Is E10 a billable ICD-10-CM code?

No. E10 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E10 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Diabetes mellitus (E08-E13).

What cannot be coded together with E10?

E10 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

E10

E10 — Type 1 diabetes mellitus

Non-billable headerICD-10-CM

E10 is a non-billable header ICD-10-CM code for type 1 diabetes mellitus. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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.-)

Includes

Conditions this code covers.

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)

Other codes that can never be billed with E10

These codes carry an Excludes1 note pointing at E10. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E10 alone.

Q45.3Other congenital malformations of pancreas and pancreatic duct
R73.0Abnormal glucose
E87.2Acidosis
E09Drug or chemical induced diabetes mellitus
E08Diabetes mellitus due to underlying condition
E11Type 2 diabetes mellitus
E13Other specified diabetes mellitus
E16.1Other hypoglycemia

Risk adjustment

E10 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead E10

9 child codes. Green means billable.

Questions about E10

Is E10 a billable ICD-10-CM code?: No. E10 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E10 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Diabetes mellitus (E08-E13).
What cannot be coded together with E10?: E10 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.