V24 HCC 99 (Archived Category) ICD-10-CM
HCC 99 is a payment category of the retired CMS-HCC V24 model, which last determined Medicare Advantage payment in 2025. The 33 ICD-10-CM codes below are its final mappings, kept for lookback analysis and RADV audit reference. Each code shows where it maps in the live V28 model.
Archived Codes of V24 HCC 99 33 codes
- I60.00 Nontraumatic subarachnoid hemorrhage from unspecified carotid siphon and bifurcation now HCC 248
- I60.01 Nontraumatic subarachnoid hemorrhage from right carotid siphon and bifurcation now HCC 248
- I60.02 Nontraumatic subarachnoid hemorrhage from left carotid siphon and bifurcation now HCC 248
- I60.10 Nontraumatic subarachnoid hemorrhage from unspecified middle cerebral artery now HCC 248
- I60.11 Nontraumatic subarachnoid hemorrhage from right middle cerebral artery now HCC 248
- I60.12 Nontraumatic subarachnoid hemorrhage from left middle cerebral artery now HCC 248
- I60.2 Nontraumatic subarachnoid hemorrhage from anterior communicating artery now HCC 248
- I60.30 Nontraumatic subarachnoid hemorrhage from unspecified posterior communicating artery now HCC 248
- I60.31 Nontraumatic subarachnoid hemorrhage from right posterior communicating artery now HCC 248
- I60.32 Nontraumatic subarachnoid hemorrhage from left posterior communicating artery now HCC 248
- I60.4 Nontraumatic subarachnoid hemorrhage from basilar artery now HCC 248
- I60.50 Nontraumatic subarachnoid hemorrhage from unspecified vertebral artery now HCC 248
- I60.51 Nontraumatic subarachnoid hemorrhage from right vertebral artery now HCC 248
- I60.52 Nontraumatic subarachnoid hemorrhage from left vertebral artery now HCC 248
- I60.6 Nontraumatic subarachnoid hemorrhage from other intracranial arteries now HCC 248
- I60.7 Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery now HCC 248
- I60.8 Other nontraumatic subarachnoid hemorrhage now HCC 248
- I60.9 Nontraumatic subarachnoid hemorrhage, unspecified now HCC 248
- I61.0 Nontraumatic intracerebral hemorrhage in hemisphere, subcortical now HCC 248
- I61.1 Nontraumatic intracerebral hemorrhage in hemisphere, cortical now HCC 248
- I61.2 Nontraumatic intracerebral hemorrhage in hemisphere, unspecified now HCC 248
- I61.3 Nontraumatic intracerebral hemorrhage in brain stem now HCC 248
- I61.4 Nontraumatic intracerebral hemorrhage in cerebellum now HCC 248
- I61.5 Nontraumatic intracerebral hemorrhage, intraventricular now HCC 248
- I61.6 Nontraumatic intracerebral hemorrhage, multiple localized now HCC 248
- I61.8 Other nontraumatic intracerebral hemorrhage now HCC 248
- I61.9 Nontraumatic intracerebral hemorrhage, unspecified now HCC 248
- I62.00 Nontraumatic subdural hemorrhage, unspecified now HCC 248
- I62.01 Nontraumatic acute subdural hemorrhage now HCC 248
- I62.02 Nontraumatic subacute subdural hemorrhage now HCC 248
- I62.03 Nontraumatic chronic subdural hemorrhage now HCC 248
- I62.1 Nontraumatic extradural hemorrhage now HCC 248
- I62.9 Nontraumatic intracranial hemorrhage, unspecified now HCC 248
Questions About This Archived Category
Is V24 HCC 99 still paid?
No. The CMS-HCC V24 model last determined Medicare Advantage payment in 2025; from payment year 2026 the V28 model pays 100% of the risk score. This page exists for lookback analysis and RADV audit periods that predate the transition.
Where did these codes go in V28?
Each row above names the code's live V28 category. The category-level picture, with destination counts for every V24 category, is on V24 to V28: What Changed.
Related References
Source: Centers for Medicare & Medicaid Services, Payment Year 2026 risk adjustment mapping and model software releases (CMS-HCC V28; CMS-HCC V24 from the last published V24 mappings, payment year 2025), applied to the FY 2026 ICD-10-CM code set. ICD List is not affiliated with CMS.
