ICD-10-CM 2027 diagnosis code
O29Complications of anesthesia during pregnancy
Not billable — use a more specific code
O29 is a header code, so it can't be reported by itself. Choose one of the 9 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
O29 is the ICD-10-CM diagnosis code for complications of anesthesia during pregnancy. It belongs to 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 9 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: O29.0 (pregnancy), O29.1 (pregnancy), O29.2 (pregnancy), O29.3 (pregnancy), O29.4 (pregnancy), O29.5 (pregnancy), O29.6 (pregnancy), O29.8 (pregnancy) and 1 more.
The conditions in its Excludes2 note aren't part of O29, but may be coded alongside it if the patient has both: complications of anesthesia during labor and delivery (O74.-) and complications of anesthesia during the puerperium (O89.-).
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
- O29.0Pulmonary complications of anesthesia during pregnancy
- O29.01Aspiration pneumonitis due to anesthesia during pregnancy
- 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
- O29.02Pressure collapse of lung due to anesthesia during pregnancy
- O29.021Pressure collapse of lung due to anesthesia during pregnancy, first trimesterBillable
- O29.022Pressure collapse of lung due to anesthesia during pregnancy, second trimesterBillable
- O29.023Pressure collapse of lung due to anesthesia during pregnancy, third trimesterBillable
- O29.029Pressure collapse of lung due to anesthesia during pregnancy, unspecified trimesterBillable
- O29.09Other pulmonary complications of anesthesia during pregnancy
- O29.091Other pulmonary complications of anesthesia during pregnancy, first trimesterBillable
- O29.092Other pulmonary complications of anesthesia during pregnancy, second trimesterBillable
- O29.093Other pulmonary complications of anesthesia during pregnancy, third trimesterBillable
- O29.099Other pulmonary complications of anesthesia during pregnancy, unspecified trimesterBillable
- O29.01Aspiration pneumonitis due to anesthesia during pregnancy
- O29.1Cardiac complications of anesthesia during pregnancy
- O29.11Cardiac arrest due to anesthesia during pregnancy
- O29.111Cardiac arrest due to anesthesia during pregnancy, first trimesterBillable
- O29.112Cardiac arrest due to anesthesia during pregnancy, second trimesterBillable
- O29.113Cardiac arrest due to anesthesia during pregnancy, third trimesterBillable
- O29.119Cardiac arrest due to anesthesia during pregnancy, unspecified trimesterBillable
- O29.12Cardiac failure due to anesthesia during pregnancy
- O29.121Cardiac failure due to anesthesia during pregnancy, first trimesterBillable
- O29.122Cardiac failure due to anesthesia during pregnancy, second trimesterBillable
- O29.123Cardiac failure due to anesthesia during pregnancy, third trimesterBillable
- O29.129Cardiac failure due to anesthesia during pregnancy, unspecified trimesterBillable
- O29.19Other cardiac complications of anesthesia during pregnancy
- O29.191Other cardiac complications of anesthesia during pregnancy, first trimesterBillable
- O29.192Other cardiac complications of anesthesia during pregnancy, second trimesterBillable
- O29.193Other cardiac complications of anesthesia during pregnancy, third trimesterBillable
- O29.199Other cardiac complications of anesthesia during pregnancy, unspecified trimesterBillable
- O29.11Cardiac arrest due to anesthesia during pregnancy
- O29.2Central nervous system complications of anesthesia during pregnancy
- O29.21Cerebral anoxia due to anesthesia during pregnancy
- O29.211Cerebral anoxia due to anesthesia during pregnancy, first trimesterBillable
- O29.212Cerebral anoxia due to anesthesia during pregnancy, second trimesterBillable
- O29.213Cerebral anoxia due to anesthesia during pregnancy, third trimesterBillable
- O29.219Cerebral anoxia due to anesthesia during pregnancy, unspecified trimesterBillable
- O29.29Other central nervous system complications of anesthesia during pregnancy
- O29.291Other central nervous system complications of anesthesia during pregnancy, first trimesterBillable
- O29.292Other central nervous system complications of anesthesia during pregnancy, second trimesterBillable
- O29.293Other central nervous system complications of anesthesia during pregnancy, third trimesterBillable
- O29.299Other central nervous system complications of anesthesia during pregnancy, unspecified trimesterBillable
- O29.21Cerebral anoxia due to anesthesia during pregnancy
- O29.3Toxic reaction to local anesthesia during pregnancy
- O29.3XToxic reaction to local anesthesia during pregnancy
- O29.3X1Toxic reaction to local anesthesia during pregnancy, first trimesterBillable
- O29.3X2Toxic reaction to local anesthesia during pregnancy, second trimesterBillable
- O29.3X3Toxic reaction to local anesthesia during pregnancy, third trimesterBillable
- O29.3X9Toxic reaction to local anesthesia during pregnancy, unspecified trimesterBillable
- O29.3XToxic reaction to local anesthesia during pregnancy
- O29.4Spinal and epidural anesthesia induced headache during pregnancy
- O29.40Spinal and epidural anesthesia induced headache during pregnancy, unspecified trimesterBillable
- O29.41Spinal and epidural anesthesia induced headache during pregnancy, first trimesterBillable
- O29.42Spinal and epidural anesthesia induced headache during pregnancy, second trimesterBillable
- O29.43Spinal and epidural anesthesia induced headache during pregnancy, third trimesterBillable
- O29.5Other complications of spinal and epidural anesthesia during pregnancy
- O29.5XOther complications of spinal and epidural anesthesia during pregnancy
- O29.5X1Other complications of spinal and epidural anesthesia during pregnancy, first trimesterBillable
- O29.5X2Other complications of spinal and epidural anesthesia during pregnancy, second trimesterBillable
- O29.5X3Other complications of spinal and epidural anesthesia during pregnancy, third trimesterBillable
- O29.5X9Other complications of spinal and epidural anesthesia during pregnancy, unspecified trimesterBillable
- O29.5XOther complications of spinal and epidural anesthesia during pregnancy
- O29.6Failed or difficult intubation for anesthesia during pregnancy
- O29.60Failed or difficult intubation for anesthesia during pregnancy, unspecified trimesterBillable
- O29.61Failed or difficult intubation for anesthesia during pregnancy, first trimesterBillable
- O29.62Failed or difficult intubation for anesthesia during pregnancy, second trimesterBillable
- O29.63Failed or difficult intubation for anesthesia during pregnancy, third trimesterBillable
- O29.8Other complications of anesthesia during pregnancy
- O29.8XOther complications of anesthesia during pregnancy
- O29.8X1Other complications of anesthesia during pregnancy, first trimesterBillable
- O29.8X2Other complications of anesthesia during pregnancy, second trimesterBillable
- O29.8X3Other complications of anesthesia during pregnancy, third trimesterBillable
- O29.8X9Other complications of anesthesia during pregnancy, unspecified trimesterBillable
- O29.8XOther complications of anesthesia during pregnancy
- O29.9Unspecified complication of anesthesia during pregnancy
- O29.90Unspecified complication of anesthesia during pregnancy, unspecified trimesterBillable
- O29.91Unspecified complication of anesthesia during pregnancy, first trimesterBillable
- O29.92Unspecified complication of anesthesia during pregnancy, second trimesterBillable
- O29.93Unspecified complication of anesthesia during pregnancy, third trimesterBillable
Coding notes
IncludesFurther defines the content of the category
- maternal complications arising from the administration of a general, regional or local anesthetic, analgesic or other sedation during pregnancy
Excludes2Not included here — may be reported together if both conditions exist
Use additional codeAdd a secondary code to fully describe the condition
- code, if necessary, to identify the complication
Notes that apply from higher levels
Instructions written at a parent level also apply to O29.
Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.
Codes whose notes reference O29
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
Is O29 billable?
- No. O29 is a header code. Report one of its more specific subcodes instead.