ICD-10 E08
Non-Billable HeaderDiabetes mellitus due to underlying condition
About ICD-10-CM E08
ICD-10-CM code E08 represents Diabetes mellitus due to underlying condition. This is a non-billable header code in the Endocrine, Nutritional, and Metabolic chapter (block E08). The 2026 edition of ICD-10-CM E08 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with E08. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- 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.-)
Use Additional Code
When coding E08, also report these additional codes when applicable.
- 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)
Coding Notes
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.-)
Medicare LCD Coverage for E08
Local Coverage Determinations (LCDs) from CMS MACs that list E08 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing E08.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but E08 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with E08
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To E08
Other codes in section E08-E13 (Diabetes mellitus).
ICD-10 E08, Billing FAQ
Is ICD-10 code E08 billable? +
No, E08 is a non-billable header code. Use a more specific child code from block E08 when submitting claims.
What codes are Type 1 Excludes for E08? +
Type 1 Excludes (never code together with E08): drug or chemical induced diabetes mellitus (E09.-); gestational diabetes (O24.4-); neonatal diabetes mellitus (P70.2)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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