Is E13 a billable ICD-10-CM code?

No. E13 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E13 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 E13?

E13 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

E13

E13 — Other specified diabetes mellitus

Non-billable headerICD-10-CM

E13 is a non-billable header ICD-10-CM code for other specified 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 autoimmune process (E10.-)
diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction (E10.-)
diabetes mellitus due to underlying condition (E08.-)
drug or chemical induced diabetes mellitus (E09.-)
gestational diabetes (O24.4-)
neonatal diabetes mellitus (P70.2)
type 1 diabetes mellitus (E10.-)

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)

Includes

Conditions this code covers.

diabetes mellitus due to genetic defects of beta-cell function
diabetes mellitus due to genetic defects in insulin action
postpancreatectomy diabetes mellitus
postprocedural diabetes mellitus
secondary diabetes mellitus NEC

Other codes that can never be billed with E13

These codes carry an Excludes1 note pointing at E13. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E13 alone.

L92.1Necrobiosis lipoidica, not elsewhere classified
L99Other disorders of skin and subcutaneous tissue in diseases classified elsewhere
M14Arthropathies in other diseases classified elsewhere
M14.6Charcot's joint
M90Osteopathies in diseases classified elsewhere
N08Glomerular disorders in diseases classified elsewhere
N16Renal tubulo-interstitial disorders in diseases classified elsewhere
N76.82Fournier disease of vagina and vulva

Risk adjustment

E13 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 E13

9 child codes. Green means billable.

Questions about E13

Is E13 a billable ICD-10-CM code?: No. E13 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E13 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 E13?: E13 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.