O66.4
Non-billableFailed trial of labor
Failed trial of labor
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Child Codes (2)
Related Codes(8)
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
O66.5Attempted application of vacuum extractor and forceps
O66.6Obstructed labor due to other multiple fetuses
O66.8Other specified obstructed labor
O66.9Obstructed labor, unspecified
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(4)
Frequently Asked Questions
What is the ICD-10 code for failed trial of labor?
The ICD-10-CM code for failed trial of labor is O66.4. The full clinical description is "Failed trial of labor". O66.4 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code O66.4 mean?
ICD-10-CM code O66.4 represents “Failed trial of labor”. It is classified under Chapter 15: Pregnancy, Childbirth and the Puerperium and is a non-billable header code. Use a more specific child code for billing purposes.
Is O66.4 a billable code?
No, O66.4 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under O66.4.
What chapter is O66.4 in?
O66.4 is in Chapter 15: Pregnancy, Childbirth and the Puerperium (codes O00-O9A).
What codes cannot be used with O66.4?
O66.4 has Excludes1 notes indicating codes that cannot be used together with it, including: supervision of normal pregnancy (Z34.-).
What are the subcategories under O66.4?
O66.4 has 2 child codes, including: O66.40 (Failed trial of labor, unspecified), O66.41 (Failed attempt vaginal birth after previous cesarean del).
Are additional codes required with O66.4?
Yes, when using O66.4, also report: code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known..
What are the UMLS CUIs for O66.4?
O66.4 is linked to 1 UMLS Concept Unique Identifier: C0157223. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does O66.4 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like failed trial of labor affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of O66.4?
O66.4 maps to the ICD-11 code: JB0D.8 (Failed trial of labour, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.