O89.01 Aspiration pneumonitis due to anesthesia during the puerperium

Billable ICD-10-CM code, FY2026.

Applicable to

• Inhalation of stomach contents or secretions NOS due to anesthesia during the puerperium
• Mendelson's syndrome due to anesthesia during the puerperium

Applies from O89 Complications of anesthesia during the puerperium

Includes

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

Use additional code

• code, if applicable, to identify specific complication

MS-DRG index

Defines the logic of DRG(s) 769 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 668.04 Pulmonary complications of anesthesia or other sedation in labor and delivery, postpartum condition or 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 O89.01

Back-references to O89.01

• Type 1 Excludes: J95.4 Chemical pneumonitis due to anesthesia ("aspiration pneumonitis due to anesthesia complicating the puerperium (O89.01)")

Back-references to O89.0

• Type 2 Excludes: J12 Viral pneumonia, not elsewhere classified ("aspiration pneumonia due to anesthesia during puerperium (O89.0)")
• Type 2 Excludes: J18 Pneumonia, unspecified organism ("aspiration pneumonia due to anesthesia during puerperium (O89.0)")

Back-references to O89

• Type 2 Excludes: O29 Complications of anesthesia during pregnancy ("complications of anesthesia during the puerperium (O89.-)")
• Type 1 Excludes: T41 Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases ("complications of anesthesia during the puerperium (O89.-)")
• Type 2 Excludes: T88 Other complications of surgical and medical care, not elsewhere classified ("complications of anesthesia in puerperium (O89.-)")
• Type 1 Excludes: T88.2 Shock due to anesthesia ("puerperium (O89.-)")

Diagnosis Index entries for O89.01

• Inhalation › stomach contents or secretions › due to anesthesia (general) (local) or other sedation › postpartum, puerperal
• Mendelson's syndrome (due to anesthesia) › postpartum, puerperal
• Pneumonitis (acute) (primary) › aspiration › due to › anesthesia › during › puerperium
• Pneumonitis (acute) (primary) › postanesthetic › postpartum, puerperal

Nearby codes

• O89 Complications of anesthesia during the puerperium
• O89.0 Pulmonary complications of anesthesia during the puerperium
• O89.01 Aspiration pneumonitis due to anesthesia during the puerperium (this code)
• O89.09 Other pulmonary complications of anesthesia during the puerperium
• O89.1 Cardiac complications of anesthesia during the puerperium
• O89.2 Central nervous system complications of anesthesia during the puerperium
• O89.3 Toxic reaction to local anesthesia during the puerperium
• O89.4 Spinal and epidural anesthesia-induced headache during the puerperium