ICD-10-CM > J00-J99 > J40-J4A > J44 > J44.9 J44.9 Chronic obstructive pulmonary disease, unspecified Billable/Specific Copy Code Copy Description Applicable To Chronic obstructive airway disease NOSChronic obstructive lung disease NOS Type 2 Excludes lung diseases due to external agents (J60-J70)