J95.4 vs O74.0
J95.4 (Chemical pneumonitis due to anesthesia) compared with O74.0 (Aspiration pneumonitis due to anesthesia during labor and delivery), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. J95.4 carries an Excludes1 note covering O74.0: “aspiration pneumonitis due to anesthesia complicating labor and delivery (O74.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| J95.4Chemical pneumonitis due to anesthesia | O74.0Aspiration pneumonitis due to anesthesia during labor and delivery | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | J00-J99 — Diseases of the Respiratory System (J00-J99) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Chemical pneumonitis due to anesthesia is a billable ICD-10-CM diagnosis code (J95.4). | Aspiration pneumonitis due to anesthesia during labor and delivery is a billable ICD-10-CM diagnosis code (O74.0). |
| Includes | Mendelson's syndrome Postprocedural aspiration pneumonia | maternal complications arising from the administration of a general, regional or local anesthetic, analgesic or other sedation during labor and delivery Inhalation of stomach contents or secretions NOS due to anesthesia during labor and delivery Mendelson's syndrome due to anesthesia during labor and delivery |
| Use additional code | code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5) | code, if applicable, to identify specific complication |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources