Question 1

What is ICD-10 code O45.023?

Accepted Answer

O45.023 is the ICD-10-CM diagnosis code for premature separation of placenta with disseminated intravascular coagulation, third trimester. The placenta separates prematurely from the uterus during the third trimester, causing disseminated intravascular coagulation (a life-threatening condition where blood clots form throughout the body and clotting factors are depleted). O45.023 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).

O45.023 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 is a critical obstetric emergency; ensure all complications and interventions are documented for complete coding.

Question 2

Is O45.023 an HCC code?

Accepted Answer

No. O45.023 is a billable ICD-10-CM code but does not map to any payment HCC category under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can still be reported on Medicare Advantage encounter data submissions, but it does not contribute to the beneficiary's Risk Adjustment Factor (RAF) score and therefore does not affect the risk-adjusted capitation payment to the plan. V28 reached 100% phase-in for payment year 2026.

Question 3

Is O45.023 billable?

Accepted Answer

Yes. O45.023 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. O45.023 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Question 4

What is the V28 vs V24 difference for O45.023?

Accepted Answer

O45.023 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards O45.023 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

Question 5

What should coders know when reporting O45.023?

Accepted Answer

This is a critical obstetric emergency; ensure all complications and interventions are documented for complete coding Third trimester DIC with placental abruption typically requires ICU-level care and may result in emergency delivery

O45.023

Is O45.023 an HCC code?

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