Q87.82
BillableArterial tortuosity syndrome
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Q87.82 an HCC code?
No. Q87.82 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for Q87.82
For Q87.82to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed Q87.82 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
Q87.82 is the ICD-10-CM diagnosis code for arterial tortuosity syndrome. Arterial tortuosity syndrome is a rare genetic disorder where blood vessels become abnormally twisted and dilated, potentially affecting multiple organ systems. Q87.82 sits in the ICD-10-CM chapter for congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (q00-qa0), within the section covering other congenital malformations (q80-q89).
Q87.82 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.
Maps to RxHCC 84 (Muscular Dystrophy) with RAF weight 0.0 in the RxHCC model only. This rare condition with significant morbidity and mortality risk does not contribute to risk adjustment in CMS-HCC models. Coders reviewing Q87.82 should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC — capturing the correct specificity is the highest-leverage RAF improvement available within accurate coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q87.82 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document which arteries are affected and any associated complications such as aneurysms or dissection
- •Ensure imaging studies are documented to support the diagnosis and guide vascular management
Clinical Significance
Arterial tortuosity syndrome is a rare and serious connective tissue disorder that can lead to life-threatening vascular complications including arterial rupture and stroke. The condition requires specialized vascular monitoring and may necessitate surgical intervention to prevent catastrophic events.
Documentation Requirements
- ✓Genetic testing confirming arterial tortuosity syndrome
- ✓Vascular imaging showing tortuous, dilated arteries
- ✓Documentation of affected arterial territories
- ✓Family history of vascular abnormalities
- ✓Neurologic assessment for stroke risk
- ✓Cardiac evaluation for associated abnormalities
- ✓Vascular surgery consultation notes
- ✓Assessment of surgical intervention needs