Alphabetic Index FY2027

E10.A

Type 1 diabetes mellitus, presymptomatic

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.

E10.A is a non-billable ICD-10-CM code header for type 1 diabetes mellitus, presymptomatic. 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 E10.A0 Type 1 diabetes mellitus, presymptomatic, unspecified; E10.A1 Type 1 diabetes mellitus, presymptomatic, Stage 1 and E10.A2 Type 1 diabetes mellitus, presymptomatic, Stage 2. Its coding notes include 10 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

Remission is assigned from provider documentation, and "resolved" is not synonymous with remission. E10.A- is for early-stage type 1 diabetes before symptoms.

Guidelines I.C.4.a.1Type 2 diabetes in remission and presymptomatic type 1Read the official text

Excludes1

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

Inherited from E10 Type 1 diabetes mellitus
  • diabetes mellitus due to underlying condition (E08.-)
  • drug or chemical induced diabetes mellitus (E09.-)
  • gestational diabetes (O24.4-)
  • hyperglycemia NOS (R73.9)
  • neonatal diabetes mellitus (P70.2)
  • postpancreatectomy diabetes mellitus (E13.-)
  • postprocedural diabetes mellitus (E13.-)
  • secondary diabetes mellitus NEC (E13.-)
  • 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)

Includes

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

Inherited from E10 Type 1 diabetes mellitus
  • brittle diabetes (mellitus)
  • diabetes (mellitus) due to autoimmune process
  • diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction
  • idiopathic diabetes (mellitus)
  • juvenile onset diabetes (mellitus)
  • ketosis-prone diabetes (mellitus)

Inclusion terms

Conditions classified to this code.

This code
  • Early-stage type 1 diabetes mellitus

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.

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 1 entry

More specific codes under E10.A 3