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    OpenPayerBilling CodesMaternal care related to the fetus and amniotic cavity and possible delivery problemsICD-10-CM o33-maternal-care-for-disproportion
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    ICD-10-CM Code For Maternal Care For Disproportion: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O33 includes diagnoses related to maternal pelvic disproportion and mechanical difficulties arising from the relationship between the maternal pelvis and the fetus, such as disproportion due to fetal size, presentation, or pelvic structure. These ICD-10-CM diagnosis codes are used to document obstetric scenarios where disproportion may affect labor progression, delivery method, or management decisions, capturing clinical complexity and any related complications. Accurate coding within the ICD-10-CM O33 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM O33: Maternal Care For Disproportion Overview

    This group includes diagnoses related to maternal care for disproportion between the maternal pelvis and the fetus during pregnancy or delivery, affecting the maternal-fetal unit. These conditions target the obstetric and musculoskeletal considerations that can complicate labor and delivery. Accurate coding matters because it reflects clinical complexity and supports correct reimbursement for obstetric services.

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    When to Use

    Use a code from this group when clinical documentation indicates that maternal-fetal disproportion is present or suspected and affects management of the pregnancy or delivery. These codes apply when disproportion contributes to labor dystocia, need for altered delivery planning, or other obstetric interventions.

    ICD-10-CM Codes

    40 rows

    ICD-10-CM CodeDescription
    O33.0Maternal care for disproportion due to deformity of maternal pelvic bones
    O33.1Maternal care for disproportion due to generally contracted pelvis
    O33.2Maternal care for disproportion due to inlet contraction of pelvis
    O33.3XX0Maternal care for disproportion due to outlet contraction of pelvis, not applicable or unspecified
    O33.3XX1Maternal care for disproportion due to outlet contraction of pelvis, fetus 1
    O33.3XX2Maternal care for disproportion due to outlet contraction of pelvis, fetus 2
    O33.3XX3Maternal care for disproportion due to outlet contraction of pelvis, fetus 3
    O33.3XX4Maternal care for disproportion due to outlet contraction of pelvis, fetus 4
    O33.3XX5Maternal care for disproportion due to outlet contraction of pelvis, fetus 5
    O33.3XX9Maternal care for disproportion due to outlet contraction of pelvis, other fetus
    O33.4XX0Maternal care for disproportion of mixed maternal and fetal origin, not applicable or unspecified
    O33.4XX1Maternal care for disproportion of mixed maternal and fetal origin, fetus 1
    O33.4XX2Maternal care for disproportion of mixed maternal and fetal origin, fetus 2
    O33.4XX3Maternal care for disproportion of mixed maternal and fetal origin, fetus 3
    O33.4XX4Maternal care for disproportion of mixed maternal and fetal origin, fetus 4
    O33.4XX5Maternal care for disproportion of mixed maternal and fetal origin, fetus 5
    O33.4XX9Maternal care for disproportion of mixed maternal and fetal origin, other fetus
    O33.5XX0Maternal care for disproportion due to unusually large fetus, not applicable or unspecified
    O33.5XX1Maternal care for disproportion due to unusually large fetus, fetus 1
    O33.5XX2Maternal care for disproportion due to unusually large fetus, fetus 2

    Showing 1–20 of 40

    DRG Codes

    6 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

    Typical Clinical Scenarios

    • A 28-year-old primigravida at 39 weeks gestation presents in active labor with arrest of descent and maternal pelvic disproportion on vaginal exam; labor is prolonged with ineffective fetal descent and the obstetric team documents suspected cephalopelvic disproportion as the primary reason for failed progress, prompting operative delivery planning. Typical codes: O33.3XX0, O33.3XX3.
    • A 35-year-old multiparous pregnant woman with a known history of uterine malformation and previous cesarean delivery is evaluated antenatally for suspected fetal-pelvic size mismatch; ultrasound and pelvimetry suggest that the fetal size is large relative to the maternal pelvis, and the care plan flags anticipated delivery difficulty and need for delivery mode counseling. Typical codes: O33.4XX0, O33.4XX9.
    • An emergent presentation to triage with prolonged second stage of labor complicated by fetal distress requiring urgent operative delivery; intraoperative notes describe disproportion between fetal head size and maternal pelvis identified during attempted vaginal delivery, and the patient has an intrapartum complication requiring close postpartum monitoring. Typical codes: O33.5XX3, O33.5XX9.

    Related Codes

    O30-MULTIPLE-GESTATION-PREGNANCY

    ICD-10-CM Code For Multiple Gestation: Group Overview

    O31-COMPLICATIONS-SPECIFIC-TO-MULTIPLE-GESTATION

    ICD-10-CM Code For Complications Specific To Multiple Gestation: Group Overview

    O32-MALPRESENTATION-OF-FETUS

    ICD-10-CM Code For Maternal Care For Malpresentation Of Fetus: Group Overview

    O34-ABNORMALITY-OF-PELVIC-ORGANS

    ICD-10-CM Code For Maternal Care For Abnormality Of Pelvic Organs: Group Overview

    O35-MATERNAL-CARE-FOR-FETAL-ABNORMALITY

    ICD-10-CM Code For Maternal Care For Known Or Suspected Fetal Abnormality And Damage: Group Overview

    O36-MATERNAL-CARE-OTHER-FETAL-PROBLEMS

    ICD-10-CM Code For Maternal Care For Other Fetal Problems: Group Overview

    O40-POLYHYDRAMNIOS

    ICD-10-CM Code For Polyhydramnios: Group Overview

    O41-OTHER-DISORDERS-OF-AMNIOTIC-FLUID

    ICD-10-CM Code For Other Disorders Of Amniotic Fluid And Membranes: Group Overview

    O42-PREMATURE-RUPTURE-OF-MEMBRANES

    ICD-10-CM Code For Premature Rupture Of Membranes: Group Overview

    O43-PLACENTAL-DISORDERS

    ICD-10-CM Code For Placental Disorders: Group Overview

    Showing 1–10 of 15

    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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