ICD-10-CM 2027
ICD-10 code for pneumonitis
From the official ICD-10-CM alphabetic index entry “Pneumonitis (acute) (primary)”. Page updated September 29, 2026.
About coding pneumonitis
The ICD-10-CM code for pneumonitis is J98.4 (Other disorders of lung). The official index lists 77 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J98.4.
Within J98, choose J98.4 (Other disorders of lung) only when documentation doesn't support a more specific option: diseases of bronchus, not elsewhere classified (J98.0), pulmonary collapse (J98.1), interstitial emphysema (J98.2), Compensatory emphysema (J98.3), diseases of mediastinum, not elsewhere classified (J98.5), disorders of diaphragm (J98.6), other specified respiratory disorders (J98.8) and respiratory disorder, unspecified (J98.9).
Don't report J98.4 together with the conditions in its Excludes1 note: acute interstitial pneumonitis (J84.114) and pulmonary insufficiency following surgery (J95.1-J95.2).
Use an additional code 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.-) and 1 more.
More specific pneumonitis codes (official index)
- air-conditioner J67.7 — Air conditioner and humidifier lung
- allergic (due to) J67.9 — Hypersensitivity pneumonitis due to unspecified organic dust
- organic dust NEC J67.8 — Hypersensitivity pneumonitis due to other organic dusts
- red cedar dust J67.8 — Hypersensitivity pneumonitis due to other organic dusts
- sequoiosis J67.8 — Hypersensitivity pneumonitis due to other organic dusts
- wood dust J67.8 — Hypersensitivity pneumonitis due to other organic dusts
- aspiration J69.0 — Pneumonitis due to inhalation of food and vomit
- due to
- anesthesia J95.4 — Chemical pneumonitis due to anesthesia
- during
- labor and delivery O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery
- pregnancy O29.01 — Aspiration pneumonitis due to anesthesia during pregnancy
- puerperium O89.01 — Aspiration pneumonitis due to anesthesia during the puerperium
- fumes or gases J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- obstetric O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery
- chemical (due to gases, fumes or vapors) (inhalation) J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- due to anesthesia J95.4 — Chemical pneumonitis due to anesthesia
- chemotherapy J70.4 — Drug-induced interstitial lung disorders, unspecified
- acute J70.2 — Acute drug-induced interstitial lung disorders
- chronic J70.3 — Chronic drug-induced interstitial lung disorders
- cholesterol J84.89 — Other specified interstitial pulmonary diseases
- crack (cocaine) J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- chronic
- congenital rubella P35.0 — Congenital rubella syndrome
- due to
- beryllium J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- cadmium J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- crack (cocaine) J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- detergent J69.8 — Pneumonitis due to inhalation of other solids and liquids
- fluorocarbon-polymer J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- food, vomit (aspiration) J69.0 — Pneumonitis due to inhalation of food and vomit
- fumes or vapors J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- gases, fumes or vapors (inhalation) J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- inhalation
- blood J69.8 — Pneumonitis due to inhalation of other solids and liquids
- essences J69.1 — Pneumonitis due to inhalation of oils and essences
- food (regurgitated), milk, vomit J69.0 — Pneumonitis due to inhalation of food and vomit
- oils, essences J69.1 — Pneumonitis due to inhalation of oils and essences
- saliva J69.0 — Pneumonitis due to inhalation of food and vomit
- solids, liquids NEC J69.8 — Pneumonitis due to inhalation of other solids and liquids
- manganese J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- nitrogen dioxide J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- oils, essences J69.1 — Pneumonitis due to inhalation of oils and essences
- solids, liquids NEC J69.8 — Pneumonitis due to inhalation of other solids and liquids
- toxoplasmosis (acquired) B58.3 — Pulmonary toxoplasmosis
- congenital P37.1 — Congenital toxoplasmosis
- vanadium J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
- ventilator J95.851 — Ventilator associated pneumonia
- eosinophilic J82.81 — Chronic eosinophilic pneumonia
- acute J82.82 — Acute eosinophilic pneumonia
- chronic J82.81 — Chronic eosinophilic pneumonia
- hypersensitivity J67.9 — Hypersensitivity pneumonitis due to unspecified organic dust
- air conditioner lung J67.7 — Air conditioner and humidifier lung
- bagassosis J67.1 — Bagassosis
- bird fancier's lung J67.2 — Bird fancier's lung
- farmer's lung J67.0 — Farmer's lung
- maltworker's lung J67.4 — Maltworker's lung
- maple bark-stripper's lung J67.6 — Maple-bark-stripper's lung
- mushroom worker's lung J67.5 — Mushroom-worker's lung
- specified organic dust NEC J67.8 — Hypersensitivity pneumonitis due to other organic dusts
- suberosis J67.3 — Suberosis
- interstitial (chronic) J84.89 — Other specified interstitial pulmonary diseases
- acute J84.114 — Acute interstitial pneumonitis
- lymphoid J84.2 — Lymphoid interstitial pneumonia
- non-specific J84.89 — Other specified interstitial pulmonary diseases
- idiopathic J84.113 — Idiopathic non-specific interstitial pneumonitis
- lymphoid, interstitial J84.2 — Lymphoid interstitial pneumonia
- meconium P24.01 — Meconium aspiration with respiratory symptoms
- noninfectious J98.4 — Other disorders of lung
- postanesthetic J95.4 — Chemical pneumonitis due to anesthesia
- correct substance properly administered
- in labor and delivery O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery
- in pregnancy O29.01 — Aspiration pneumonitis due to anesthesia during pregnancy
- obstetric O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery
- overdose or wrong substance given or taken (by accident)
- postpartum, puerperal O89.01 — Aspiration pneumonitis due to anesthesia during the puerperium
- postoperative J95.4 — Chemical pneumonitis due to anesthesia
- obstetric O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery
- radiation J70.0 — Acute pulmonary manifestations due to radiation
- rubella, congenital P35.0 — Congenital rubella syndrome
- specified NEC J98.4 — Other disorders of lung
- ventilation (air-conditioning) J67.7 — Air conditioner and humidifier lung
- ventilator associated J95.851 — Ventilator associated pneumonia
- wood-dust J67.8 — Hypersensitivity pneumonitis due to other organic dusts
Don't confuse with (Excludes1 for J98.4)
Common questions about pneumonitis ICD-10 codes
What is the ICD-10 code for pneumonitis?
- J98.4 — Other disorders of lung. More specific codes apply when the documentation supports them: J67.7, J67.9, J67.8, J67.8 and others below.
What is the ICD-10 code for air-conditioner pneumonitis?
- J67.7 — Air conditioner and humidifier lung.
What is the ICD-10 code for allergic pneumonitis?
- J67.9 — Hypersensitivity pneumonitis due to unspecified organic dust.
What is the ICD-10 code for aspiration pneumonitis?
- J69.0 — Pneumonitis due to inhalation of food and vomit.
What is the ICD-10 code for chemical pneumonitis?
- J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors.
What is the ICD-10 code for chemotherapy pneumonitis?
- J70.4 — Drug-induced interstitial lung disorders, unspecified.
What is the ICD-10 code for cholesterol pneumonitis?
- J84.89 — Other specified interstitial pulmonary diseases.
Is J98.4 billable?
- Yes. J98.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J98.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J98.4 as a principal diagnosis.
Is J98.4 a CC or MCC?
- No. J98.4 is neither a CC nor an MCC under MS-DRG v44.0.