J66.1 Flax-dressers' disease

Billable ICD-10-CM code, FY2026.

Applies from J66 Airway disease due to specific organic dust

Excludes2 (not included here)

• 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)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders
• CMS-HCC V22: HCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders
• ESRD V24: HCC 112

MS-DRG index

Defines the logic of DRG(s) 196-198 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 504 Pneumonopathy due to inhalation of other dust (approximate)

Code annotations containing back-references to J66.1

Back-references to J66

• Type 2 Excludes: J44.1 Chronic obstructive pulmonary disease with (acute) exacerbation ("lung diseases due to external agents (J60-J70)")
• Type 2 Excludes: J44.9 Chronic obstructive pulmonary disease, unspecified ("lung diseases due to external agents (J60-J70)")
• Type 2 Excludes: J45.909 Unspecified asthma, uncomplicated ("lung diseases due to external agents (J60-J70)")
• Type 1 Excludes: J81 Pulmonary edema ("pulmonary edema due to external agents (J60-J70)")
• Type 2 Excludes: J84 Other interstitial pulmonary diseases ("lung diseases due to external agents (J60-J70)")
• Code First: J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere ("lung diseases due to external agents (J60-J70)")

Diagnosis Index entries for J66.1

• Disease, diseased › flax-dresser's
• Flax-dresser's disease

Nearby codes

• J66 Airway disease due to specific organic dust
• J66.0 Byssinosis
• J66.1 Flax-dressers' disease (this code)
• J66.2 Cannabinosis
• J66.8 Airway disease due to other specific organic dusts