ICD-10 I70.598
Billable / Specific HCC v28: 108Other atherosclerosis of nonautologous biological bypass graft(s) of the extremities, other extremity
About ICD-10-CM I70.598
ICD-10-CM code I70.598 represents Other atherosclerosis of nonautologous biological bypass graft(s) of the extremities, other extremity. This is a billable/specific code in the Circulatory System chapter (block I70). The 2026 edition of ICD-10-CM I70.598 became effective on October 1, 2025.
Coding Tips for I70.598
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I70.598 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.
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 I70.598
Local Coverage Determinations (LCDs) from CMS MACs that list I70.598 as a covered diagnosis.
Showing top 10 of 388 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I70.598.
5 Medicare
CPT Codes Commonly Billed with I70.598
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert I70.598 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 |
|---|---|---|
| I70.598 | 44032 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I70.598
Other codes in section I70-I79 (Diseases of arteries, arterioles and capillaries).
ICD-10 I70.598, Billing FAQ
Is ICD-10 code I70.598 billable? +
Yes, I70.598 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does I70.598 affect Medicare Advantage HCC risk adjustment? +
Yes. I70.598 maps to CMS-HCC v28 category 108. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What ICD-9 codes does I70.598 map to? +
Per CMS GEMs, I70.598 maps to ICD-9 codes: 44032. 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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