ICD-10 O68
Billable / Specific CCLabor and delivery complicated by abnormality of fetal acid-base balance
About ICD-10-CM O68
ICD-10-CM code O68 represents Labor and delivery complicated by abnormality of fetal acid-base balance. This is a billable/specific code in the Pregnancy, Childbirth, and Puerperium chapter (block O68). The 2026 edition of ICD-10-CM O68 became effective on October 1, 2025.
Coding Tips for O68
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
O68 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Most O codes require a 7th character indicating trimester (1 = first, 2 = second, 3 = third). Some require fetus identification character. Code O09 (supervision of high-risk pregnancy) is required as a secondary code when applicable.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under O68. Per CMS ICD-10-CM Tabular 2026.
- 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
Type 1 Excludes
Pure excludes, these codes can never be coded together with O68. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- 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)
Type 2 Excludes
Not included here, the excluded code is not part of O68, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- abnormality in fetal heart rate or rhythm (O76)
- labor and delivery complicated by meconium in amniotic fluid (O77.0)
Inpatient DRG Impact, CC
codes Labor and delivery complicated by abnormality of fetal acid-base balance. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for O68
Local Coverage Determinations (LCDs) from CMS MACs that list O68 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O68.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but O68 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with O68
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert O68 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| O68 | 65631 | 10000 |
| O68 | 65681 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To O68
Other codes in section O60-O77 (Complications of labor and delivery).
ICD-10 O68, Billing FAQ
Is ICD-10 code O68 billable? +
Yes, O68 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to O68? +
ICD-10 O68 includes: Fetal acidemia complicating labor and delivery; Fetal acidosis complicating labor and delivery; Fetal alkalosis complicating labor and delivery, and 1 more clinical synonyms.
What codes are Type 1 Excludes for O68? +
Type 1 Excludes (never code together with O68): 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)
What codes are Type 2 Excludes for O68? +
Type 2 Excludes (may be coded together when both conditions exist): abnormality in fetal heart rate or rhythm (O76); labor and delivery complicated by meconium in amniotic fluid (O77.0)
Is O68 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does O68 map to? +
Per CMS GEMs, O68 maps to ICD-9 codes: 65631, 65681. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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