ICD-10-CM 2027
ICD-10 code for Mendelson's syndrome
From the official ICD-10-CM alphabetic index entry “Mendelson's syndrome (due to anesthesia)”. Page updated September 29, 2026.
About coding Mendelson's syndrome
The ICD-10-CM code for Mendelson's syndrome is J95.4 (Chemical pneumonitis due to anesthesia). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J95.4.
Within J95 (intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified), J95.4 is specifically for chemical pneumonitis due to anesthesia. Related codes cover tracheostomy complications (J95.0), acute pulmonary insufficiency following thoracic surgery (J95.1), acute pulmonary insufficiency following nonthoracic surgery (J95.2), chronic pulmonary insufficiency following surgery (J95.3), postprocedural subglottic stenosis (J95.5), intraoperative hemorrhage and hematoma of a respiratory system organ or structure complicating a procedure (J95.6), accidental puncture and laceration of a respiratory system organ or structure during a procedure (J95.7) and other intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified (J95.8).
Don't report J95.4 together with the conditions in its Excludes1 note: aspiration pneumonitis due to anesthesia complicating labor and delivery (O74.0), aspiration pneumonitis due to anesthesia complicating pregnancy (O29) and aspiration pneumonitis due to anesthesia complicating the puerperium (O89.01).
Use an additional code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5).
More specific Mendelson's syndrome codes (official index)
- 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
- postpartum, puerperal O89.01 — Aspiration pneumonitis due to anesthesia during the puerperium
Don't confuse with (Excludes1 for J95.4)
Common questions about Mendelson's syndrome ICD-10 codes
What is the ICD-10 code for Mendelson's syndrome?
- J95.4 — Chemical pneumonitis due to anesthesia. More specific codes apply when the documentation supports them: O74.0, O29.01, O74.0, O89.01.
What is the ICD-10 code for obstetric mendelson's syndrome?
- O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery.
Is J95.4 billable?
- Yes. J95.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J95.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J95.4 as a principal diagnosis.
Is J95.4 a CC or MCC?
- J95.4 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.