O66

Non-Billable

ChapterO00–O9A

Rankcategory

Official Description

Other obstructed labor

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A).

CH15 Parent Instructions

Excludes1(Not coded here)

supervision of normal pregnancy (Z34.-)

Excludes2(Not included here)

mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
postpartum necrosis of pituitary gland (E23.0)
puerperal osteomalacia (M83.0)

Use Additional Code

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Clinical Hierarchy

CH15Pregnancy, childbirth and the puerperium (O00-O9A)

O60-O77Complications of labor and delivery (O60-O77)

O66Other obstructed labor

O66.0Obstructed labor due to shoulder dystocia

O66.1Obstructed labor due to locked twins

O66.2Obstructed labor due to unusually large fetus

O66.3Obstructed labor due to other abnormalities of fetus

O66.4Failed trial of labor

O66.5Attempted application of vacuum extractor and forceps

O66.6Obstructed labor due to other multiple fetuses

O66.8Other specified obstructed labor

O66.9Obstructed labor, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to O66:

chapterCH15

Pregnancy, childbirth and the puerperium (O00-O9A)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to O66. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths

Deformity1 unique routes

fetal

causing obstructed labor→O66

Delay, delayed1 unique routes

any plane in pelvis

complicating delivery→O66

Delivery (childbirth) (labor)23 unique routes

cesarean (for)(5 variants)

failed(5 variants)

forceps→O66

trial of labor NOS→O66(2 variants)

following previous cesarean delivery→O66

vacuum extraction→O66

ventouse→O66

complicated(18 variants)

by(18 variants)

attempted vacuum extraction and forceps→O66

dilatation

bladder→O66

failed(2 variants)

attempted vaginal birth after previous cesarean delivery→O66

trial of labor→O66

fetal

deformity→O66

obstructed labor(13 variants)

due to(13 variants)

dystocia (fetal)→O66(10 variants)

due to(8 variants)

conjoined twins→O66

fetal(6 variants)

abnormality NEC→O66

ascites→O66

hydrops→O66

meningomyelocele→O66

sacral teratoma→O66

tumor→O66

hydrocephalic fetus→O66

shoulder→O66

impacted shoulders→O66

large fetus→O66

locked twins→O66

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Other obstructed labor.

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