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  6. 2026 ICD-10-CM Code O15.2

2026 ICD-10-CM Diagnosis Code O15.2

Eclampsia complicating the puerperium

ICD-10-CM Code:
O15.2
ICD-10 Code for:
Eclampsia complicating the puerperium
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

O15.2 is a billable diagnosis code used to specify a medical diagnosis of eclampsia complicating the puerperium. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

The code O15.2 is applicable to female patients aged 12 through 55 years inclusive. It is clinically and virtually impossible to use this code on a non-female patient outside the stated age range.

Code Classification

  • Pregnancy, childbirth and the puerperium
    O00-O9A
    • Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
      O10-O16
      • Eclampsia
        O15

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

  • Eclampsia
  • Eclampsia in puerperium
  • Puerperal convulsion

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Complications specified during the puerperium

CCSR Code: PRG027

Inpatient Default: N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.

Hypertension and hypertensive-related conditions complicating pregnancy; childbirth; and the puerperium

CCSR Code: PRG020

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Eclampsia

    onset of hyperreflexia; seizures; or coma in a previously diagnosed pre-eclamptic patient (pre-eclampsia).

  • Pre-Eclampsia

    a complication of pregnancy, characterized by a complex of symptoms including maternal hypertension and proteinuria with or without pathological edema. symptoms may range between mild and severe. pre-eclampsia usually occurs after the 20th week of gestation, but may develop before this time in the presence of trophoblastic disease.

  • Chronic Maternal Hypertension with Superimposed Preeclampsia|Pre-existing hypertension with pre-eclampsia, unspecified trimester

    chronic hypertension in association with preeclampsia.

  • Eclampsia

    a potentially life-threatening pregnancy-related disorder characterized by tonic-clonic seizures in association with hypertension after the twentieth week of gestation and up to six weeks postpartum and in the absence of other potential causes of seizures.

  • GAIA Insufficient Evidence for Diagnosis of Preeclampsia with Severe Features|Global Alignment of Immunization safety Assessment in pregnancy Insufficient Evidence for Diagnosis of Preeclampsia with Severe Features|Insufficient Evidence for Preeclampsia with Severe Features

    gaia insufficient evidence for diagnosis of preeclampsia with severe features is a pregnancy with a gestational age greater than or equal to 20 weeks and the inability to measure blood pressure.

  • GAIA Insufficient Evidence for Diagnosis of Preeclampsia|Global Alignment of Immunization safety Assessment in pregnancy Insufficient Evidence for Diagnosis of Preeclampsia|Insufficient Evidence for Preeclampsia

    gaia insufficient evidence for diagnosis of preeclampsia is defined as a pregnancy with gestational age greater than or equal to 20 weeks and either a) the inability to measure blood pressure or b) the inability to evaluate for proteinuria.

  • GAIA Level 1 Preeclampsia with Severe Features|Global Alignment of Immunization safety Assessment in pregnancy Level 1 Preeclampsia with Severe Features|Level 1 Preeclampsia with Severe Features

    gaia level 1 preeclampsia with severe features is defined by three criteria: first, the gestational age of the pregnancy must be greater than or equal to 20 weeks; second, a diagnosis of new onset maternal hypertension (systolic blood pressure greater than or equal to 140mmhg and/or diastolic blood pressure greater than or equal to 90mmhg) that is sustained on two measurements over a minimum of one hour); third, the presence of one or more of the following requirements: a) systolic blood pressure greater than or equal to 160mmhg and/or diastolic blood pressure greater than or equal to 110mmhg, which is confirmed after only minutes; b) development of severe, persistent headache; c) development of visual changes; d) eclampsia; e) new onset thrombocytopenia (platelets less than 100,000/microliter); f) new onset unremitting epigastric pain; g) ast and alt elevated to twice the upper limit of normal; h) evidence of liver capsular hematoma or liver rupture (diagnosed on clinical exam or with imaging); i) worsening renal function, as evidenced by serum creatinine level greater than 1.1 mg/dl, a doubling of the serum creatinine (absent other renal disease), or oliguria (less than 500 cc/24 hours); j) pulmonary edema (confirmed on either imaging with chest x-ray or on clinical exam).

  • GAIA Level 1 Preeclampsia|Global Alignment of Immunization safety Assessment in pregnancy Level 1 Preeclampsia|Level 1 Preeclampsia

    gaia level 1 preeclampsia is defined by three criteria: first, the gestational age of the pregnancy must be greater than or equal to 20 weeks; second, a diagnosis of new onset maternal hypertension (systolic blood pressure greater than or equal to 140mmhg and/or diastolic blood pressure greater than or equal to 90mmhg) that is sustained on two measurements over a minimum of one hour; third, a diagnosis of new onset proteinuria that is a level one diagnostic certainty (proteinuria diagnosed with greater than or equal to 300 mg of protein during 24 hour urine collection or greater than or equal to 0.3 for spot protein:creatinine ratio.)

  • GAIA Level 2 Preeclampsia with Severe Features|Global Alignment of Immunization safety Assessment in pregnancy Level 2 Preeclampsia with Severe Features|Level 2 Preeclampsia with Severe Features

    gaia level 2 preeclampsia with severe features is defined by three criteria: first, the gestational age of the pregnancy must be greater than or equal to 20 weeks; second, a diagnosis of new onset maternal hypertension (systolic blood pressure greater than or equal to 140mmhg and/or diastolic blood pressure greater than or equal to 90mmhg) that is sustained on two measurements for a minimum of one hour; third, the diagnosis of new onset nausea and vomiting.

  • GAIA Level 2 Preeclampsia|Global Alignment of Immunization safety Assessment in pregnancy Level 2 Preeclampsia|Level 2 Preeclampsia

    gaia level 2 preeclampsia is defined by three criteria: first, the gestational age of the pregnancy must be greater than or equal to 20 weeks; second, a diagnosis of new onset maternal hypertension (systolic blood pressure greater than or equal to 140mmhg and/or diastolic blood pressure greater than or equal to 90mmhg) that is sustained on two measurements for a minimum of one hour; third, a diagnosis of new onset proteinuria that is a level 2 diagnostic certainty (proteinuria diagnosed with greater than or equal to 1+ protein on urine dipstick).

  • GAIA Preeclampsia Level of Diagnostic Certainty Terminology|Global Alignment of Immunization safety Assessment in pregnancy Preeclampsia Level of Diagnostic Certainty Terminology

    a subset of terminology related to preeclampsia, developed by the global alignment of immunization safety assessment in pregnancy consortium to aid in monitoring and improving fetal and maternal outcomes.

  • GAIA Preeclampsia Level of Diagnostic Certainty|Global Alignment of Immunization safety Assessment in pregnancy Preeclampsia Level of Diagnostic Certainty|Preeclampsia Level of Diagnostic Certainty

    a classification of maternal and fetal outcomes relating to preeclampsia, developed by the global alignment of immunization safety assessment in pregnancy, based on the extent to which the diagnosis has been confirmed.

  • Preeclampsia

    a systolic blood pressure of 140 mmhg or higher, or a diastolic blood pressure of 90 mmhg or higher on two occasions at least 4 hours apart (or greater than or equal to 160/110 mmhg within a short interval) after 20 weeks of gestation in a woman with previously normal blood pressure. it may present with proteinuria but if not, it may be associated with thrombocytopenia, impaired liver function, progressive renal insufficiency, pulmonary edema, or new-onset cerebral or visual disturbances.

  • Pre-Existing Hypertension with Pre-Eclampsia, Complicating Childbirth|Pre-existing hypertension with pre-eclampsia, complicating childbirth

    evidence of pre-existing hypertension with pre-eclampsia, complicating childbirth.

  • Pre-Existing Hypertension with Pre-Eclampsia, Complicating the Puerperium|Pre-existing hypertension with pre-eclampsia, complicating the puerperium

    evidence of pre-existing hypertension with pre-eclampsia, complicating the puerperium.

  • Pre-Existing Hypertension with Pre-Eclampsia, First Trimester|Pre-existing hypertension with pre-eclampsia, first trimester

    evidence of pre-existing hypertension with pre-eclampsia in the first trimester.

  • Pre-Existing Hypertension with Pre-Eclampsia, Second Trimester|Pre-existing hypertension with pre-eclampsia, second trimester

    evidence of pre-existing hypertension with pre-eclampsia in the second trimester.

  • Pre-Existing Hypertension with Pre-Eclampsia, Third Trimester|Pre-existing hypertension with pre-eclampsia, third trimester

    evidence of pre-existing hypertension with pre-eclampsia in the third trimester.

  • Severe Preeclampsia|Preeclampsia with Severe Features|Preeclampsia with Severe Features

    preeclampsia with a systolic blood pressure of 160 mmhg or higher, or a diastolic blood pressure of 110 mmhg or higher on two occasions at least 4 hours apart while on bedrest. it is associated with thrombocytopenia (platelets less than 100,000 per microliter), impaired liver function (twice normal elevation of hepatic transaminases; severe, persistent right upper quadrant or epigastric pain), progressive renal insufficiency (serum creatinine greater than 1.1 mg/dl or doubling of baseline in the absence of other renal disease), pulmonary edema, or new-onset cerebral or visual disturbances.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Index of External Cause of Injuries

References found for this diagnosis code in the External Cause of Injuries Index:

    • Eclampsia, eclamptic(coma) (convulsions) (delirium) (with hypertension) NEC
      • complicating
        • postpartum
    • Eclampsia, eclamptic(coma) (convulsions) (delirium) (with hypertension) NEC
      • complicating
        • puerperium
    • Puerperal, puerperium(complicated by, complications)
      • eclampsia (with pre-existing hypertension)
    • Puerperal, puerperium(complicated by, complications)
      • toxemia (eclamptic) (pre-eclamptic) (with convulsions)

Code Edits

The Medicare Code Editor (MCE) detects errors and inconsistencies in ICD-10-CM diagnosis coding that can affect Medicare claim validity. These Medicare code edits help medical coders and billing professionals determine when a diagnosis code is not appropriate as a principal diagnosis, does not meet coverage criteria. Use this list to verify whether a code is valid for Medicare billing and to avoid claim rejections or denials due to diagnosis coding issues.

Maternity diagnoses

The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

View Edit

Convert O15.2 to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Mild/NOS preeclamp-p/p

ICD-9-CM: 642.44

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

View Conversion

Eclampsia-postpartum

ICD-9-CM: 642.64

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

View Conversion

Patient Education


High Blood Pressure in Pregnancy

What is high blood pressure in pregnancy?

Blood pressure is the force of your blood pushing against the walls of your arteries. Your arteries are blood vessels that carry blood from your heart to other parts of your body. High blood pressure, or hypertension, is blood pressure that is higher than normal. Having high blood pressure can put you at risk for other health problems, such as heart disease, heart attack, and stroke.

During pregnancy, high blood pressure can cause problems for you and your baby. To keep you and your baby healthy, it's important to get treatment for high blood pressure before, during, and after pregnancy.

What are the types of high blood pressure in pregnancy?

There are different types of high blood pressure in pregnancy:

  • Gestational hypertension is high blood pressure that you develop while you are pregnant. It starts after you are 20 weeks pregnant. You usually don't have any other symptoms. In many cases, it does not harm you or your baby, and it goes away within 12 weeks after childbirth. But it does raise your risk of high blood pressure in the future. If it becomes severe, it can lead to a preterm birth or your baby having a low birth weight. Some women with gestational hypertension do go on to develop preeclampsia, a more serious type of high blood pressure in pregnancy.
  • Chronic hypertension is high blood pressure that starts before the 20th week of pregnancy or before you became pregnant. Some people may have had it long before becoming pregnant but didn't know it until they got their blood pressure checked at their prenatal visit. Sometimes chronic hypertension can also lead to preeclampsia.
  • Preeclampsia is a sudden increase in blood pressure after the 20th week of pregnancy. It usually happens in the last trimester. Preeclampsia also often includes signs of damage to some of your organs, such as your liver or kidneys. The signs may include protein in the urine (pee) and very high blood pressure. Preeclampsia can be serious or even life-threatening for both you and your baby.
    • If preeclampsia becomes severe enough to affect your brain function and causes seizures or a coma, it is called eclampsia.
    • In rare cases, preeclampsia symptoms may not start until after delivery. This is called postpartum preeclampsia. If this type of preeclampsia becomes more severe and causes a seizure, it is known as postpartum eclampsia.
    • When a person with preeclampsia or eclampsia has damage to the liver and blood cells, it's called HELLP syndrome. It is rare, but very serious.

Who is more likely to develop high blood pressure in pregnancy?

You are more likely to develop high blood pressure in pregnancy if you:

  • Had chronic high blood pressure or chronic kidney disease before pregnancy
  • Had high blood pressure or preeclampsia in a previous pregnancy
  • Have obesity
  • Are under age 20 or over age 40
  • Are pregnant with more than one baby
  • Are African American
  • Have a family history of high blood pressure in pregnancy
  • Have certain health conditions, such as diabetes or lupus

What are the symptoms of high blood pressure in pregnancy?

High blood pressure usually has no symptoms. People usually find out they have high blood pressure when their health care provider measures their blood pressure.

Preeclampsia can cause other symptoms, including:

  • Too much protein in your urine (called proteinuria).
  • Swelling (edema) in your face and hands. Your feet may also swell, but many women have swollen feet during pregnancy. So swollen feet by themselves may not be a sign of a problem.
  • A headache that does not go away.
  • Vision problems, including blurred vision or seeing spots.
  • Pain in your upper right abdomen (belly).
  • Trouble breathing.

Eclampsia can also cause seizures, nausea and/or vomiting, and low urine output.

If you go on to develop HELLP syndrome, you may also have bleeding or bruising easily, extreme fatigue, and liver failure.

What problems can high blood pressure in pregnancy cause?

High blood pressure in pregnancy can lead to complications such as:

  • Placental abruption, where the placenta (the organ that brings oxygen and nutrients to the baby) separates from the uterus (the place where a baby grows during pregnancy)
  • Poor fetal growth, caused by a lack of nutrients and oxygen
  • Preterm birth
  • Your baby having a low birth weight
  • Damage to your kidneys, liver, brain, and other organ and blood systems
  • A higher risk of heart disease for you

How is high blood pressure in pregnancy diagnosed?

Your provider will check your blood pressure and urine at each prenatal visit. If your blood pressure reading is high (140/90 or higher), especially after the 20th week of pregnancy, your provider will likely want to order some tests. These may include blood tests and other lab tests, such as a test to look for extra protein in your urine.

What are the treatments for high blood pressure in pregnancy?

If you have high blood pressure, you and your baby will be closely monitored to lower the chance of complications. You may need to:

  • Check your blood pressure at home.
  • Keep track of how many times you feel the baby kicking each day.
  • Adjust your physical activity. Talk to your provider about what level of physical activity is right for you.
  • Take medicine to control your blood pressure. Talk to your provider about which medicines are safe for your baby.
  • Take aspirin in the second trimester, if you are at risk of preeclampsia and your provider recommends aspirin.
  • Visit your provider more often to monitor your condition and your baby's growth rate and heart rate.

If you have eclampsia, HELLP syndrome, or a severe case of preeclampsia, you will most likely need to go to the hospital. Treatment often includes medicines. Your provider may also recommend delivering the baby early. They will make the decision based on:

  • How severe the condition is
  • The possible risks to you and your baby
  • How far along the pregnancy is

The goal is to lower the risks to you while giving your baby as much time as possible to mature before delivery.

The symptoms of preeclampsia can last after delivery, but they usually go away within 6 weeks.


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.