ICD-10 I77.0
Billable / Specific HCC v28: 108Arteriovenous fistula, acquired
About ICD-10-CM I77.0
ICD-10-CM code I77.0 represents Arteriovenous fistula, acquired. This is a billable/specific code in the Circulatory System chapter (block I77). The 2026 edition of ICD-10-CM I77.0 became effective on October 1, 2025.
Coding Tips for I77.0
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I77.0 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 I77.0. Per CMS ICD-10-CM Tabular 2026.
- Aneurysmal varix
- Arteriovenous aneurysm, acquired
Type 1 Excludes
Pure excludes, these codes can never be coded together with I77.0. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- arteriovenous aneurysm NOS (Q27.3-)
- presence of arteriovenous shunt (fistula) for dialysis (Z99.2)
- traumatic - see injury of blood vessel by body region
Type 2 Excludes
Not included here, the excluded code is not part of I77.0, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- cerebral (I67.1)
- coronary (I25.4)
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 I77.0
Local Coverage Determinations (LCDs) from CMS MACs that list I77.0 as a covered diagnosis.
Showing top 10 of 232 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I77.0.
1 Aetna
1 Cigna
5 Medicare
CPT Codes Commonly Billed with I77.0
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 90999 CMS LCD: Billing and Coding: Frequency of Hemodialysis CMS LCD
Convert I77.0 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 |
|---|---|---|
| I77.0 | 4470 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I77.0
Other codes in section I70-I79 (Diseases of arteries, arterioles and capillaries).
ICD-10 I77.0, Billing FAQ
Is ICD-10 code I77.0 billable? +
Yes, I77.0 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 I77.0? +
ICD-10 I77.0 includes: Aneurysmal varix; Arteriovenous aneurysm, acquired.
What codes are Type 1 Excludes for I77.0? +
Type 1 Excludes (never code together with I77.0): arteriovenous aneurysm NOS (Q27.3-); presence of arteriovenous shunt (fistula) for dialysis (Z99.2); traumatic - see injury of blood vessel by body region
What codes are Type 2 Excludes for I77.0? +
Type 2 Excludes (may be coded together when both conditions exist): cerebral (I67.1); coronary (I25.4)
Does I77.0 affect Medicare Advantage HCC risk adjustment? +
Yes. I77.0 maps to CMS-HCC v28 category 108. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with I77.0? +
Procedures frequently paired with I77.0 include: 90999.
What ICD-9 codes does I77.0 map to? +
Per CMS GEMs, I77.0 maps to ICD-9 codes: 4470. 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 May 31, 2026.
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