Airway disease due to specific organic dust (J66) ICD-10-CM
The J66 code range covers airway disease due to specific organic dust with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the J66 Range 5 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the J66 range.
Bronchoconstriction
Narrowing of the caliber of the BRONCHI, physiologically or as a result of pharmacological intervention.
Byssinosis
A condition of BRONCHOCONSTRICTION resulting from hypersensitive reaction to inhaled dust during the initial processing of cotton, flax, or hemp in the textile industry. Symptoms include wheezing and tightness in the chest.
About the J66 Code Range
The ICD-10 code J66 group identifies specific airway diseases caused by organic dust exposure. These codes are used to classify respiratory conditions resulting from inhaling various organic dusts in occupational or environmental settings.
This section includes codes for diseases like J66.0 (Byssinosis), also known as "pneumoconiosis caused by organic dust" or "endotoxicosis," typically related to cotton dust exposure. J66.1 covers Flax-dressers' disease, caused by flax dust and sometimes referred to by similar terms including byssinosis. J66.2 (Cannabinosis) denotes lung disease from cannabis dust. Other organic dust-related airway diseases fall under J66.8, which encompasses conditions such as pulmonary mycotoxicosis or illness from sisal dust. These codes help healthcare providers and coders accurately document lung diseases specifically linked to organic dust exposure, facilitating precise diagnosis and appropriate treatment planning.
Questions About This Page
How many billable codes are in the J66 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the J66 range classify?
The range classifies airway disease due to specific organic dust. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
