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E11

Non-billable

Type 2 diabetes mellitus

E11 is the ICD-10-CM code for Type 2 diabetes mellitus. It is a non-billable category code — use a more specific child code such as E11.0 for billing.

Status
Header (non-billable)
Chapter
E00-E89
Subcodes
10
Edition
FY2026

E00-E89 Endocrine, nutritional and metabolic diseases

Includes

  • •diabetes (mellitus) due to insulin secretory defect
  • •diabetes NOS
  • •insulin resistant diabetes (mellitus)

Excludes1 — not coded here

  • •diabetes mellitus due to underlying condition (E08.-)
  • •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.-)

Use additional 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)

Frequently asked questions

What is ICD-10 code E11?
E11 is the ICD-10-CM code for "Type 2 diabetes mellitus". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
Is E11 a billable code?
No — E11 is a non-billable header code. Use a more specific child code (such as E11.0) for billing.
What are the subcodes of E11?
E11 has 10 more specific child codes, including E11.0, E11.1, E11.2.
What is excluded from E11?
Excludes1 (not coded here): diabetes mellitus due to underlying condition (E08.-); drug or chemical induced diabetes mellitus (E09.-); gestational diabetes (O24.4-); neonatal diabetes mellitus (P70.2).

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

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