ICD-10 Y99.2
Billable / SpecificVolunteer activity
About ICD-10-CM Y99.2
ICD-10-CM code Y99.2 represents Volunteer activity. This is a billable/specific code in the External Causes of Morbidity chapter (block Y99). The 2026 edition of ICD-10-CM Y99.2 became effective on October 1, 2025.
Type 1 Excludes
Pure excludes, these codes can never be coded together with Y99.2. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- activity of child or other family member assisting in compensated work of other family member (Y99.8)
Medicare LCD Coverage for Y99.2
Local Coverage Determinations (LCDs) from CMS MACs that list Y99.2 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 Y99.2.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Y99.2 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Y99.2
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.
Convert Y99.2 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| Y99.2 | E0002 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Y99.2
Other codes in section Y90-Y99 (Supplementary factors related to causes of morbidity classified elsewhere).
ICD-10 Y99.2, Billing FAQ
Is ICD-10 code Y99.2 billable? +
Yes, Y99.2 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for Y99.2? +
Type 1 Excludes (never code together with Y99.2): activity of child or other family member assisting in compensated work of other family member (Y99.8)
What ICD-9 codes does Y99.2 map to? +
Per CMS GEMs, Y99.2 maps to ICD-9 codes: E0002. Useful for legacy data review and historical claim analysis.
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 May 31, 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