Is O26.00 a billable ICD-10-CM code?

Yes. O26.00 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O26.00 sit in the tabular list?

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

O26.00

O26.00 — Excessive weight gain in pregnancy, unspecified trimester

Billable / specific codeICD-10-CM

O26.00 is a billable, specific ICD-10-CM code for excessive weight gain in pregnancy, unspecified trimester. It is valid for submission on a claim.

Excludes2 inherited from the categories above O26.00

Also inherited, and the opposite of Excludes1: these conditions are not part of O26.00, but a patient can have both, so you may code both.

Written on O26.0 — Excessive weight gain in pregnancy

gestational edema (O12.0, O12.2)

Other codes that can never be billed with O26.00

These codes carry an Excludes1 note pointing at O26.00. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O26.00 alone.

Z03.7Encounter for suspected maternal and fetal conditions ruled out

Risk adjustment

O26.00 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

O26.00 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share O26.0. If O26.00 is not quite right, the correct code is usually one of these.

Questions about O26.00

Is O26.00 a billable ICD-10-CM code?: Yes. O26.00 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O26.00 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other maternal disorders predominantly related to pregnancy (O20-O29).