E10 – Type 1 diabetes mellitus
ICD-10-CM 2027 diagnosis code · Diabetes mellitus
ICD-10-CM code
E10
- Code
E10(claims format:E10)- Description
- Type 1 diabetes mellitus
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 4. Endocrine, nutritional and metabolic diseases (E00-E89)
- Block
- E08-E13 Diabetes mellitus
Billable codes under E10
E10 is a header code and cannot be used on claims. Choose the most specific code:
- E10.1 – Type 1 diabetes mellitus with ketoacidosisHeader (more codes below)
- E10.2 – Type 1 diabetes mellitus with kidney complicationsHeader (more codes below)
- E10.3 – Type 1 diabetes mellitus with ophthalmic complicationsHeader (more codes below)
- E10.4 – Type 1 diabetes mellitus with neurological complicationsHeader (more codes below)
- E10.5 – Type 1 diabetes mellitus with circulatory complicationsHeader (more codes below)
- E10.6 – Type 1 diabetes mellitus with other specified complicationsHeader (more codes below)
- E10.8 – Type 1 diabetes mellitus with unspecified complicationsBillable
- E10.9 – Type 1 diabetes mellitus without complicationsBillable
- E10.A – Type 1 diabetes mellitus, presymptomaticHeader (more codes below)
Notes for E10
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, in the block E08-E13 (Diabetes mellitus).
Is E10 a billable code?
No. E10 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.