Question 1

What is ICD-10 code N83.512?

Accepted Answer

N83.512 is the ICD-10-CM diagnosis code for torsion of left ovary and ovarian pedicle. The left ovary has twisted on its supporting tissue (pedicle), cutting off blood supply and causing acute pain. N83.512 sits in the ICD-10-CM chapter for diseases of the genitourinary system (n00-n99), within the section covering noninflammatory disorders of female genital tract (n80-n98).

N83.512 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 an acute condition requiring prompt diagnosis; specify left side in documentation.

Question 2

Is N83.512 an HCC code?

Accepted Answer

No. N83.512 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 N83.512 billable?

Accepted Answer

Yes. N83.512 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. N83.512 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

Which HCC does N83.512 map to under V28?

Accepted Answer

N83.512 does not map to a CMS-HCC V28 payment category. Check the current CMS-HCC V28 model file for payment year 2026 rather than an older V24 tip sheet.

Question 5

What does N83.512 pay in RAF?

Accepted Answer

N83.512 has no separately stated V28 community RAF weight. If it is not a V28 payment HCC, it adds nothing to a community RAF score.

Question 6

What is the V28 vs V24 difference for N83.512?

Accepted Answer

N83.512 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 community model rewards N83.512 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's V28/V24 community RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a community payment HCC.

Question 7

What documentation supports N83.512?

Accepted Answer

This is an acute condition requiring prompt diagnosis; specify left side in documentation Ovarian torsion is a surgical emergency; document time of onset and severity of symptoms N83.512 is not a CMS-HCC payment code, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

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N83.512

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N83.512 ICD-10-CM Code: Torsion of left ovary and ovarian pedicle

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N83.512

Is N83.512 an HCC code?

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What This Code Means

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N83.512 code history

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