Y21.4XXD ICD-10-CM Code: Drowning and submersion in natural water, undetermined intent, subsequent encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Change history
No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.
Verify Before Coding
- Principal-diagnosis restriction. External cause of morbidity codes (V, W, X and Y) describe the circumstance that caused an injury, not the condition treated. The Medicare Code Editor rejects them as a principal diagnosis; sequence the injury or condition first and report this code as secondary.
From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.
Contextual Map
Every relationship of Y21.4XXD in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Hierarchy
- V00-Y99 — Chapter 20: External Causes of Morbidity (V00-Y99) (V00-Y99) [Hierarchy]
- Y21-Y33 — Event of undetermined intent [Hierarchy]
Clinical classification (CCSR)
- EXT029 — External cause codes: subsequent encounter [CCSR]
Nearest codes (28)
- Y21 — Drowning and submersion, undetermined intent [Sibling]
- Y21.0 — Drowning and submersion while in bathtub, undetermined intent [Sibling]
- Y21.0XXA — Drowning and submersion while in bathtub, undetermined intent, initial encounter [Sibling]
- Y21.0XXD — Drowning and submersion while in bathtub, undetermined intent, subsequent encounter [Sibling]
- Y21.0XXS — Drowning and submersion while in bathtub, undetermined intent, sequela [Sibling]
- Y21.1 — Drowning and submersion after fall into bathtub, undetermined intent [Sibling]
- Y21.1XXA — Drowning and submersion after fall into bathtub, undetermined intent, initial encounter [Sibling]
- Y21.1XXD — Drowning and submersion after fall into bathtub, undetermined intent, subsequent encounter [Sibling]
- and 20 more
Relationships & Classification
Clinical classification (AHRQ CCSR):EXT029 — External cause codes: subsequent encounter.
Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.
Frequently Asked Questions (FAQ) & Clinical Guidance
Does Y21.4XXD require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category Y21.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to Y21.4XXD in its code family, with their registry titles.
- Y21.3XXA — Drowning and submersion after fall into swimming pool, undetermined intent, initial encounter
- Y21.3XXD — Drowning and submersion after fall into swimming pool, undetermined intent, subsequent encounter
- Y21.3XXS — Drowning and submersion after fall into swimming pool, undetermined intent, sequela
- Y21.4 — Drowning and submersion in natural water, undetermined intent
- Y21.4XXA — Drowning and submersion in natural water, undetermined intent, initial encounter
- Y21.4XXS — Drowning and submersion in natural water, undetermined intent, sequela
- Y21.8 — Other drowning and submersion, undetermined intent
- Y21.8XXA — Other drowning and submersion, undetermined intent, initial encounter
- Y21.8XXD — Other drowning and submersion, undetermined intent, subsequent encounter
- Y21.8XXS — Other drowning and submersion, undetermined intent, sequela