E10

Non-billable

Type 1 diabetes mellitus

E10 is the ICD-10-CM code for Type 1 diabetes mellitus. It is a non-billable category code — use a more specific child code such as E10.1 for billing.

Status
Header (non-billable)
Chapter
E00-E89
Subcodes
9
Edition
FY2026

E00-E89 Endocrine, nutritional and metabolic diseases

Includes

  • 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)

Excludes1 — not coded here

  • 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.-)

Frequently asked questions

What is ICD-10 code E10?
E10 is the ICD-10-CM code for "Type 1 diabetes mellitus". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
Is E10 a billable code?
No — E10 is a non-billable header code. Use a more specific child code (such as E10.1) for billing.
What are the subcodes of E10?
E10 has 9 more specific child codes, including E10.1, E10.2, E10.3.
What is excluded from E10?
Excludes1 (not coded here): diabetes mellitus due to underlying condition (E08.-); drug or chemical induced diabetes mellitus (E09.-); gestational diabetes (O24.4-); hyperglycemia NOS (R73.9).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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