O74.0 Aspiration pneumonitis due to anesthesia during labor and delivery

The ICD-10-CM code for Aspiration pneumonitis due to anesthesia during labor and delivery is O74.0 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O60-O77: Complications of labor and delivery (O60-O77)

Category O74

11 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O74.0:

• Mendelson's syndrome (due to anesthesia) › in labor and delivery
• Syndrome › Mendelson's
• Syndrome › acid pulmonary aspiration, obstetric
• Mendelson's syndrome (due to anesthesia) › obstetric
• Pneumonitis (acute) (primary) › aspiration › obstetric
• Pneumonitis (acute) (primary) › postoperative › obstetric
• Pneumonitis (acute) (primary) › postanesthetic › obstetric
• Pneumonitis (acute) (primary) › postanesthetic › in labor and delivery

Inclusion Terms

• Inhalation of stomach contents or secretions NOS due to anesthesia during labor and delivery
• Mendelson's syndrome due to anesthesia during labor and delivery

U.S. Hospital Utilization

O74.0 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)