ICD-10-CM 2027 diagnosis code
O29.01Aspiration pneumonitis due to anesthesia during pregnancy
O29.01 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O29.01
O29.01 is the ICD-10-CM diagnosis code for aspiration pneumonitis due to anesthesia during pregnancy. It belongs to category O29 (complications of anesthesia during pregnancy), block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
Within O29.0 (pulmonary complications of anesthesia during pregnancy), O29.01 is specifically for aspiration pneumonitis due to anesthesia during pregnancy. Related codes cover pressure collapse of lung due to anesthesia during pregnancy (O29.02) and other pulmonary complications of anesthesia during pregnancy (O29.09).
To report this condition, pick the subcode that matches the documentation: O29.011 (first trimester), O29.012 (second trimester), O29.013 (third trimester) and O29.019 (unspecified trimester).
Use an additional code, if necessary, to identify the complication.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under O29.01
- O29.011Aspiration pneumonitis due to anesthesia during pregnancy, first trimesterBillable
- O29.012Aspiration pneumonitis due to anesthesia during pregnancy, second trimesterBillable
- O29.013Aspiration pneumonitis due to anesthesia during pregnancy, third trimesterBillable
- O29.019Aspiration pneumonitis due to anesthesia during pregnancy, unspecified trimesterBillable
Coding notes
- Inhalation of stomach contents or secretions NOS due to anesthesia during pregnancy
- Mendelson's syndrome due to anesthesia during pregnancy
Notes that apply from higher levels
Instructions written at a parent level also apply to O29.01.
› From O29 Complications of anesthesia during pregnancy
- maternal complications arising from the administration of a general, regional or local anesthetic, analgesic or other sedation during pregnancy
- code, if necessary, to identify the complication
Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.
Alphabetic index entries
7 entriesTerms in the official ICD-10-CM index that lead to O29.01.
- Inhalation › stomach contents or secretions › due to anesthesia (general) (local) or other sedation › in pregnancy
- Mendelson's syndrome (due to anesthesia) › in pregnancy
- Pneumonitis (acute) (primary) › aspiration › due to › anesthesia › during › pregnancy
- Pneumonitis (acute) (primary) › postanesthetic › in pregnancy
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › adverse effect anesthesia › aspiration pneumonitis
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › adverse effect anesthesia › inhalation of stomach contents or secretions NOS
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › adverse effect anesthesia › Mendelson's syndrome
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O29.01
Is O29.01 billable?
- No. O29.01 is a header code. Report one of its more specific subcodes instead.