All ICD10 Codes

O66.3

Billable
ChapterO00–O9A
Ranksubcategory
Official Description

Obstructed labor due to other abnormalities of fetus

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A).

Instructional Notes

Includes
  • Dystocia due to fetal ascites
  • Dystocia due to fetal hydrops
  • Dystocia due to fetal meningomyelocele
  • Dystocia due to fetal sacral teratoma
  • Dystocia due to fetal tumor
  • Dystocia due to hydrocephalic fetus
Use Additional Code
  • code to identify cause of obstruction
General instructions are available for the parent sections:
View CH15 Notes

Clinical Hierarchy

CH15Pregnancy, childbirth and the puerperium (O00-O9A)
O60-O77Complications of labor and delivery (O60-O77)
O66Other obstructed labor
O66.3Obstructed labor due to other abnormalities of fetus

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to O66.3:

chapterCH15
Pregnancy, childbirth and the puerperium (O00-O9A)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to O66.3. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

14 raw paths
Deformity1 unique routes
fetal
causing obstructed labor→O66.3
Delivery (childbirth) (labor)9 unique routes
complicated(9 variants)
by(9 variants)
fetal
deformity→O66.3
obstructed labor(8 variants)
due to(8 variants)
dystocia (fetal)(8 variants)
due to(8 variants)
conjoined twins→O66.3
fetal(6 variants)
abnormality NEC→O66.3
ascites→O66.3
hydrops→O66.3
meningomyelocele→O66.3
sacral teratoma→O66.3
tumor→O66.3
hydrocephalic fetus→O66.3
Dystocia2 unique routes
fetal(2 variants)
abnormality NEC→O66.3
conjoined twins→O66.3
Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent)1 unique routes
causing disproportion
with obstructed labor→O66.3
Hydrops1 unique routes
causing obstructed labor (mother)→O66.3

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 817
Other Antepartum Diagnoses with O.R. Procedures with MCC
DRG 818
Other Antepartum Diagnoses with O.R. Procedures with CC
DRG 819
Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
DRG 831
Other Antepartum Diagnoses without O.R. Procedures with MCC
DRG 832
Other Antepartum Diagnoses without O.R. Procedures with CC
DRG 833
Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Obstructed labor due to other abnormalities of fetus.

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