ICD-10-CM J66 Coding & Reimbursement Guide

ICD-10-CM Code For Airway Disease Due To Specific Organic Dust: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group J66 includes airway diseases caused by exposure to specific organic dusts, such as hypersensitivity reactions and chronic inflammatory conditions of the bronchi related to organic particulate inhalation. These ICD-10-CM diagnosis codes are used to document exposure-related respiratory conditions, capturing disease severity, organ involvement, and clinical complexity relevant to inhalation-induced airway disease. Accurate coding within the ICD-10-CM J66 group supports appropriate reimbursement, complete clinical documentation, and proper claim adjudication.

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ICD-10-CM J66: Airway Disease Due To Specific Organic Dust Overview

The diagnoses in this group represent airway disorders caused by inhalation of specific organic dusts, affecting the respiratory system primarily through the bronchi and lungs. These conditions include hypersensitivity and chronic airway inflammation attributed to identifiable organic particulate exposures. Accurate coding is important to reflect exposure-related causation and to support appropriate claim processing and documentation for occupational and environmental etiologies.

When to Use

Use a code from this group when a clinician documents an airway disease as being due to a specific organic dust exposure or when clinical findings and history clearly link respiratory symptoms to such exposure. Apply these codes to capture exposure-related causation for clinical records, occupational health documentation, and claims involving environmental or workplace exposures.

ICD-10-CM Code	Description
J66.0	Byssinosis
J66.1	Flax-dressers' disease
J66.2	Cannabinosis
J66.8	Airway disease due to other specific organic dusts

ICD-10-CM Code

Description

J66.0

Byssinosis

J66.1

Flax-dressers' disease

J66.2

Cannabinosis

J66.8

Airway disease due to other specific organic dusts

DRG Code	Description
196	Interstitial Lung Disease with MCC
197	Interstitial Lung Disease with CC
198	Interstitial Lung Disease without CC/MCC

DRG Code

Description

196

Interstitial Lung Disease with MCC

197

Interstitial Lung Disease with CC

198

Interstitial Lung Disease without CC/MCC

Typical Clinical Scenarios

A 45-year-old farmer presents with progressive cough, wheeze, and exertional dyspnea over several months after repeated exposure to moldy hay and grain dust on the farm. Pulmonary function tests show an obstructive pattern with variability and the exposure history implicates organic agricultural dust as the etiologic agent, so a lung disease due to specific organic dust is assigned to capture the occupational/environmental cause of the airway disease. Typical codes: J66.0, J66.1
A 28-year-old worker in a mushroom-processing plant arrives at urgent care with acute onset chest tightness, cough, and shortness of breath occurring during the work shift after heavy exposure to aerosolized organic matter; symptoms improve when away from work. Because symptoms are temporally related to inhalation of specific organic dusts and represent an acute occupational airway reaction, an airway disease due to specific organic dust diagnosis is used to document the exposure-related respiratory event. Typical codes: J66.0, J66.8
A 62-year-old former textile worker with known chronic obstructive symptoms now presents for management of hypoxemia and recurrent lower respiratory infections; chart review documents long-term exposure to cotton dust and the chronic airway disease is considered related to that organic dust exposure, serving as a comorbidity that affects prognosis and treatment decisions. Typical codes: J66.1, J66.2

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

ICD-10-CM Code	Description
J66.0	Byssinosis
J66.1	Flax-dressers' disease
J66.2	Cannabinosis
J66.8	Airway disease due to other specific organic dusts

DRG Code	Description
196	Interstitial Lung Disease with MCC
197	Interstitial Lung Disease with CC
198	Interstitial Lung Disease without CC/MCC

A 45-year-old farmer presents with progressive cough, wheeze, and exertional dyspnea over several months after repeated exposure to moldy hay and grain dust on the farm. Pulmonary function tests show an obstructive pattern with variability and the exposure history implicates organic agricultural dust as the etiologic agent, so a lung disease due to specific organic dust is assigned to capture the occupational/environmental cause of the airway disease. Typical codes: J66.0, J66.1
A 28-year-old worker in a mushroom-processing plant arrives at urgent care with acute onset chest tightness, cough, and shortness of breath occurring during the work shift after heavy exposure to aerosolized organic matter; symptoms improve when away from work. Because symptoms are temporally related to inhalation of specific organic dusts and represent an acute occupational airway reaction, an airway disease due to specific organic dust diagnosis is used to document the exposure-related respiratory event. Typical codes: J66.0, J66.8
A 62-year-old former textile worker with known chronic obstructive symptoms now presents for management of hypoxemia and recurrent lower respiratory infections; chart review documents long-term exposure to cotton dust and the chronic airway disease is considered related to that organic dust exposure, serving as a comorbidity that affects prognosis and treatment decisions. Typical codes: J66.1, J66.2

ICD-10-CM Code For Airway Disease Due To Specific Organic Dust: Group Overview

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ICD-10-CM J66: Airway Disease Due To Specific Organic Dust Overview

ICD-10-CM Code For Airway Disease Due To Specific Organic Dust: Group Overview

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ICD-10-CM J66: Airway Disease Due To Specific Organic Dust Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Airway Disease Due To Specific Organic Dust: Group Overview

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ICD-10-CM J66: Airway Disease Due To Specific Organic Dust Overview

ICD-10-CM Code For Airway Disease Due To Specific Organic Dust: Group Overview

Sign up for ICD-10-CM Code For Airway Disease Due To Specific Organic Dust: Group Overview policy alerts

ICD-10-CM J66: Airway Disease Due To Specific Organic Dust Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group `J66`?

Why is accurate coding within `J66` important for claims?

How does the `J66` group relate to DRG assignment?

What types of clinical presentations are captured by `J66` codes?

Can `J66` codes indicate the cause of the airway disease?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group `J66`?

Why is accurate coding within `J66` important for claims?

How does the `J66` group relate to DRG assignment?

What types of clinical presentations are captured by `J66` codes?

Can `J66` codes indicate the cause of the airway disease?

References