O89.01 Aspiration pneumonitis due to anesthesia during the puerperium

The ICD-10-CM code for Aspiration pneumonitis due to anesthesia during the puerperium is O89.01 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

O85-O92: Complications predominantly related to the puerperium (O85-O92)

Category O89

12 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O89.01:

• Mendelson's syndrome (due to anesthesia) › postpartum, puerperal
• Pneumonitis (acute) (primary) › postanesthetic › postpartum, puerperal
• Inhalation › stomach contents or secretions › due to anesthesia (general) (local) or other sedation › postpartum, puerperal
• Pneumonitis (acute) (primary) › aspiration › due to › anesthesia › during › puerperium

Inclusion Terms

• Inhalation of stomach contents or secretions NOS due to anesthesia during the puerperium
• Mendelson's syndrome due to anesthesia during the puerperium

U.S. Hospital Utilization

O89.01 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)