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v1.0.0
ICD-10 Guide
DiagnosesAbnormal Electrolytes

Abnormal Electrolytes

ICD-10 Coding for Abnormal Electrolytes(E87.0, E87.1, E87.5, E87.6)

PRIMARY SPECIALTYInternal Medicine
COMPLEXITYHigh
LAST UPDATED09/08/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Abnormal Electrolytes?
Essential facts and insights about Abnormal Electrolytes

Key Clinical Considerations:

  • Presence of symptoms such as fatigue, muscle weakness, nausea, or confusion
  • Abnormal results from blood tests indicating high or low levels of sodium, potassium, calcium, or other electrolytes

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed description of patient's symptoms and their duration
  • Specific results from diagnostic tests, including blood and urine tests
  • Treatment plan, including any medications prescribed and patient's response to treatment

Coding Guidelines

Usage Guidelines & Examples

  • E87.0 is used for hyperosmolality and hypernatremia, E87.1 for hypo-osmolality and hyponatremia
  • E87.5 is for hyperkalemia, and E87.6 is for hypokalemia. These codes are specific to the type of electrolyte imbalance

Code Exclusions

Important Exclusions

  • Conditions due to renal dialysis (E87.70, E87.71)
  • Transitory disorders of serum electrolytes in newborn (P74.-)

Related ICD-10 Codes

Primary Codes
E87.0
Hyperosmolality and hypernatremia
E87.1
Hypo-osmolality and hyponatremia
E87.5
Hyperkalemia
E87.6
Hypokalemia
Ancillary Codes
E87.0
Hyperosmolality and hypernatremia
E87.1
Hypoosmolality and hyponatremia
E87.5
Hyperkalemia
E87.6
Hypokalemia
E87.2
Acidosis
Differential Codes
E86.0
E86.0
when dehydration is the primary condition, not just a symptom of hypernatremia.
E22.2
E22.2
when hyponatremia is due to SIADH.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Internal Medicine

Specialty Applications

  • Patients with kidney disease, heart failure, or certain endocrine disorders
  • Patients who have been severely dehydrated or overhydrated

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Patient presents with [symptoms] indicative of a potential electrolyte imbalance.

Template 2

Blood tests confirm a diagnosis of [specific electrolyte imbalance], with [specific test results].

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

Can these codes be used for patients with diabetes?

Yes, if the patient's diabetes has led to an electrolyte imbalance.

When should this code be used?

These codes should be used when a patient has a confirmed diagnosis of an electrolyte imbalance, as indicated by symptoms and diagnostic tests.