O74.0 — Aspiration pneumonitis due to anesthesia during labor and delivery
Is O74.0 billable?
Yes — O74.0 is billable for FY2027. O74.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. O74.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.
O74.0 at a glance
| Code | O74.0 |
|---|---|
| Description | Aspiration pneumonitis due to anesthesia during labor and delivery |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does O74.0 group to?
O74.0 sits in MDC 14 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 998—
How is O74.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to O74.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Mendelson's syndrome › in labor and delivery (due to anesthesia)
- Mendelson's syndrome › obstetric (due to anesthesia)
- Syndrome › acid pulmonary aspiration, obstetric
- Syndrome › Mendelson's
- Pneumonitis › aspiration › obstetric (acute) (primary)
- Pneumonitis › postanesthetic › in labor and delivery (acute) (primary)
- Pneumonitis › postanesthetic › obstetric (acute) (primary)
- Pneumonitis › postoperative › obstetric (acute) (primary)
- Inhalation › stomach contents or secretions › due to anesthesiaor other sedation › in labor and delivery
- Pneumonitis › aspiration › due to › anesthesia › during › labor and delivery (acute) (primary)
Inclusion terms
Alternative wording in documentation that is classified to O74.0.
- Inhalation of stomach contents or secretions NOS due to anesthesia during labor and delivery
- Mendelson's syndrome due to anesthesia during labor and delivery
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O74.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O74.0 to fully describe the condition. O74.0 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Use additional code — inherited from O74
Report an additional code alongside O74.0 to fully describe the condition. O74.0 is sequenced first.
- code, if applicable, to identify specific complication
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O74.0, but a patient may have both at the same time. When documentation supports it, O74.0 and the excluded code may both be reported.
How long has O74.0 existed?
O74.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with O74.0?
ICD-10-CM declares these codes mutually exclusive with O74.0 — exactly one of each pair can be correct for a given encounter.
Which conditions are coded to O74.0?
What other codes are in the O74 family? (9)
- O74.1Other pulmonary complications of anesthesia during labor and delivery
- O74.2Cardiac complications of anesthesia during labor and delivery
- O74.3Central nervous system complications of anesthesia during labor and delivery
- O74.4Toxic reaction to local anesthesia during labor and delivery
- O74.5Spinal and epidural anesthesia-induced headache during labor and delivery
- O74.6Other complications of spinal and epidural anesthesia during labor and delivery
- O74.7Failed or difficult intubation for anesthesia during labor and delivery
- O74.8Other complications of anesthesia during labor and delivery
- O74.9Complication of anesthesia during labor and delivery, unspecified