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v1.0.0
ICD-10 Guide
DiagnosesProtein Calorie Malnutrition

Protein Calorie Malnutrition

ICD-10 Coding for Protein-Calorie Malnutrition(E43, E41, E44.0, E44.1, E46)

PRIMARY SPECIALTYInternal Medicine
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Protein Calorie Malnutrition?
Essential facts and insights about Protein-Calorie Malnutrition

Key Clinical Considerations:

  • Weight loss exceeding 10% of body weight over 6 months
  • Muscle wasting and weakness
  • Edema and signs of dehydration
  • Anemia and fatigue
  • Impaired immune function

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including dietary intake and weight changes
  • Physical examination findings related to malnutrition
  • Laboratory results indicating low protein levels or anemia
  • Assessment of functional status and comorbidities

Coding Guidelines

Usage Guidelines & Examples

  • Use E40 for kwashiorkor, E41 for marasmus, and E43 for unspecified malnutrition.
  • Common errors include using incorrect codes for severity or not documenting weight loss.

Code Exclusions

Important Exclusions

  • Excludes conditions like obesity or malnutrition due to specific diseases.
  • Alternative codes may include those for specific nutrient deficiencies.

Related ICD-10 Codes

Primary Codes
E40
Kwashiorkor
E41
Nutritional marasmus
E43
Unspecified protein-calorie malnutrition
Ancillary Codes
E64
Differential Codes
E41
E41
when severe muscle and fat loss is present without edema.
E43
E43
when severity is documented but not specified as marasmus.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Internal Medicine

Specialty Applications

  • Elderly patients, patients with chronic illnesses, and those with limited access to food.
  • Inpatient and outpatient settings, especially in geriatric and rehabilitation facilities.

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

What are the documentation requirements?

Document weight changes, dietary intake, and physical exam findings.

What are the billing considerations?

Ensure accurate coding based on clinical criteria and documentation to avoid denials.