ICD-10 Guide

Mounjaro

ICD-10 Coding for Type 2 Diabetes Mellitus with Mounjaro Treatment(E11.9, Z79.85)

PRIMARY SPECIALTYEndocrinology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Mounjaro?

Essential facts and insights about Type 2 Diabetes Mellitus with Mounjaro Treatment

Key Clinical Considerations:

Weight loss of at least 5% of body weight
Improvement in glycemic control in patients with type 2 diabetes
Reduction in appetite and caloric intake

Clinical Information

Clinical Criteria & Documentation Requirements

Patient's weight and BMI measurements
History of diabetes management and treatment
Evidence of lifestyle modifications and adherence

Coding Guidelines

Usage Guidelines & Examples

Ensure correct coding for diabetes and obesity to avoid denials.
Common errors include using outdated codes.

Code Exclusions

Important Exclusions

Type 1 diabetes
Pregnancy-related diabetes
Other weight loss medications

Specialty Focus

Primary Specialty

Endocrinology

Specialty Applications

Adults with type 2 diabetes and obesity
Endocrinology clinics and weight management programs

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, treatment plans, and outcomes.

Billing considerations?

Verify insurance coverage for weight loss medications and diabetes management.

Mounjaro

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?

Mounjaro

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?