ICD-10 Guide

Hypocalcemia

ICD-10 Coding for Hypocalcemia(E83.51, E20.810)

PRIMARY SPECIALTYNephrology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Hypocalcemia?

Essential facts and insights about Hypocalcemia

Key Clinical Considerations:

Muscle cramps or spasms
Numbness or tingling in fingers and toes
Severe cases may present with seizures or cardiac arrhythmias
Serum calcium levels < 8.5 mg/dL
Low parathyroid hormone (PTH) levels in some cases

Clinical Information

Clinical Criteria & Documentation Requirements

Patient history including symptoms and duration
Laboratory results showing serum calcium levels
Assessment of underlying causes (e.g., renal failure, vitamin D deficiency)
Specific coding terminology such as 'hypocalcemia' and related conditions
Documentation of any treatments administered

Coding Guidelines

Usage Guidelines & Examples

Usage guidelines: Use E83.51 for hypocalcemia; consider additional codes for underlying conditions.
Common errors: Misclassifying hypocalcemia as a symptom rather than a diagnosis.

Code Exclusions

Important Exclusions

Excluded conditions: Hyperparathyroidism, primary hyperaldosteronism.
Alternative codes: Consider E83.52 for hypoparathyroidism-related hypocalcemia.

Specialty Focus

Primary Specialty

Nephrology

Specialty Applications

Patient populations: Individuals with chronic kidney disease, post-surgical patients, and those with malabsorption syndromes.
Clinical settings: Nephrology clinics, emergency departments, and inpatient care.

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

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

Documentation requirements?

Include patient history, lab results, and treatment plans.

Billing considerations?

Ensure accurate coding to reflect the severity and underlying causes.

Hypocalcemia

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?

Hypocalcemia

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?