O15.9 Eclampsia, unspecified as to time period

The ICD-10-CM code for Eclampsia, unspecified as to time period is O15.9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

O10-O16: Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)

Category O15

8 codes (6 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O15.9:

• Eclampsia, eclamptic (coma) (convulsions) (delirium) (with hypertension) NEC
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › convulsions (eclamptic) (uremic)

Inclusion Terms

• Eclampsia NOS

U.S. Hospital Utilization

• An estimated 60 U.S. inpatient stays in 2018 included O15.9 among the documented diagnoses.

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)