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    v1.0.28
    OpenPayerBilling CodesComplications of labor and deliveryICD-10-CM o66-other-obstructed-labor
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    ICD-10-CM Code For Other Obstructed Labor: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O66 includes obstructed labor from causes other than pelvic disproportion or malpresentation, such as impaction of the fetal head, failed attempt at assisted delivery, or other specified mechanical obstructions encountered during labor. These ICD-10-CM diagnosis codes are used to document intrapartum complications that reflect the cause of obstruction, any associated procedures or interventions, and the clinical complexity of the delivery. Accurate coding within the ICD-10-CM O66 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM O66: Other Obstructed Labor Overview

    This group includes diagnoses for labor that is obstructed by causes other than malpresentation or disproportion, affecting the maternal pelvic region and the process of childbirth. Accurate coding captures the specific cause of obstruction and associated clinical complexity, which is important for complete clinical documentation and appropriate reimbursement. These conditions involve obstetric complications during labor that may require additional interventions to ensure maternal and fetal safety.

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    When to Use

    Use a code from this group when documentation records an obstructed labor due to causes such as impaction of the fetal head, failed assisted delivery, or other specified mechanical blockages. Select the most specific code reflecting the cause of obstruction and any documented procedures or complications during labor.

    ICD-10-CM Codes

    10 rows

    ICD-10-CM CodeDescription
    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
    O66.40Failed trial of labor, unspecified
    O66.41Failed attempted vaginal birth after previous cesarean delivery
    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

    DRG Codes

    7 rows

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

    • A term pregnant patient in active labor arrives to the labor and delivery triage with strong contractions but fetal descent is arrested despite adequate uterine contractions; the fetus cannot be delivered vaginally due to malposition preventing engagement, prompting operative delivery or cesarean section. A code from this group is assigned for obstructed labor due to malposition or malpresentation causing failure of descent. Typical codes: O66.0, O66.1
    • A multiparous patient presents in the second stage of labor with prolonged maternal exhaustion and ineffective pushing after epidural analgesia, and the fetus shows signs of distress on continuous monitoring; assisted vaginal delivery is attempted but an obstructed labor diagnosis is documented because maternal effort and pelvic outlet issues prevented timely delivery. Typical codes: O66.5, O66.6
    • A woman in labor develops sudden complete shoulder dystocia during vaginal delivery with successful maneuvers but with a retained placenta and postpartum hemorrhage; the delivery course is complicated by mechanical obstruction requiring specific obstetric interventions, so an obstructed labor code is used to capture the complication. Typical codes: O66.3, O66.8

    Related Codes

    O60-PRETERM-LABOR

    ICD-10-CM Code For Preterm Labor: Group Overview

    O61-FAILED-INDUCTION-OF-LABOR

    ICD-10-CM Code For Failed Induction Of Labor: Group Overview

    O62-ABNORMALITIES-OF-FORCES-OF-LABOR

    ICD-10-CM Code For Abnormalities Of Forces Of Labor: Group Overview

    O63-LONG-LABOR-CONDITIONS

    ICD-10-CM Code For Long Labor: Group Overview

    O64-OBSTRUCTED-LABOR-MALPOSITION-MALPRESENTATION

    ICD-10-CM Code For Obstructed Labor Due To Malposition And Malpresentation Of Fetus: Group Overview

    O65-OBSTRUCTED-LABOR-MATERNAL-PELVIS

    ICD-10-CM Code For Obstructed Labor Due To Maternal Pelvic Abnormality: Group Overview

    O67-LABOR-AND-DELIVERY-HEMORRHAGE

    ICD-10-CM Code For Labor And Delivery Complicated By Intrapartum Hemorrhage: Group Overview

    O68-LABOR-AND-DELIVERY-COMPLICATED-BY-ABNORMALITY-OF-FETAL-ACID-BASE

    ICD-10-CM Code For Labor And Delivery Complicated By Abnormality Of Fetal Acid Base Balance: Group Overview

    O69-UMBILICAL-CORD-COMPLICATIONS

    ICD-10-CM Code For Labor And Delivery Complicated By Umbilical Cord Complications: Group Overview

    O70-PERINEAL-LACERATION-DURING-DELIVERY

    ICD-10-CM Code For Perineal Laceration During Delivery: Group Overview

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    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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