2026 ICD-10-CM Diagnosis Code E08Diabetes mellitus due to underlying condition
E08 is a non-billable ICD-10-CM category code for diabetes mellitus due to underlying condition, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E08.00, E08.01, E08.10, and E08.11.
Code Identity
Code Classification
Specific Coding for Diabetes mellitus due to underlying conditionOverview
Non-specific codes like E08 require more characters. Use one of these billable codes instead:
E08.0 for Diabetes mellitus due to underlying condition with hyperosmolarity
Use E08.00 for Diabetes mellitus due to underlying condition with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC)
Use E08.01 for Diabetes mellitus due to underlying condition with hyperosmolarity with coma
E08.1 for Diabetes mellitus due to underlying condition with ketoacidosis
Use E08.10 for Diabetes mellitus due to underlying condition with ketoacidosis without coma
Use E08.11 for Diabetes mellitus due to underlying condition with ketoacidosis with coma
E08.2 for Diabetes mellitus due to underlying condition with kidney complications
Use E08.21 for Diabetes mellitus due to underlying condition with diabetic nephropathy
Use E08.22 for Diabetes mellitus due to underlying condition with diabetic chronic kidney disease
Use E08.29 for Diabetes mellitus due to underlying condition with other diabetic kidney complication
E08.3 for Diabetes mellitus due to underlying condition with ophthalmic complications
E08.31 for Diabetes mellitus due to underlying condition with unspecified diabetic retinopathy
E08.32 for Diabetes mellitus due to underlying condition with mild nonproliferative diabetic retinopathy
E08.33 for Diabetes mellitus due to underlying condition with moderate nonproliferative diabetic retinopathy
E08.34 for Diabetes mellitus due to underlying condition with severe nonproliferative diabetic retinopathy
E08.35 for Diabetes mellitus due to underlying condition with proliferative diabetic retinopathy
Use E08.36 for Diabetes mellitus due to underlying condition with diabetic cataract
E08.37 for Diabetes mellitus due to underlying condition with diabetic macular edema, resolved following treatment
Use E08.39 for Diabetes mellitus due to underlying condition with other diabetic ophthalmic complication
E08.4 for Diabetes mellitus due to underlying condition with neurological complications
Use E08.40 for Diabetes mellitus due to underlying condition with diabetic neuropathy, unspecified
Use E08.41 for Diabetes mellitus due to underlying condition with diabetic mononeuropathy
Use E08.42 for Diabetes mellitus due to underlying condition with diabetic polyneuropathy
Use E08.43 for Diabetes mellitus due to underlying condition with diabetic autonomic (poly)neuropathy
Use E08.44 for Diabetes mellitus due to underlying condition with diabetic amyotrophy
Use E08.49 for Diabetes mellitus due to underlying condition with other diabetic neurological complication
E08.5 for Diabetes mellitus due to underlying condition with circulatory complications
Use E08.51 for Diabetes mellitus due to underlying condition with diabetic peripheral angiopathy without gangrene
Use E08.52 for Diabetes mellitus due to underlying condition with diabetic peripheral angiopathy with gangrene
Use E08.59 for Diabetes mellitus due to underlying condition with other circulatory complications
E08.6 for Diabetes mellitus due to underlying condition with other specified complications
E08.61 for Diabetes mellitus due to underlying condition with diabetic arthropathy
E08.62 for Diabetes mellitus due to underlying condition with skin complications
E08.63 for Diabetes mellitus due to underlying condition with oral complications
E08.64 for Diabetes mellitus due to underlying condition with hypoglycemia
Use E08.65 for Diabetes mellitus due to underlying condition with hyperglycemia
Use E08.69 for Diabetes mellitus due to underlying condition with other specified complication
Use E08.8 for Diabetes mellitus due to underlying condition with unspecified complications
Use E08.9 for Diabetes mellitus due to underlying condition without complications
Coding GuidelinesGuidance
The diabetes mellitus codes are combination codes that include the type of diabetes mellitus, the body system affected, and the complications affecting that body system. As many codes within a particular category as are necessary to describe all of the complications of the disease may be used. They should be sequenced based on the reason for a particular encounter. Assign as many codes from categories E08 - E13 as needed to identify all of the associated conditions that the patient has.
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
- the underlying condition, such as:
- congenital rubella P35.0
- Cushing's syndrome E24
- cystic fibrosis E84
- malignant neoplasm C00 C96
- malnutrition E40 E46
- pancreatitis and other diseases of the pancreas K85 K86
Use Additional Code
- code to identify control using:
- injectable non-insulin antidiabetic drugs Z79.85
- insulin Z79.4
- oral antidiabetic drugs Z79.84
- oral hypoglycemic drugs Z79.84
Type 1 Excludes
- drug or chemical induced diabetes mellitus E09
- gestational diabetes O24.4
- neonatal diabetes mellitus P70.2
- postpancreatectomy diabetes mellitus E13
- postprocedural diabetes mellitus E13
- secondary diabetes mellitus NEC E13
- type 1 diabetes mellitus E10
- type 2 diabetes mellitus E11
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Patient EducationClinical
Diabetes
Diabetes, also known as diabetes mellitus, is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose is your body's main source of energy. Your body can make glucose, but it also comes from the food you eat. Insulin is a hormone made by your pancreas.
The full article covers:
- What is diabetes?
- What are the types of diabetes?
- What causes diabetes?
- Who is more likely to develop diabetes?
- What are the symptoms of diabetes?
- How is diabetes diagnosed?
- What are the treatments for diabetes?
- Can diabetes be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About E08Overview
Is E08 (Diabetes mellitus due to underlying condition) a billable code?
No. This is a category header that groups the codes for diabetes mellitus due to underlying condition, and headers cannot be submitted on claims. Claims for diabetes mellitus due to underlying condition need a more specific code from this category, such as E08.00, E08.01, and E08.10.
