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Comprehensive Guide to Type 2 Diabetes ICD-10 Codes for Accurate Billing (2024 Update)

Diabetes ICD 10

Type 2 diabetes is a common and chronic condition characterized by high blood sugar levels due to insulin resistance. Accurate coding of type 2 diabetes is essential for proper documentation, efficient billing, and effective patient care management. 

The ICD-10 system ensures specific codes to different aspects of type 2 diabetes, providing that healthcare providers, medical billers, and coders can accurately record and bill for this condition.

This guide helps with the essential ICD-10 codes for type 2 diabetes mellitus, providing a detailed overview of how to use these codes for accurate billing.

Understanding Type 2 Diabetes

Type 2 diabetes is a chronic condition where the body either resists the effects of insulin or doesn’t produce enough insulin to maintain normal blood glucose levels. This section discusses the disease’s causes, risk factors, and key aspects.

Causes and Risk Factors

The causes of type 2 diabetes include genetic and lifestyle factors. Understanding these can help in accurate coding and documentation.

Causes of Type 2 Diabetes

  • Insulin Resistance: The body’s cells become less responsive to insulin, causing high blood sugar levels.
  • Insufficient Insulin Production: The pancreas does not produce enough insulin to regulate blood glucose effectively.

Major Risk Factors

  • Obesity: Excess body weight significantly increases the risk.
  • Sedentary Lifestyle: Lack of physical activity contributes to insulin resistance.
  • Family History: A family history of diabetes can increase the likelihood of developing the condition.
  • Age: The risk of type 2 diabetes increases with age, particularly after 45.
  • Hypertension: High blood pressure is often associated with type 2 diabetes.

Diagnosing Type 2 Diabetes

Accurate diagnosis of type 2 diabetes is crucial for effective treatment and management. This section explains common diagnostic tests and the appropriate ICD-10 code for documenting type 2 diabetes.

Common Diagnostic Tests

Different tests are used to diagnose type 2 diabetes. These tests help healthcare providers determine blood glucose levels and diagnose diabetes accurately.

  • Fasting Plasma Glucose (FPG): Measures blood sugar after an overnight fast. A level of 126 mg/dL or higher indicates diabetes.
  • Oral Glucose Tolerance Test (OGTT): Measures blood sugar before and two hours after consuming a glucose-rich drink. A two-hour blood sugar level of 200 mg/dL or higher indicates diabetes.
  • Hemoglobin A1c (HbA1c): Provides an average blood sugar level over the past two to three months. An A1c level of 6.5% or higher indicates diabetes.

ICD-10 Code for Diagnosis

The correct ICD-10 code for diagnosing type 2 diabetes is essential for accurate documentation and billing.

E11.9 – Type 2 Diabetes Mellitus Without Complications:

ICD-10 Code Description Billable Additional Codes
E 11.9 Use for patients diagnosed with type 2 diabetes who do not have complications such as heart disease, kidney issues, or eye problems. Yes Z79.4 for long-term use of insulin. Z79.84 for long-term use of oral hypoglycemic drugs
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Coding for Type 2 Diabetes with ICD-10 Codes

Accurate ICD-10 coding for type 2 diabetes is important for documentation and billing. This section discusses the primary codes and considerations for additional coding.

Additional Codes and Considerations

Additional codes are necessary to specify treatment methods and any long-term medication use. These codes provide a comprehensive view of the patient’s treatment plan.

  • Long-term Insulin Use (Z79.4): This code indicates the patient is on long-term insulin therapy.
  • Long-term Use of Oral Hypoglycemic Drugs (Z79.84): Use this code when the patient is taking oral medications for diabetes management.

ICD-10 Codes for Type 2 Diabetes

Following are the common ICD-10 codes for type 2 diabetes:

ICD-10 Code Description Billable
E11.9 Type 2 diabetes mellitus without complications. Use for patients diagnosed with type 2 diabetes without any complications such as heart disease, kidney issues, or eye problems. Yes
E11.0 Type 2 diabetes mellitus with hyperosmolarity. Use when the patient presents hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma. Yes
.E11.1 Type 2 diabetes mellitus with ketoacidosis. Use when the patient has ketoacidosis without coma. Yes
E11.2 Type 2 diabetes mellitus with kidney complications. Use when the patient has diabetic nephropathy or other kidney issues. Yes

Complications of Type 2 Diabetes

High blood sugar levels in type 2 diabetes can lead to various complications. Proper documentation of these complications is essential for patient care and billing.

Common Complications

Type 2 diabetes can cause a range of health issues that affect different parts of the body. Here are some of the most common complications:

  • Cardiovascular Disease: Increased risk of heart disease and stroke.
  • Neuropathy: Nerve damage causing pain, tingling, or numbness, typically in the hands and feet.
  • Nephropathy: Kidney damage that can lead to chronic kidney disease or kidney failure.
  • Retinopathy: Eye damage that can result in vision problems or blindness.
  • Foot Damage: Poor circulation and nerve damage can lead to foot ulcers and infections.
  • Skin Conditions: Higher risk of bacterial and fungal infections.
  • Hearing Impairment: Increased risk of hearing loss.
  • Alzheimer’s Disease: Higher likelihood of developing Alzheimer’s or other forms of dementia.

Accurate ICD-10 coding for complications Type2 Diabetes

ICD-10 Code Description
E11.22 Type 2 diabetes mellitus with diabetic chronic kidney disease
E11.40 Type 2 diabetes mellitus with diabetic neuropathy, unspecified
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Treatment for Type 2 Diabetes

Effective treatment for type 2 diabetes emerges through lifestyle changes and medications. This section outlines the key aspects of treatment to manage and control the condition.

Lifestyle Changes

Adopting healthy lifestyle changes is crucial for managing type 2 diabetes. These changes can help control blood sugar levels and improve overall health.


  • Eat a balanced diet rich in fruits, vegetables, and whole grains.
  • Avoid trans fats and limit saturated fats and cholesterol.
  • Reduce intake of sugary foods and beverages.


  • Keep engaged in regular physical activity, such as walking, swimming, or cycling.
  • Aim for at least 150 minutes of moderate aerobic exercise per week.
  • Include strength training exercises to improve muscle mass and insulin sensitivity.

Weight Management:

  • Maintain a healthy weight to reduce insulin resistance.
  • Work with a healthcare provider to develop a weight loss plan if necessary.


Medications are often prescribed to help manage blood sugar levels in patients with type 2 diabetes. The type of medication depends on the individual’s needs and medical history.

Oral Medications:

  • Metformin: Commonly prescribed to lower blood sugar levels by improving the body’s response to insulin.
  • Sulfonylureas: Stimulate the pancreas to produce more insulin (e.g., glipizide, glyburide).
  • DPP-4 Inhibitors: Help reduce blood sugar levels without causing weight gain (e.g., sitagliptin, saxagliptin).

Injectable Medications:

  • Insulin: Prescribed when the pancreas cannot produce enough insulin. Various types include long-acting, short-acting, and rapid-acting insulin.
  • GLP-1 Receptor Agonists: Help lower blood sugar levels and promote weight loss (e.g., exenatide, liraglutide).
Ensure Accurate Billing with Our Detailed Guide on Type 2 Diabetes ICD-10 Codes – Read Now!


Accurate coding and effective management of type 2 diabetes are crucial for patient care and billing. Understanding and using the correct ICD-10 codes ensures proper documentation and reimbursement. This guide explains the key aspects of coding for type 2 diabetes, including diagnosis, complications, and treatment. Implementing healthy lifestyle changes and appropriate medications supports the management of this chronic condition. 


The ICD-10 code for type 2 diabetes without complications is E11.9.

Accurate coding ensures proper documentation, billing, and patient care management.

The ICD-10 code for type 2 diabetes with kidney complications is E11.22.

Common tests include Fasting Plasma Glucose (FPG), Oral Glucose Tolerance Test (OGTT), and Hemoglobin A1c (HbA1c).

Use Z79.4 for long-term insulin use and Z79.84 for long-term use of oral hypoglycemic drugs.

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