MCMCB Pro
O68

O68Labor and delivery complicated by abnormality of fetal acid-base balance

Billable / specific codeICD-10-CM

O68 is a billable, specific ICD-10-CM code for labor and delivery complicated by abnormality of fetal acid-base balance. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • fetal stress NOS (O77.9)
  • labor and delivery complicated by electrocardiographic evidence of fetal stress (O77.8)
  • labor and delivery complicated by ultrasonic evidence of fetal stress (O77.8)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • abnormality in fetal heart rate or rhythm (O76)
  • labor and delivery complicated by meconium in amniotic fluid (O77.0)

Inclusion terms

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

  • Fetal acidemia complicating labor and delivery
  • Fetal acidosis complicating labor and delivery
  • Fetal alkalosis complicating labor and delivery
  • Fetal metabolic acidemia complicating labor and delivery

Other codes that can never be billed with O68

These codes carry an Excludes1 note pointing at O68. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O68 alone.

  • O77.8Labor and delivery complicated by other evidence of fetal stress
  • O77.9Labor and delivery complicated by fetal stress, unspecified

Risk adjustment

O68 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.

How O68 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to O68.

  • Pregnancycomplicated byfetalacidemia
  • Pregnancycomplicated byfetalacidosis
  • Pregnancycomplicated byfetalalkalosis
  • Deliverycomplicatedbyfetalabnormal acid-base balance
  • Deliverycomplicatedbyfetalacidemia
  • Deliverycomplicatedbyfetalacidosis
  • Deliverycomplicatedbyfetalalkalosis
  • Pregnancycomplicated byfetalabnormality or damageacid-base balance

Questions about O68

Is O68 a billable ICD-10-CM code?
Yes. O68 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O68 sit in the tabular list?
Pregnancy, childbirth and the puerperium (O00-O9A), in the block Complications of labor and delivery (O60-O77).
What cannot be coded together with O68?
O68 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.