Is O40.9XX5 a billable ICD-10-CM code?

Yes. O40.9XX5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O40.9XX5 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).

What cannot be coded together with O40.9XX5?

O40.9XX5 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O40.9XX5 (O40) and apply to it just the same.

O40.9XX5

O40.9XX5 — Polyhydramnios, unspecified trimester, fetus 5

Billable / specific codeICD-10-CM

O40.9XX5 is a billable, specific ICD-10-CM code for polyhydramnios, unspecified trimester, fetus 5. It is valid for submission on a claim.

7th character "5" — fetus 5

One of the following 7th characters is to be assigned to each code under category O40. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O40 that has a 7th character of 1 through 9.

0: not applicable or unspecified
1: fetus 1
2: fetus 2
3: fetus 3
4: fetus 4
5: fetus 5
9: other fetus

Excludes1 inherited from the categories above O40.9XX5

These are not written on O40.9XX5, but they bind it: a note on a category applies to every code beneath it. Billing O40.9XX5 with anything listed here is a denial.

Written on O40 — Polyhydramnios

encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

Other codes that can never be billed with O40.9XX5

These codes carry an Excludes1 note pointing at O40.9XX5. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O40.9XX5 alone.

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

Risk adjustment

O40.9XX5 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

O40.9XX5 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 O40.9. If O40.9XX5 is not quite right, the correct code is usually one of these.

Questions about O40.9XX5

Is O40.9XX5 a billable ICD-10-CM code?: Yes. O40.9XX5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O40.9XX5 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).
What cannot be coded together with O40.9XX5?: O40.9XX5 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O40.9XX5 (O40) and apply to it just the same.