O66.1

✓ Billable

Obstructed labor due to locked twins

Pregnancy, childbirth and the puerperium (O00-O9A)

✅ No additional coding notes for O66.1

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Code Information

CodeO66.1

BillableYes

ParentO66

CategoryPregnancy, childbirth and the puerperium (O00-O9A)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)