E13

Other specified diabetes mellitus

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.

Use additional code
Excludes1

E13 is a non-billable ICD-10-CM code category for other specified diabetes mellitus. 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 E13.0 Other specified diabetes mellitus with hyperosmolarity, E13.1 Other specified diabetes mellitus with ketoacidosis, E13.2 Other specified diabetes mellitus with kidney complications, E13.3 Other specified diabetes mellitus with ophthalmic complications and 5 more. Its coding notes include a Use additional code instruction and 8 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

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

diabetes (mellitus) due to autoimmune process (E10.-)
diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction (E10.-)
diabetes mellitus due to underlying condition (E08.-)
drug or chemical induced diabetes mellitus (E09.-)
gestational diabetes (O24.4-)
neonatal diabetes mellitus (P70.2)
type 1 diabetes mellitus (E10.-)

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)

Includes

Further defines or gives examples of the content of the category.

This code

diabetes mellitus due to genetic defects of beta-cell function
diabetes mellitus due to genetic defects in insulin action
postpancreatectomy diabetes mellitus
postprocedural diabetes mellitus
secondary diabetes mellitus NEC

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 E13 9