ICD-10 I78.0
Billable / Specific HCC v28: 108Hereditary hemorrhagic telangiectasia
About ICD-10-CM I78.0
ICD-10-CM code I78.0 represents Hereditary hemorrhagic telangiectasia. This is a billable/specific code in the Circulatory System chapter (block I78). The 2026 edition of ICD-10-CM I78.0 became effective on October 1, 2025.
Coding Tips for I78.0
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I78.0 is a CMS-HCC v28 risk-adjustment code (category 108). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I78.0. Per CMS ICD-10-CM Tabular 2026.
- Rendu-Osler-Weber disease
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for I78.0
Local Coverage Determinations (LCDs) from CMS MACs that list I78.0 as a covered diagnosis.
Showing top 10 of 364 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I78.0.
3 Aetna
5 Medicare
CPT Codes Commonly Billed with I78.0
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 36468 CMS LCD: Billing and Coding: Treatment of Chronic Venous Insufficiency of the Lower Extremities CMS LCD
Convert I78.0 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| I78.0 | 4480 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I78.0
Other codes in section I70-I79 (Diseases of arteries, arterioles and capillaries).
ICD-10 I78.0, Billing FAQ
Is ICD-10 code I78.0 billable? +
Yes, I78.0 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to I78.0? +
ICD-10 I78.0 includes: Rendu-Osler-Weber disease.
Does I78.0 affect Medicare Advantage HCC risk adjustment? +
Yes. I78.0 maps to CMS-HCC v28 category 108. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with I78.0? +
Procedures frequently paired with I78.0 include: 36468.
What ICD-9 codes does I78.0 map to? +
Per CMS GEMs, I78.0 maps to ICD-9 codes: 4480. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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