2027 ICD-10-CM Diagnosis Code O29Complications of anesthesia during pregnancy

ICD-10-CM Codes›O00-O9A›O20-O29›O29

ICD-10-CM O29
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

O29 is a non-billable ICD-10-CM category code for complications of anesthesia during pregnancy, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O29.011, O29.012, O29.013, and O29.019.

Code Identity

ICD-10-CM Code
O29
Billable Status
No — Non-Billable Category
Code Describes
Complications of anesthesia during pregnancy
Short Description
Complications of anesthesia during pregnancy
Same as the full description in the CMS dataset.
Chapter
O20-O29
Other maternal disorders predominantly related to pregnancy

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO20-O29Other maternal disorders predominantly related to pregnancy
CategoryO29Complications of anesthesia during pregnancy
This CodeO29Complications of anesthesia during pregnancy

Specific Coding for Complications of anesthesia during pregnancyOverview

Non-specific codes like O29 require more characters. Use one of these billable codes instead:

  • O29.0 for Pulmonary complications of anesthesia during pregnancy

  • O29.01 for Aspiration pneumonitis due to anesthesia during pregnancy

  • O29.02 for Pressure collapse of lung due to anesthesia during pregnancy

  • O29.09 for Other pulmonary complications of anesthesia during pregnancy

  • O29.1 for Cardiac complications of anesthesia during pregnancy

  • O29.11 for Cardiac arrest due to anesthesia during pregnancy

  • O29.12 for Cardiac failure due to anesthesia during pregnancy

  • O29.19 for Other cardiac complications of anesthesia during pregnancy

  • O29.2 for Central nervous system complications of anesthesia during pregnancy

  • O29.21 for Cerebral anoxia due to anesthesia during pregnancy

  • O29.29 for Other central nervous system complications of anesthesia during pregnancy

  • O29.3 for Toxic reaction to local anesthesia during pregnancy

  • O29.3X for Toxic reaction to local anesthesia during pregnancy

  • O29.4 for Spinal and epidural anesthesia induced headache during pregnancy

  • Use O29.40 for Spinal and epidural anesthesia induced headache during pregnancy, unspecified trimester

  • Use O29.41 for Spinal and epidural anesthesia induced headache during pregnancy, first trimester

  • Use O29.42 for Spinal and epidural anesthesia induced headache during pregnancy, second trimester

  • Use O29.43 for Spinal and epidural anesthesia induced headache during pregnancy, third trimester

  • O29.5 for Other complications of spinal and epidural anesthesia during pregnancy

  • O29.5X for Other complications of spinal and epidural anesthesia during pregnancy

  • O29.6 for Failed or difficult intubation for anesthesia during pregnancy

  • Use O29.60 for Failed or difficult intubation for anesthesia during pregnancy, unspecified trimester

  • Use O29.61 for Failed or difficult intubation for anesthesia during pregnancy, first trimester

  • Use O29.62 for Failed or difficult intubation for anesthesia during pregnancy, second trimester

  • Use O29.63 for Failed or difficult intubation for anesthesia during pregnancy, third trimester

  • O29.8 for Other complications of anesthesia during pregnancy

  • O29.8X for Other complications of anesthesia during pregnancy

  • O29.9 for Unspecified complication of anesthesia during pregnancy

  • Use O29.90 for Unspecified complication of anesthesia during pregnancy, unspecified trimester

  • Use O29.91 for Unspecified complication of anesthesia during pregnancy, first trimester

  • Use O29.92 for Unspecified complication of anesthesia during pregnancy, second trimester

  • Use O29.93 for Unspecified complication of anesthesia during pregnancy, third trimester

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O29: its own notes plus those printed at block O20-O29 and Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • maternal complications arising from the administration of a general, regional or local anesthetic, analgesic or other sedation during pregnancy

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On O29 itself
  • complications of anesthesia during labor and delivery (O74.-)
  • complications of anesthesia during the puerperium (O89.-)
From Block O20-O29 Other maternal disorders predominantly related to pregnancy applies to 260 codes
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

On O29 itself
  • code, if necessary, to identify the complication
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name O29, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming O29: they are not reported together with it, unless the two conditions are unrelated.

  • J95.4 Chemical pneumonitis due to anesthesia
    aspiration pneumonitis due to anesthesia complicating pregnancy (O29)
  • T41 Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases
    complications of anesthesia during pregnancy (O29.-)
  • T88.2 Shock due to anesthesia
    pregnancy (O29.-)

Excludes2 3

These codes carry an Excludes2 note naming O29: its condition is not part of those codes, and both may be reported when the patient has both.

  • J12 Viral pneumonia, not elsewhere classified
    aspiration pneumonia due to anesthesia during pregnancy (O29)
  • J18 Pneumonia, unspecified organism
    aspiration pneumonia due to anesthesia during pregnancy (O29)
  • T88 Other complications of surgical and medical care, not elsewhere classified
    complications of anesthesia in pregnancy (O29.-)

Patient EducationClinical

Anesthesia

Anesthesia is the use of medicines, called anesthetics, to prevent pain during surgery and other medical procedures. Medicine may be given by injection, inhalation, topical lotion, spray, eye drops, or a skin patch.

The full article covers:

  • What is anesthesia?
  • What is anesthesia used for?
  • What are the types of anesthesia?
  • What are the risks of anesthesia?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O29Overview

What is the ICD-10 code for complications of anesthesia during pregnancy?

O29 is the ICD-10-CM category for complications of anesthesia during pregnancy, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is O29 (Complications of anesthesia during pregnancy) a billable code?

No. This is a category header that groups the codes for complications of anesthesia during pregnancy, and headers cannot be submitted on claims. Claims for complications of anesthesia during pregnancy need a more specific code from this category, such as O29.011, O29.012, and O29.013.

Does O29 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code, if necessary, to identify the complication. The additional code is reported after O29.