Is E08 a billable ICD-10-CM code?

No. E08 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E08 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 E08?

E08 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.

E08

E08 — Diabetes mellitus due to underlying condition

Non-billable headerICD-10-CM

E08 is a non-billable header ICD-10-CM code for diabetes mellitus due to underlying condition. 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.

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.-)
type 2 diabetes mellitus (E11.-)

Code first

The underlying condition must be sequenced before this code.

the underlying condition, such as:
congenital rubella (P35.0)
Cushing's syndrome (E24.-)
cystic fibrosis (E84.-)
malignant neoplasm (C00-C96)
malnutrition (E40-E46)
pancreatitis and other diseases of the pancreas (K85-K86.-)

Use additional code

Add a secondary code to capture the detail described below.

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)

Other codes that can never be billed with E08

These codes carry an Excludes1 note pointing at E08. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E08 alone.

E10Type 1 diabetes mellitus
E11Type 2 diabetes mellitus
E13Other specified diabetes mellitus
E16.1Other hypoglycemia
E16.2Hypoglycemia, unspecified
E74Other disorders of carbohydrate metabolism
E87.2Acidosis
G54.5Neuralgic amyotrophy

Risk adjustment

E08 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 history

E08 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead E08

9 child codes. Green means billable.

Questions about E08

Is E08 a billable ICD-10-CM code?: No. E08 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E08 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 E08?: E08 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.