E10Type 1 diabetes mellitus

E10 is the ICD-10-CM diagnosis code for type 1 diabetes mellitus. It belongs to block E08-E13 (diabetes mellitus) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: E10.1 (with ketoacidosis), E10.2 (with kidney complications), E10.3 (with ophthalmic complications), E10.4 (with neurological complications), E10.5 (with circulatory complications), E10.6 (with other specified complications), E10.8 (with unspecified complications), E10.9 (without complications) and 1 more.

Don't report E10 together with the conditions in its Excludes1 note: diabetes mellitus due to underlying condition (E08.-), drug or chemical induced diabetes mellitus (E09.-), gestational diabetes (O24.4-), hyperglycemia NOS (R73.9) and 5 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.