E08 Diabetes mellitus due to underlying condition

The ICD-10-CM code for Diabetes mellitus due to underlying condition is E08 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

4: Endocrine, nutritional and metabolic diseases (E00-E89)

Section

E08-E13: Diabetes mellitus (E08-E13)

Category E08

64 codes (47 billable)

FY2026 Status

Stable since FY2024

Official Coding Guidelines

Diabetes codes are combination codes; assign E08–E13 as needed

a. Diabetes mellitus 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.

Secondary diabetes—categories and cause

6) Secondary diabetes mellitus Codes under categories E08, Diabetes mellitus due to underlying condition, E09, Drug or chemical induced diabetes mellitus, and E13, Other specified diabetes mellitus, identify complications/manifestations associated with secondary diabetes mellitus. Secondary diabetes is always caused by another condition or event (e.g., cystic fibrosis, malignant neoplasm of pancreas, pancreatectomy, adverse effect of drug, or poisoning).

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool

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Reference E08 with the canonical source and edition:

E08 — Diabetes mellitus due to underlying condition. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/E08

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