ICD-10 J66
Non-Billable HeaderAirway disease due to specific organic dust
About ICD-10-CM J66
ICD-10-CM code J66 represents Airway disease due to specific organic dust. This is a non-billable header code in the Respiratory System chapter (block J66). The 2026 edition of ICD-10-CM J66 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.
Type 2 Excludes
Not included here, the excluded code is not part of J66, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- allergic alveolitis (J67.-)
- asbestosis (J61)
- bagassosis (J67.1)
- farmer's lung (J67.0)
- hypersensitivity pneumonitis due to organic dust (J67.-)
- reactive airways dysfunction syndrome (J68.3)
Medicare LCD Coverage for J66
Local Coverage Determinations (LCDs) from CMS MACs that list J66 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 J66.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but J66 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with J66
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 J66
Other codes in section J60-J70 (Lung diseases due to external agents).
ICD-10 J66, Billing FAQ
Is ICD-10 code J66 billable? +
No, J66 is a non-billable header code. Use a more specific child code from block J66 when submitting claims.
What codes are Type 2 Excludes for J66? +
Type 2 Excludes (may be coded together when both conditions exist): allergic alveolitis (J67.-); asbestosis (J61); bagassosis (J67.1)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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