ICD-10 O74.3
Billable / SpecificCentral nervous system complications of anesthesia during labor and delivery
About ICD-10-CM O74.3
ICD-10-CM code O74.3 represents Central nervous system complications of anesthesia during labor and delivery. This is a billable/specific code in the Pregnancy, Childbirth, and Puerperium chapter (block O74). The 2026 edition of ICD-10-CM O74.3 became effective on October 1, 2025.
Coding Tips for O74.3
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
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.
Medicare LCD Coverage for O74.3
Local Coverage Determinations (LCDs) from CMS MACs that list O74.3 as a covered diagnosis.
Showing top 10 of 40 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O74.3.
2 Medicare
CPT Codes Commonly Billed with O74.3
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 O74.3 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 |
|---|---|---|
| O74.3 | 66821 | 10000 |
| O74.3 | 66822 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To O74.3
Other codes in section O60-O77 (Complications of labor and delivery).
ICD-10 O74.3, Billing FAQ
Is ICD-10 code O74.3 billable? +
Yes, O74.3 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does O74.3 map to? +
Per CMS GEMs, O74.3 maps to ICD-9 codes: 66821, 66822. 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 May 31, 2026.
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