O33.9 Maternal care for disproportion, unspecified

The ICD-10-CM code for Maternal care for disproportion, unspecified is O33.9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O30-O48: Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)

Category O33

11 codes (10 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O33.9:

• Delivery (childbirth) (labor) › cesarean (for) › disproportion NOS
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › disproportion (due to)
• Delivery (childbirth) (labor) › cesarean (for) › cephalopelvic disproportion

Inclusion Terms

• Maternal care for disproportion due to cephalopelvic disproportion NOS
• Maternal care for disproportion due to fetopelvic disproportion NOS

U.S. Hospital Utilization

• An estimated 13,060 U.S. inpatient stays in 2023 included O33.9 among the documented diagnoses.
• 2,740 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)