Is O24.3 a billable ICD-10-CM code?

No. O24.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does O24.3 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other maternal disorders predominantly related to pregnancy (O20-O29).

O24.3

O24.3 — Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium

Non-billable headerICD-10-CM

O24.3 is a non-billable header ICD-10-CM code for unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium. It cannot be billed on its own: choose one of the more specific child codes below.

Use additional code

Add a secondary code to capture the detail described below.

code (for):
from category E11 to further identify any manifestation
injectable non-insulin antidiabetic drugs (Z79.85)
long-term (current) use of insulin (Z79.4)

Other codes that can never be billed with O24.3

These codes carry an Excludes1 note pointing at O24.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O24.3 alone.

R73Elevated blood glucose level

Risk adjustment

O24.3 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

O24.3 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 O24.3

3 child codes. Green means billable.

Related codes at this level

Codes that share O24. If O24.3 is not quite right, the correct code is usually one of these.

Questions about O24.3

Is O24.3 a billable ICD-10-CM code?: No. O24.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O24.3 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other maternal disorders predominantly related to pregnancy (O20-O29).