O46.001 ICD-10-CM Code: Antepartum hemorrhage with coagulation defect, unspecified, first trimester
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FY 2026 Apr update / Pregnancy, childbirth and the puerperium (O00-O9A) / Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
O46.001
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAntepartum hemorrhage with coagulation defect, unspecified, first trimester
Bleeding from the uterus before labor begins during the first trimester, associated with a blood clotting disorder that is not further specified.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
MappedHCC 211
Varies by metal level
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for O46.001 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for O46.001 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for O46.001 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for O46.001 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for O46.001 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for O46.001 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for O46.001 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is O46.001 an HCC code?
No. O46.001 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
O46.001 is the ICD-10-CM diagnosis code for antepartum hemorrhage with coagulation defect, unspecified, first trimester. Bleeding from the uterus before labor begins during the first trimester, associated with a blood clotting disorder that is not further specified. O46.001 sits in the ICD-10-CM chapter for pregnancy, childbirth and the puerperium (o00-o9a), within the section covering maternal care related to the fetus and amniotic cavity and possible delivery problems (o30-o48).
O46.001 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This code is for antepartum hemorrhage (before labor) with coagulation defect; distinguish from placental abruption codes.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O46.001 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code is for antepartum hemorrhage (before labor) with coagulation defect; distinguish from placental abruption codes
- •The '001' indicates unspecified coagulation defect; if the specific defect is documented, use a more specific code