O44.21 Partial placenta previa NOS or without hemorrhage, first trimester

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from O44.2 Partial placenta previa without hemorrhage

Applicable to

• Marginal placenta previa, NOS or without hemorrhage

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 641.01 Placenta previa without hemorrhage, delivered, with or without mention of antepartum condition (approximate)
• 641.03 Placenta previa without hemorrhage, antepartum condition or complication (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 O44.21

Back-references to O44

• Type 2 Excludes: O43 Placental disorders ("placenta previa (O44.-)")
• Type 1 Excludes: O46 Antepartum hemorrhage, not elsewhere classified ("placenta previa (O44.-)")
• Type 1 Excludes: O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified ("placenta previa (O44.-)")

Nearby codes

• O44.11 Complete placenta previa with hemorrhage, first trimester
• O44.12 Complete placenta previa with hemorrhage, second trimester
• O44.13 Complete placenta previa with hemorrhage, third trimester
• O44.2 Partial placenta previa without hemorrhage
• O44.20 Partial placenta previa NOS or without hemorrhage, unspecified trimester
• O44.21 Partial placenta previa NOS or without hemorrhage, first trimester (this code)
• O44.22 Partial placenta previa NOS or without hemorrhage, second trimester
• O44.23 Partial placenta previa NOS or without hemorrhage, third trimester
• O44.3 Partial placenta previa with hemorrhage
• O44.30 Partial placenta previa with hemorrhage, unspecified trimester
• O44.31 Partial placenta previa with hemorrhage, first trimester