ICD-10-CM 2027 diagnosis code
O29.4Spinal and epidural anesthesia induced headache during pregnancy
O29.4 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.Short description: Spinal and epidural anesth induced headache during pregnancy
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 O29.4
O29.4 is the ICD-10-CM diagnosis code for spinal and epidural anesthesia induced headache 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 (complications of anesthesia during pregnancy), O29.4 is specifically for spinal and epidural anesthesia induced headache during pregnancy. Related codes cover pulmonary complications of anesthesia during pregnancy (O29.0), cardiac complications of anesthesia during pregnancy (O29.1), central nervous system complications of anesthesia during pregnancy (O29.2), toxic reaction to local anesthesia during pregnancy (O29.3), other complications of spinal and epidural anesthesia during pregnancy (O29.5), failed or difficult intubation for anesthesia during pregnancy (O29.6), other complications of anesthesia during pregnancy (O29.8) and unspecified complication of anesthesia during pregnancy (O29.9).
To report this condition, pick the subcode that matches the documentation: O29.40 (unspecified trimester), O29.41 (first trimester), O29.42 (second trimester) and O29.43 (third 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 O29.4
- 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
Notes that apply from higher levels
Instructions written at a parent level also apply to O29.4.
› 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
2 entriesTerms in the official ICD-10-CM index that lead to O29.4.
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 O29.4
Is O29.4 billable?
- No. O29.4 is a header code. Report one of its more specific subcodes instead.