2024 ICD-10-CM Diagnosis Code E87.0

Hyperosmolality and hypernatremia

ICD-10-CM Code:
ICD-10 Code for:
Hyperosmolality and hypernatremia
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Endocrine, nutritional and metabolic diseases
    • Metabolic disorders
      • Other disorders of fluid, electrolyte and acid-base balance

E87.0 is a billable diagnosis code used to specify a medical diagnosis of hyperosmolality and hypernatremia. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute hypernatremia
  • Adipsia
  • Central nervous system disorder of water regulation
  • Cerebral hypernatremia
  • Chronic hypernatremia
  • Chronic hypernatremia
  • Essential hypernatremia
  • Excessive sodium intake
  • Hypernatremia
  • Hypernatremia
  • Hypernatremia
  • Hypernatremic dehydration
  • Hypernatremic dehydration
  • Hyperosmolality
  • Hyperosmolality and or hypernatremia
  • Hyperosmolality due to uncontrolled type 1 diabetes mellitus
  • Hyperosmolality with hypernatremia
  • Hyperosmolar coma due to diabetes mellitus
  • Hyperosmolar coma due to type 1 diabetes mellitus
  • Hyperosmolarity
  • Hyperosmolarity due to type 1 diabetes mellitus
  • Hypothalamic adipsic hypernatremia syndrome
  • Microcephalus, brain defect, spasticity, hypernatremia syndrome
  • Salt overload
  • Sodium retention
  • Thirst finding

Clinical Classification

Clinical Information

  • Hypernatremia

    excessive amount of sodium in the blood. (dorland, 27th ed)
  • Hypernatremic Dehydration

    dehydration resulting from abnormally high levels of sodium in the blood. infants and individuals that are intubated are at highest risk.
  • Grade 1 Hypernatremia, CTCAE|Grade 1 Hypernatremia

    >uln-150 mmol/l
  • Grade 2 Hypernatremia, CTCAE|Grade 2 Hypernatremia

    >150-155 mmol/l; intervention initiated
  • Grade 3 Hypernatremia, CTCAE|Grade 3 Hypernatremia

    >155-160 mmol/l; hospitalization indicated
  • Grade 4 Hypernatremia, CTCAE|Grade 4 Hypernatremia

    >160 mmol/l; life-threatening consequences
  • Grade 5 Hypernatremia, CTCAE|Grade 5 Hypernatremia

  • Hypernatremia

    higher than normal levels of sodium in the circulating blood.
  • Hypernatremia, CTCAE|Hypernatremia|Hypernatremia

    a disorder characterized by laboratory test results that indicate an elevation in the concentration of sodium in the blood.

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).

Convert E87.0 to ICD-9-CM

  • ICD-9-CM Code: 276.0 - Hyperosmolality

Patient Education

Fluid and Electrolyte Balance

Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help:

  • Balance the amount of water in your body
  • Balance your body's acid/base (pH) level
  • Move nutrients into your cells
  • Move wastes out of your cells
  • Make sure that your nerves, muscles, the heart, and the brain work the way they should

Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.

The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.

Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.

[Learn More in MedlinePlus]


Table salt is a combination of two minerals - sodium and chloride Your body needs some sodium to work properly. It helps with the function of nerves and muscles. It also helps to keep the right balance of fluids in your body. Your kidneys control how much sodium is in your body. If you have too much and your kidneys can't get rid it, sodium builds up in your blood. This can lead to high blood pressure. High blood pressure can lead to other health problems.

Most people in the U.S. get more sodium in their diets than they need. A key to healthy eating is choosing foods low in sodium. The Dietary Guidelines recommend that most adults eat less than 2.3 grams per day. That equals about 1 teaspoon of table salt a day. Some people are more sensitive to the effects of salt than others and should eat less. This includes people who have high blood pressure, diabetes, or kidney problems, or are African American or over age 50. Reading food labels can help you see how much sodium is in prepared foods.

NIH: National Heart, Lung, and Blood Institute

[Learn More in MedlinePlus]

Code History

  • 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.


[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.