E871 - Low sodium levels in the blood (hyponatremia)

International Classification of Diseases

Last updated: 3/24/2026

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

This code indicates a condition where there are abnormally low levels of sodium in your blood, combined with low concentration of particles dissolved in your blood (hypo-osmolality). Sodium is an important electrolyte that helps regulate water balance in your body. When sodium levels drop too low, it can affect how your cells function and may cause symptoms like nausea, headache, confusion, or in severe cases, seizures or coma.

Additional Information

Treatment depends on the underlying cause and severity. May require immediate medical attention if severe. Common causes include certain medications, heart failure, kidney disease, or excessive water intake.

Category

Endocrine, nutritional and metabolic diseases

Medical Specialty

Endocrinology, Internal Medicine, Emergency Medicine

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Blood tests showing low sodium levels
  • Clinical symptoms consistent with hyponatremia

What to Expect After

  • Regular monitoring of electrolyte levels
  • Fluid restriction if recommended
  • Treatment of underlying cause
  • Follow-up with healthcare provider

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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