Is O24.4 a billable ICD-10-CM code?

No. O24.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does O24.4 sit in the tabular list?

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

O24.4

O24.4 — Gestational diabetes mellitus

Non-billable headerICD-10-CM

O24.4 is a non-billable header ICD-10-CM code for gestational diabetes mellitus. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Diabetes mellitus arising in pregnancy
Gestational diabetes mellitus NOS

Other codes that can never be billed with O24.4

These codes carry an Excludes1 note pointing at O24.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O24.4 alone.

O99.81Abnormal glucose complicating pregnancy, childbirth and the puerperium
R73.0Abnormal glucose
Z86.32Personal history of gestational diabetes
E09Drug or chemical induced diabetes mellitus
E08Diabetes mellitus due to underlying condition
E10Type 1 diabetes mellitus
E11Type 2 diabetes mellitus
E13Other specified diabetes mellitus

Risk adjustment

O24.4 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 O24.4

3 child codes. Green means billable.

Related codes at this level

Codes that share O24. If O24.4 is not quite right, the correct code is usually one of these.

Questions about O24.4

Is O24.4 a billable ICD-10-CM code?: No. O24.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O24.4 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other maternal disorders predominantly related to pregnancy (O20-O29).