Other obstructed labor (O66) ICD-10-CM
The O66 code range covers other obstructed labor with 12 ICD-10-CM diagnosis codes. 10 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the O66 Range 12 codes · 10 billable
- O66 Other obstructed laborNon-billable
- O66.0 Obstructed labor due to shoulder dystocia
- O66.1 Obstructed labor due to locked twins
- O66.2 Obstructed labor due to unusually large fetus
- O66.3 Obstructed labor due to other abnormalities of fetus
- O66.4 Failed trial of laborNon-billable
- O66.40 Failed trial of labor, unspecified
- O66.41 Failed attempted vaginal birth after previous cesarean delivery
- O66.5 Attempted application of vacuum extractor and forceps
- O66.6 Obstructed labor due to other multiple fetuses
- O66.8 Other specified obstructed labor
- O66.9 Obstructed labor, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the O66 range.
Dystocia
Slow or difficult OBSTETRIC LABOR or CHILDBIRTH.
About the O66 Code Range
These codes describe obstructed labor, failed trials of labor, and attempted application of a vacuum extractor and forceps.
The obstructed labor subdivisions identify shoulder dystocia (O66.0), locked twins (O66.1), an unusually large fetus (O66.2), other fetal abnormalities (O66.3), or other multiple fetuses (O66.6). Failed trial of labor (O66.4) separates an unspecified trial (O66.40) from an attempted vaginal birth after a previous cesarean delivery (O66.41). Other subdivisions identify attempted application of a vacuum extractor and forceps (O66.5), other specified obstructed labor (O66.8), and unspecified obstructed labor (O66.9).
Questions About This Page
How many billable codes are in the O66 range?
Of the 12 codes in this range, 10 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the O66 range classify?
The range classifies other obstructed labor. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
