Diabetes Mellitus (DM) is one of the most common chronic metabolic disorders worldwide. For healthcare providers, medical coders, and students, understanding the Diabetes Mellitus ICD 10 is essential for accurate diagnosis reporting, billing, and clinical documentation.

In this blog, we break down the ICD-10 codes for diabetes, explain the classification, list all important subcodes, and highlight key points for easy learning.

⭐ What is Diabetes Mellitus ICD 10?

Diabetes Mellitus ICD-10 refers to the range of ICD-10-CM codes (E08–E13) used to classify different types of diabetes, based on cause, complications, and comorbidities.

These codes help:

Document the diagnosis correctly
Ensure accurate billing
Track disease trends
Improve patient management

🧾 ICD-10 Codes for Diabetes Mellitus (Quick Overview)

Diabetes Category	ICD-10 Code Range
Diabetes due to underlying condition	E08
Drug- or chemical-induced diabetes	E09
Type 1 Diabetes Mellitus	E10
Type 2 Diabetes Mellitus	E11
Other specified diabetes	E13

ICD-10 Code Descriptions in Detail

🔷 1. E08 – Diabetes Mellitus Due to Underlying Condition

Used when diabetes occurs secondary to another disease, such as:

Cushing’s syndrome
Pancreatitis
Hemochromatosis

Common examples:

E08.21 – With diabetic nephropathy
E08.22 – With chronic kidney disease
E08.65 – With hyperglycemia

🔷 2. E09 – Drug or Chemical-Induced Diabetes Mellitus

Used when DM results from:

Steroids
Antipsychotics
Immunosuppressive agents
Environmental toxins

Examples:

E09.649 – With hypoglycemia
E09.65 – With hyperglycemia

🔷 3. E10 – Type 1 Diabetes Mellitus

An autoimmune condition with absolute insulin deficiency.

Important codes:

E10.9 – Type 1 diabetes without complications
E10.65 – With hyperglycemia
E10.641 – With hypoglycemia with coma
E10.21 – With nephropathy

🔷 4. E11 – Type 2 Diabetes Mellitus (Most Common Code)

Used for insulin-resistant diabetes (non-insulin dependent).

Common Type 2 DM ICD-10 Codes:

E11.9 – Type 2 diabetes without complications
E11.65 – With hyperglycemia (very commonly used)
E11.618 – With diabetic neuropathic arthropathy
E11.21 – With nephropathy
E11.42 – With polyneuropathy
E11.69 – With other specified complications

📌 Highlight:
E11.9 and E11.65 are among the most frequently used diabetes codes worldwide.

🔷 5. E13 – Other Specified Diabetes Mellitus

Used when diabetes does not fit into other categories, such as:

Genetic defects of beta-cell function
Post-pancreatectomy diabetes

Examples:

E13.9 – Without complications
E13.65 – With hyperglycemia

⭐ Important Points to Remember (Highlighted)

🔥 Key Highlights

Diabetes Mellitus ICD-10 codes fall under E08–E13.
E11 (Type 2 DM) is the most commonly used code.
Codes must include complications (neuropathy, nephropathy, retinopathy, hyperglycemia, hypoglycemia).
Avoid using unspecified codes unless absolutely necessary.
Always document:
✔ Type of diabetes
✔ Complications
✔ Control status (hyperglycemia/hypoglycemia)
✔ Relationship to underlying disease or drugs

🩺 Clinical Documentation Tips

To code diabetes accurately, documentation should include:

✔ Diabetes Type

(Type 1, Type 2, secondary, drug-induced)

✔ Blood glucose control

Hyperglycemia
Hypoglycemia
No complication

✔ Specific complications

Kidney: nephropathy, CKD
Eye: retinopathy
Nerve: neuropathy
Circulation: PVD
Skin ulcers
Ketoacidosis

✔ Related conditions

Hypertension
Dyslipidemia
Obesity

🧠 Common ICD-10 Codes for Quick Reference

E11.9 – T2DM without complications
E11.65 – T2DM with hyperglycemia
E10.9 – T1DM without complications
E08.22 – Diabetes with CKD
E11.42 – T2DM with polyneuropathy

❓ FAQs on Diabetes Mellitus ICD 10

1. What is the ICD-10 code for uncontrolled diabetes?

There is no “uncontrolled” term. Use:

E11.65 for uncontrolled Type 2 (hyperglycemia)
E10.65 for uncontrolled Type 1

2. What ICD-10 code is used for diabetes without complications?

E11.9 – Type 2
E10.9 – Type 1

3. What is the ICD-10 for diabetic neuropathy?

E11.40 – Unspecified neuropathy
E11.42 – Polyneuropathy (most common)

4. What is the ICD-10 code for diabetes with CKD?

E11.22 – Type 2 DM with CKD
(Use additional code for CKD stage: N18.x)

5. Can Type 2 diabetes convert to Type 1 ICD-10?

No. The diagnosis depends on pathology, not insulin use.
Type 2 diabetics on insulin still use E11.x, not E10.

6. What is the ICD-10 code for gestational diabetes?

Gestational diabetes is NOT under E08–E13.
Use O24.4x range.

📌 Conclusion

Understanding the ICD-10 codes for Diabetes Mellitus is essential for healthcare professionals, medical coders, and students. Proper documentation and accurate coding help ensure correct billing, better patient management, and improved clinical outcomes.

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Diabetes Mellitus ICD 10: Complete Guide (Types, Coding, Documentation & FAQs)