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ICD-10 Guide
ICD-10 CodesChapter 4: Endocrine, nutritional and metabolic diseasesE11

E11

Billable

Type 2 diabetes mellitus

Chapter 4:Endocrine, nutritional and metabolic diseases

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 E11 is a billable code used to indicate a diagnosis of type 2 diabetes mellitus.

Key Diagnostic Point:

Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance and relative insulin deficiency. It is the most common form of diabetes, accounting for approximately 90-95% of all diabetes cases. The condition is often associated with obesity, sedentary lifestyle, and genetic predisposition. Patients with T2DM may present with symptoms such as increased thirst, frequent urination, fatigue, and blurred vision. Over time, uncontrolled diabetes can lead to serious complications, including cardiovascular disease, neuropathy, nephropathy, and retinopathy. Management of T2DM typically involves lifestyle modifications, oral hypoglycemic agents, and, in some cases, insulin therapy. Regular monitoring of blood glucose levels and HbA1c is essential for assessing long-term glycemic control and adjusting treatment plans accordingly. The condition requires ongoing patient education and support to promote adherence to treatment and prevent complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of complications associated with T2DM
  • Need for accurate HbA1c level documentation
  • Differentiation between controlled and uncontrolled diabetes
  • Potential for co-morbid conditions

Audit Risk Factors

  • Inadequate documentation of HbA1c levels
  • Failure to document complications
  • Misclassification of diabetes type
  • Lack of evidence for insulin use

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Comprehensive documentation of patient history, treatment plans, and follow-up care.

Common Clinical Scenarios

Management of patients with poorly controlled diabetes, initiation of insulin therapy, and treatment of diabetic complications.

Billing Considerations

Ensure clear documentation of HbA1c levels and any complications to support coding.

Primary Care

Documentation Requirements

Regular updates on patient lifestyle changes, medication adherence, and routine lab results.

Common Clinical Scenarios

Routine diabetes management, annual foot exams, and eye exams.

Billing Considerations

Documenting patient education efforts and lifestyle modifications is crucial for coding.

Coding Guidelines

Inclusion Criteria

Use E11 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the type of diabetes, any associated complications, and the patient's current treatment regimen
  • Include HbA1c levels when relevant

Exclusion Criteria

Do NOT use E11 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for routine follow-up visits for diabetes management.

Documentation Requirements

Document patient history, exam findings, and treatment plan.

Specialty Considerations

Endocrinologists may require more detailed documentation of treatment adjustments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of diabetes types and complications, improving data accuracy and patient care management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of diabetes types and complications, improving data accuracy and patient care management.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of diabetes types and complications, improving data accuracy and patient care management.

Resources

Clinical References

  • •
    American Diabetes Association

Coding & Billing References

  • •
    American Diabetes Association

Frequently Asked Questions

What is the difference between E11 and E10?

E11 is used for Type 2 diabetes mellitus, which is characterized by insulin resistance, while E10 is for Type 1 diabetes mellitus, an autoimmune condition where the body does not produce insulin.