2027 ICD-10-CM Diagnosis Code J66Airway disease due to specific organic dust

ICD-10-CM Codes›J00–J99›J60-J70›J66

ICD-10-CM J66
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

J66 is a non-billable ICD-10-CM category code for airway disease due to specific organic dust, so it cannot be submitted on claims. Use a more specific code from this category instead, such as J66.0, J66.1, J66.2, and J66.8.

Code Identity

ICD-10-CM Code
J66
Billable Status
No — Non-Billable Category
Code Describes
Airway disease due to specific organic dust
Short Description
Airway disease due to specific organic dust
Same as the full description in the CMS dataset.
Chapter
J60-J70
Lung diseases due to external agents

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ60-J70Lung diseases due to external agents
CategoryJ66Airway disease due to specific organic dust
This CodeJ66Airway disease due to specific organic dust

Specific Coding for Airway disease due to specific organic dustOverview

Non-specific codes like J66 require more characters. Use one of these billable codes instead:

  • Use J66.0 for Byssinosis

  • Use J66.1 for Flax-dressers' disease

  • Use J66.2 for Cannabinosis

  • Use J66.8 for Airway disease due to other specific organic dusts

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to J66: its own notes plus those printed at block J60-J70 and Chapter 10. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On J66 itself
  • 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)
From Block J60-J70 Lung diseases due to external agents applies to 45 codes
  • asthma (J45.-)
  • malignant neoplasm of bronchus and lung (C34.-)
From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • smoke inhalation (T59.81-)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • code, where applicable, to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Notes

General instructions on how these codes are used.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name J66, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming J66: they are not reported together with it, unless the two conditions are unrelated.

  • J39.3 Upper respiratory tract hypersensitivity reaction, site unspecified
    pneumoconiosis (J60-J67.9) names J60-J67.9, which includes this code
  • J81 Pulmonary edema
    pulmonary edema due to external agents (J60-J70) names J60-J70, which includes this code

Excludes2 4

These codes carry an Excludes2 note naming J66: its condition is not part of those codes, and both may be reported when the patient has both.

  • J44.1 Chronic obstructive pulmonary disease with (acute) exacerbation
    lung diseases due to external agents (J60-J70) names J60-J70, which includes this code
  • J44.9 Chronic obstructive pulmonary disease, unspecified
    lung diseases due to external agents (J60-J70) names J60-J70, which includes this code
  • J45.909 Unspecified asthma, uncomplicated
    lung diseases due to external agents (J60-J70) names J60-J70, which includes this code
  • J84 Other interstitial pulmonary diseases
    lung diseases due to external agents (J60-J70) names J60-J70, which includes this code

Code First 1

These codes say to code first a condition named in the note, and J66 is one of the conditions named.

  • J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
    lung diseases due to external agents (J60-J70) names J60-J70, which includes this code

Use Additional Code 1

These codes say to use an additional code from the note, and J66 is one of the codes named.

  • Block T51-T65 Toxic effects of substances chiefly nonmedicinal as to source
    for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70) names J60-J70, which includes this code

Patient EducationClinical

Interstitial Lung Diseases

Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About J66Overview

What is the ICD-10 code for airway disease due to specific organic dust?

J66 is the ICD-10-CM category for airway disease due to specific organic dust, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is J66 (Airway disease due to specific organic dust) a billable code?

No. This is a category header that groups the codes for airway disease due to specific organic dust, and headers cannot be submitted on claims. Claims for airway disease due to specific organic dust need a more specific code from this category, such as J66.0, J66.1, and J66.2.