ICD-10 W73
Non-Billable HeaderOther specified cause of accidental non-transport drowning and submersion
About ICD-10-CM W73
ICD-10-CM code W73 represents Other specified cause of accidental non-transport drowning and submersion. This is a non-billable header code in the External Causes of Morbidity chapter (block W73). The 2026 edition of ICD-10-CM W73 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under W73. Per CMS ICD-10-CM Tabular 2026.
- Accidental drowning and submersion while in quenching tank
- Accidental drowning and submersion while in reservoir
Type 1 Excludes
Pure excludes, these codes can never be coded together with W73. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- accidental drowning and submersion due to fall into other water (W16.311, W16.321, W16.331)
Coding Notes
Seven Chr Note
- The appropriate 7th character is to be added to code W73
Medicare LCD Coverage for W73
Local Coverage Determinations (LCDs) from CMS MACs that list W73 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing W73.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but W73 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with W73
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To W73
Other codes in section W65-W74 (Accidental non-transport drowning and submersion).
ICD-10 W73, Billing FAQ
Is ICD-10 code W73 billable? +
No, W73 is a non-billable header code. Use a more specific child code from block W73 when submitting claims.
What other names or terms map to W73? +
ICD-10 W73 includes: Accidental drowning and submersion while in quenching tank; Accidental drowning and submersion while in reservoir.
What codes are Type 1 Excludes for W73? +
Type 1 Excludes (never code together with W73): accidental drowning and submersion due to fall into other water (W16.311, W16.321, W16.331)
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team