O66 – Other obstructed labor
ICD-10-CM 2027 diagnosis code · Complications of labor and delivery
ICD-10-CM code
O66
- Code
O66(claims format:O66)- Description
- Other obstructed labor
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 15. Pregnancy, childbirth and the puerperium (O00-O9A)
- Block
- O60-O77 Complications of labor and delivery
Billable codes under O66
O66 is a header code and cannot be used on claims. Choose the most specific code:
- O66.0 – Obstructed labor due to shoulder dystociaBillable
- O66.1 – Obstructed labor due to locked twinsBillable
- O66.2 – Obstructed labor due to unusually large fetusBillable
- O66.3 – Obstructed labor due to other abnormalities of fetusBillable
- O66.4 – Failed trial of laborHeader (more codes below)
- O66.5 – Attempted application of vacuum extractor and forcepsBillable
- O66.6 – Obstructed labor due to other multiple fetusesBillable
- O66.8 – Other specified obstructed laborBillable
- O66.9 – Obstructed labor, unspecifiedBillable
Frequently asked questions
What is ICD-10 code O66?
O66 is the ICD-10-CM code for other obstructed labor, in the block O60-O77 (Complications of labor and delivery).
Is O66 a billable code?
No. O66 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.