ICD-10-CM 2027
ICD-10 code for chemotherapy pneumonitis
From the official ICD-10-CM alphabetic index entry “Pneumonitis (acute) (primary) › chemotherapy”. Page updated September 29, 2026.
About coding chemotherapy pneumonitis
The ICD-10-CM code for chemotherapy pneumonitis is J70.4 (Drug-induced interstitial lung disorders, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J70.4.
Within J70, choose J70.4 (Drug-induced interstitial lung disorders, unspecified) only when documentation doesn't support a more specific option: acute pulmonary manifestations due to radiation (J70.0), chronic and other pulmonary manifestations due to radiation (J70.1), acute drug-induced interstitial lung disorders (J70.2), chronic drug-induced interstitial lung disorders (J70.3), respiratory conditions due to smoke inhalation (J70.5), respiratory conditions due to other specified external agents (J70.8) and respiratory conditions due to unspecified external agent (J70.9).
Don't report J70.4 together with the conditions in its Excludes1 note: interstitial pneumonia NOS (J84.9) and lymphoid interstitial pneumonia (J84.2).
Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
More specific chemotherapy pneumonitis codes (official index)
Don't confuse with (Excludes1 for J70.4)
Common questions about chemotherapy pneumonitis ICD-10 codes
What is the ICD-10 code for chemotherapy pneumonitis?
- J70.4 — Drug-induced interstitial lung disorders, unspecified. More specific codes apply when the documentation supports them: J70.2, J70.3.
What is the ICD-10 code for acute chemotherapy pneumonitis?
- J70.2 — Acute drug-induced interstitial lung disorders.
What is the ICD-10 code for chronic chemotherapy pneumonitis?
- J70.3 — Chronic drug-induced interstitial lung disorders.
Is J70.4 billable?
- Yes. J70.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J70.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J70.4 as a principal diagnosis.
Is J70.4 a CC or MCC?
- No. J70.4 is neither a CC nor an MCC under MS-DRG v44.0.