Alphabetic Index FY2027

E08

Diabetes mellitus due to underlying condition

FY2027Chapter 4: Endocrine, nutritional and metabolic diseases/E08–E13 Diabetes mellitus

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

E08 is a non-billable ICD-10-CM code category for diabetes mellitus due to underlying condition. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are E08.0 Diabetes mellitus due to underlying condition with hyperosmolarity, E08.1 Diabetes mellitus due to underlying condition with ketoacidosis, E08.2 Diabetes mellitus due to underlying condition with kidney complications, E08.3 Diabetes mellitus due to underlying condition with ophthalmic complications and 5 more. Its coding notes include a Code first instruction, a Use additional code instruction and 9 Excludes1 entries.

Guidelines tips

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

Diabetes codes combine the type, the body system and the complication, and as many codes as needed are assigned to describe all complications.

Guidelines I.C.4.aDiabetes: combination codesRead the official text

Secondary diabetes is always caused by another condition or event. Sequencing with the cause follows the Tabular List instructions.

Guidelines I.C.4.a.6Secondary diabetes mellitusRead the official text

Code first

If the underlying condition listed here is present and known, sequence it first.

This code
  • 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

Add the listed code as a secondary code, if known.

This 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)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • 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.-)
Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

More specific codes under E08 9