O74.0 Aspiration pneumonitis due to anesthesia during labor and delivery

Billable ICD-10-CM code, FY2026.

Applicable to

• Inhalation of stomach contents or secretions NOS due to anesthesia during labor and delivery
• Mendelson's syndrome due to anesthesia during labor and delivery

Applies from O74 Complications of anesthesia during labor and delivery

Includes

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

Use additional code

• code, if applicable, to identify specific complication

MS-DRG index

Defines the logic of DRG(s) 998 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 668.01 Pulmonary complications of anesthesia or other sedation in labor and delivery, delivered, with or without mention of antepartum condition (approximate)
• 668.02 Pulmonary complications of anesthesia or other sedation in labor and delivery, delivered, with mention of postpartum complication (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O74.0

Back-references to O74.0

• Type 2 Excludes: J12 Viral pneumonia, not elsewhere classified ("aspiration pneumonia due to anesthesia during labor and delivery (O74.0)")
• Type 2 Excludes: J18 Pneumonia, unspecified organism ("aspiration pneumonia due to anesthesia during labor and delivery (O74.0)")
• Type 1 Excludes: J69.0 Pneumonitis due to inhalation of food and vomit ("obstetric aspiration pneumonitis (O74.0)")
• Type 1 Excludes: J95.4 Chemical pneumonitis due to anesthesia ("aspiration pneumonitis due to anesthesia complicating labor and delivery (O74.0)")

Back-references to O74

• Type 2 Excludes: O29 Complications of anesthesia during pregnancy ("complications of anesthesia during labor and delivery (O74.-)")
• Type 2 Excludes: O75.4 Other complications of obstetric surgery and procedures ("complications of anesthesia during labor and delivery (O74.-)")
• Type 1 Excludes: T41 Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases ("complications of anesthesia during labor and delivery (O74.-)")
• Type 2 Excludes: T88 Other complications of surgical and medical care, not elsewhere classified ("complications of anesthesia in labor and delivery (O74.-)")
• Type 1 Excludes: T88.2 Shock due to anesthesia ("labor and delivery (O74.-)")

Diagnosis Index entries for O74.0

• Inhalation › stomach contents or secretions › due to anesthesia (general) (local) or other sedation › in labor and delivery
• Mendelson's syndrome (due to anesthesia) › in labor and delivery
• Mendelson's syndrome (due to anesthesia) › obstetric
• Pneumonitis (acute) (primary) › aspiration › due to › anesthesia › during › labor and delivery
• Pneumonitis (acute) (primary) › aspiration › obstetric
• Pneumonitis (acute) (primary) › postanesthetic › in labor and delivery
• Pneumonitis (acute) (primary) › postanesthetic › obstetric
• Pneumonitis (acute) (primary) › postoperative › obstetric
• Syndrome › acid pulmonary aspiration, obstetric
• Syndrome › Mendelson's

Nearby codes

• O74 Complications of anesthesia during labor and delivery
• O74.0 Aspiration pneumonitis due to anesthesia during labor and delivery (this code)
• O74.1 Other pulmonary complications of anesthesia during labor and delivery
• O74.2 Cardiac complications of anesthesia during labor and delivery
• O74.3 Central nervous system complications of anesthesia during labor and delivery
• O74.4 Toxic reaction to local anesthesia during labor and delivery
• O74.5 Spinal and epidural anesthesia-induced headache during labor and delivery