ICD-10-CM Code E86.0 – Dehydration

Code: E86.0 Type: ICD-10-CM (Diagnosis) Status: Active Effective: FY2016-2026

What does ICD-10-CM code E86.0 mean?

E86.0 represents Dehydration. This code falls under Chapter 4 (Endocrine, Nutritional and Metabolic Diseases) and is used for documentation, reporting, and billing of this metabolic condition. Coders frequently reference this code as dehydration icd 10, mild dehydration icd 10, dehydration, or Mild or Severe Dehydration.

Depending on the clinical diagnosis, management may involve carboxymethylcellulose, dihydroergotamine, cevimeline. Refer to current clinical guidelines and provider documentation for treatment decisions.

Code category and hierarchy

  • Chapter: 4 – Endocrine, Nutritional and Metabolic Diseases (E00-E89)
  • Category: E86
  • Code: E86.0 – Dehydration

Guideline notes and coding considerations

Important Guideline Note

Assign E86.0 only when documentation clearly supports this diagnosis. Review the excludes notes and ensure no conflicts with other assigned codes.

  • Specificity: Assign E86.0 only when documentation supports this specific diagnosis.

Learn the underlying rules in the ICD-10 Coding Guidelines, Specificity Requirements.

Documentation tips (what coders should confirm)

  • Verify the clinical documentation supports the use of E86.0
  • Query the provider for greater specificity if clinical details suggest a more precise code

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Related ICD-10 codes

E03.9

Hypothyroidism, unspecified

E11.9

ICD-10-CM Code E11.9

E55.9

Vitamin D deficiency, unspecified

E78.00

Pure hypercholesterolemia, unspecified

Frequently Asked Questions

The ICD-10-CM code for dehydration is E86.0, which represents dehydration. This code is also commonly referenced as mild dehydration icd 10, dehydration, Mild or Severe Dehydration. Verify this code using the ICD Code Auditor to ensure guideline compliance.

Yes. E86.0 is an active ICD-10-CM diagnosis code used to classify dehydration for clinical documentation, reporting, and medical billing purposes.

Use the ICD Code Auditor to check E86.0 against official ICD-10-CM coding guidelines. The tool validates by fiscal year and patient gender to identify potential conflicts.

Documentation should clearly describe the clinical condition represented by E86.0 (Dehydration). Include relevant clinical findings, diagnostic test results, provider assessment, and the treatment plan. The diagnosis must be supported by the medical record and not based solely on lab results without clinical interpretation.

Sources

Reviewed by: Certified ICD-10 Coding & Risk Adjustment Specialist
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Validate E86.0 Against ICD 10 CM Coding Guidelines (FY2026)

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