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v1.0.0
ICD-10 Guide
DiagnosesDiabetes Type 2 Insulin Dependent

Diabetes Type 2 Insulin Dependent

ICD-10 Coding for Type 2 Diabetes Mellitus Insulin-Dependent(E11.9, E11.65, Z79.4)

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

Diagnosis Overview

What is Diabetes Type 2 Insulin Dependent?
Essential facts and insights about Type 2 Diabetes Mellitus Insulin-Dependent

Key Clinical Considerations:

  • Increased thirst and hunger
  • Frequent urination
  • Fatigue
  • Blurred vision
  • Key diagnostic tests: Fasting blood glucose ≥ 126 mg/dL, HbA1c ≥ 6.5%
  • Physical exam findings: Obesity, acanthosis nigricans

Clinical Information

Clinical Criteria & Documentation Requirements

  • Required documentation elements: Patient history, medication regimen, blood glucose monitoring records
  • Specific coding terminology: Insulin-dependent diabetes mellitus, Type 2 diabetes
  • Documentation examples: 'Patient is on insulin therapy for Type 2 diabetes with poor glycemic control.'

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines: Use E11 codes for Type 2 diabetes; specify complications when applicable.
  • Common errors: Misclassifying Type 2 as Type 1, omitting complications.

Code Exclusions

Important Exclusions

  • Excluded conditions: Type 1 diabetes, gestational diabetes.
  • Alternative codes: E13 for other specified diabetes mellitus.

Related ICD-10 Codes

Primary Codes
E11.9
Type 2 diabetes mellitus without complications
E11.65
Type 2 diabetes mellitus with hyperglycemia
Ancillary Codes
Z79.4

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Primary Care

Specialty Applications

  • Patient populations: Adults with Type 2 diabetes, particularly those requiring insulin.
  • Clinical settings: Primary care, endocrinology, diabetes management clinics.

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?

Document patient's insulin regimen, blood glucose levels, and any complications.

Billing considerations?

Ensure accurate coding to reflect the complexity of diabetes management and any associated conditions.