning and submersion. This classification specifies the exact mechanism of the fall and the resulting drowning event. 5 6

What this code represents

The code W16.111 is listed as a parent concept for the more specific code W16.111D. This structure establishes a hierarchical relationship within the ICD-10-CM system for this specific drowning and fall scenario. 5

Coding details

The category W16.1 encompasses falls into natural bodies of water, such as lakes, open seas, rivers, and streams. Code W16.111 is specifically situated under the subcategory W16.11 for falls striking the water surface. 6

An Excludes1 note for W16.111 indicates that drowning and submersion while in a natural body of water without a fall is coded to W69. This note separates falls into water from submersions without a preceding fall. 6

Documentation considerations

The CMS technical specifications list W16111A as an initial encounter code for a fall into a natural body of water striking the water surface causing drowning and submersion. This formatting variation appears in reports tracking falls with major injury. 3 4

The CMS sources list related codes for falls into natural bodies of water, including W16112A for other injury and W16121A for striking the bottom causing drowning. These codes distinguish the specific point of impact and the resulting injury type. 3 4

What the sources add

The CDC mortality instructions establish that a statement of drowning is sufficient for classification when a transportation event is involved. The CMS technical reports provide a format of the code with an initial encounter character for facility reporting. 1 2 3

The CDC guidelines and the CMS technical reports present different operational contexts for drowning events. The CDC focuses on underlying cause-of-death classification assumptions for transportation accidents, while the CMS lists specific ICD-10-CM codes for tracking major injuries. 1 2 3 4

Questions to verify

The provided sources do not establish the billable status of the base W16.111 code without an encounter character. Verification is needed regarding whether W16.111 alone is valid for standard ICD-10-CM billing or if a seventh character is required. 3 4 6

Sources

1. Instructions for Classifying the Underlying Cause-of-Death, ICD-10, 2025 — cdc.gov; accessed 2026-07-25.
2. Instructions for Classifying Multiple Causes of Death, 2024 – Section V — cdc.gov; accessed 2026-07-25.
3. Long-Term Care Hospital – Falls with Major Injury ... — cms.gov; accessed 2026-07-25.
4. Home Health - Falls with Major Injury Respecification — cms.gov; accessed 2026-07-25.
5. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
6. Coding: ICD-10-CM Section W00-W19 — imedicalcode.com; accessed 2026-07-25.