ICD-10-CM Code For Eclampsia: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O15 includes diagnoses of eclampsia, which are seizures or convulsions occurring in pregnancy, labor, delivery, or the postpartum period typically associated with preeclampsia and severe gestational hypertension. These ICD-10-CM diagnosis codes are used to document maternal seizures related to hypertensive disorders of pregnancy, capturing severity, timing, and maternal neurologic involvement. Accurate coding within the ICD-10-CM O15 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM O15: Eclampsia Overview

This group includes conditions characterized by new-onset convulsions or seizures in pregnancy, childbirth, or the puerperium that are associated with preeclampsia or hypertensive disorders. These diagnoses target the nervous system complications arising from severe hypertensive disease of pregnancy. Accurate coding matters for reimbursement because it captures severity, guides appropriate DRG assignment, and supports clinically complete claims.

When to Use

Assign a code from this group when a pregnant or postpartum patient experiences new-onset seizures attributable to preeclampsia or hypertensive disorders of pregnancy. Use these codes to indicate the presence of maternal neurologic complications related to hypertension and to document timing relative to pregnancy, labor, delivery, or the postpartum period.

ICD-10-CM Codes

6 rows

ICD-10-CM Code	Description
O15.00	Eclampsia complicating pregnancy, unspecified trimester
O15.02	Eclampsia complicating pregnancy, second trimester
O15.03	Eclampsia complicating pregnancy, third trimester
O15.1	Eclampsia complicating labor
O15.2	Eclampsia complicating the puerperium
O15.9	Eclampsia, unspecified as to time period

DRG Codes

8 rows

DRG Code	Description
769	Postpartum and Post Abortion Diagnoses with O.R. Procedures
776	Postpartum and Post Abortion Diagnoses without O.R. Procedures
817	Other Antepartum Diagnoses with O.R. Procedures with MCC
818	Other Antepartum Diagnoses with O.R. Procedures with CC
819	Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
831	Other Antepartum Diagnoses without O.R. Procedures with MCC
832	Other Antepartum Diagnoses without O.R. Procedures with CC
833	Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

Typical Clinical Scenarios

A 28-year-old primigravida at 36 weeks’ gestation presents to the emergency department with new-onset generalized tonic-clonic seizures preceded by severe headache and visual changes. Blood pressure is markedly elevated and urinalysis shows proteinuria; seizures are attributed to pregnancy-related hypertensive crisis with eclampsia, requiring urgent stabilization and delivery planning. Typical codes: O15.1, O15.9
A 34-year-old postpartum patient on day 2 after cesarean delivery develops recurrent seizures despite antihypertensive therapy; she has persistent severe hypertension and proteinuria documented during the antepartum period. The seizures represent a puerperal complication of preexisting preeclampsia that progressed to eclampsia and require inpatient management for seizure control and blood pressure stabilization. Typical codes: O15.2, O15.9
A 22-year-old woman at 30 weeks’ gestation with known chronic hypertension presents acutely with status epilepticus and marked peripheral edema; she had intermittent prenatal care and now shows sudden worsening of blood pressure and proteinuria consistent with superimposed preeclampsia complicated by eclampsia. Because seizures occur in the setting of hypertensive disorder of pregnancy requiring emergent obstetric and neurologic care, this group of codes is assigned. Typical codes: O15.00, O15.03

ICD-10-CM Code For Pre-existing Hypertension Complicating Pregnancy Childbirth And The Puerperium: Group Overview

O11-PRE-EXISTING-HYPERTENSION-WITH-PRE-ECLAMPSIA

ICD-10-CM Code For Pre Existing Hypertension With Pre Eclampsia: Group Overview

O12-GESTATIONAL-EDEMA-AND-PROTEINURIA

ICD-10-CM Code For Gestational Edema And Proteinuria Without Hypertension: Group Overview

O13-GESTATIONAL-HYPERTENSION-WITHOUT-PROTEINURIA

ICD-10-CM Code For Gestational Hypertension Without Significant Proteinuria: Group Overview

O14-PRE-ECLAMPSIA

ICD-10-CM Code For Pre Eclampsia: Group Overview

O16-UNSPECIFIED-MATERNAL-HYPERTENSION

ICD-10-CM Code For Unspecified Maternal Hypertension: Group Overview

Frequently Asked Questions

References

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.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.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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When to Use

ICD-10-CM Codes

6 rows

ICD-10-CM Code	Description
O15.00	Eclampsia complicating pregnancy, unspecified trimester
O15.02	Eclampsia complicating pregnancy, second trimester
O15.03	Eclampsia complicating pregnancy, third trimester
O15.1	Eclampsia complicating labor
O15.2	Eclampsia complicating the puerperium
O15.9	Eclampsia, unspecified as to time period

DRG Codes

8 rows

DRG Code	Description
769	Postpartum and Post Abortion Diagnoses with O.R. Procedures
776	Postpartum and Post Abortion Diagnoses without O.R. Procedures
817	Other Antepartum Diagnoses with O.R. Procedures with MCC
818	Other Antepartum Diagnoses with O.R. Procedures with CC
819	Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
831	Other Antepartum Diagnoses without O.R. Procedures with MCC
832	Other Antepartum Diagnoses without O.R. Procedures with CC
833	Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

Typical Clinical Scenarios

A 28-year-old primigravida at 36 weeks’ gestation presents to the emergency department with new-onset generalized tonic-clonic seizures preceded by severe headache and visual changes. Blood pressure is markedly elevated and urinalysis shows proteinuria; seizures are attributed to pregnancy-related hypertensive crisis with eclampsia, requiring urgent stabilization and delivery planning. Typical codes: O15.1, O15.9
A 34-year-old postpartum patient on day 2 after cesarean delivery develops recurrent seizures despite antihypertensive therapy; she has persistent severe hypertension and proteinuria documented during the antepartum period. The seizures represent a puerperal complication of preexisting preeclampsia that progressed to eclampsia and require inpatient management for seizure control and blood pressure stabilization. Typical codes: O15.2, O15.9
A 22-year-old woman at 30 weeks’ gestation with known chronic hypertension presents acutely with status epilepticus and marked peripheral edema; she had intermittent prenatal care and now shows sudden worsening of blood pressure and proteinuria consistent with superimposed preeclampsia complicated by eclampsia. Because seizures occur in the setting of hypertensive disorder of pregnancy requiring emergent obstetric and neurologic care, this group of codes is assigned. Typical codes: O15.00, O15.03

ICD-10-CM Code For Pre-existing Hypertension Complicating Pregnancy Childbirth And The Puerperium: Group Overview

O11-PRE-EXISTING-HYPERTENSION-WITH-PRE-ECLAMPSIA

ICD-10-CM Code For Pre Existing Hypertension With Pre Eclampsia: Group Overview

O12-GESTATIONAL-EDEMA-AND-PROTEINURIA

ICD-10-CM Code For Gestational Edema And Proteinuria Without Hypertension: Group Overview

O13-GESTATIONAL-HYPERTENSION-WITHOUT-PROTEINURIA

ICD-10-CM Code For Gestational Hypertension Without Significant Proteinuria: Group Overview

O14-PRE-ECLAMPSIA

ICD-10-CM Code For Pre Eclampsia: Group Overview

O16-UNSPECIFIED-MATERNAL-HYPERTENSION

ICD-10-CM Code For Unspecified Maternal Hypertension: Group Overview

Frequently Asked Questions

References

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.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.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.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Eclampsia: Group Overview

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ICD-10-CM O15: Eclampsia Overview

ICD-10-CM Code For Eclampsia: Group Overview

Sign up for ICD-10-CM Code For Eclampsia: Group Overview policy alerts

ICD-10-CM O15: Eclampsia Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Eclampsia: Group Overview

Sign up for ICD-10-CM Code For Eclampsia: Group Overview policy alerts

ICD-10-CM O15: Eclampsia Overview

ICD-10-CM Code For Eclampsia: Group Overview

Sign up for ICD-10-CM Code For Eclampsia: Group Overview policy alerts

ICD-10-CM O15: Eclampsia Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes are included in the O15 eclampsia group?

What clinical scenario does ICD-10-CM O15 describe?

How does accurate coding in O15 affect reimbursement and claims?

Which DRGs are related to O15 eclampsia diagnoses?

How do the individual O15 codes capture timing and severity?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes are included in the O15 eclampsia group?

What clinical scenario does ICD-10-CM O15 describe?

How does accurate coding in O15 affect reimbursement and claims?

Which DRGs are related to O15 eclampsia diagnoses?

How do the individual O15 codes capture timing and severity?

References