ICD-10-CM 2027
ICD-10 code for Byssinosis
From the official ICD-10-CM alphabetic index entry “Byssinosis”. Page updated September 29, 2026.
About coding Byssinosis
The ICD-10-CM code for Byssinosis is J66.0 (Byssinosis).
Within J66 (airway disease due to specific organic dust), J66.0 is specifically for Byssinosis. Related codes cover Flax-dressers' disease (J66.1), Cannabinosis (J66.2) and airway disease due to other specific organic dusts (J66.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 196 (Interstitial Lung Disease with MCC, relative weight 1.8336), DRG 197 (Interstitial Lung Disease with CC, relative weight 0.9492) and DRG 198 (Interstitial Lung Disease without CC/MCC, relative weight 0.7259), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Byssinosis ICD-10 codes
What is the ICD-10 code for Byssinosis?
- J66.0 — Byssinosis.
Is J66.0 billable?
- Yes. J66.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J66.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J66.0 as a principal diagnosis.
Is J66.0 a CC or MCC?
- No. J66.0 is neither a CC nor an MCC under MS-DRG v44.0.