O47.00 False labor before 37 completed weeks of gestation, unspecified trimester

Billable ICD-10-CM code, FY2026.

Applies from O47 False labor

Includes

• Braxton Hicks contractions
• threatened labor

Excludes1 (never code together)

• preterm labor (O60.-)

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 644.10 Other threatened labor, unspecified as to episode of care or not applicable (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O47.00

Back-references to O47.0

• Type 1 Excludes: O60 Preterm labor ("false labor (O47.0-)")
• Type 1 Excludes: O60 Preterm labor ("threatened labor NOS (O47.0-)")

Nearby codes

• O47 False labor
• O47.0 False labor before 37 completed weeks of gestation
• O47.00 False labor before 37 completed weeks of gestation, unspecified trimester (this code)
• O47.02 False labor before 37 completed weeks of gestation, second trimester
• O47.03 False labor before 37 completed weeks of gestation, third trimester
• O47.1 False labor at or after 37 completed weeks of gestation
• O47.9 False labor, unspecified