ICD-10 I80.10
Billable / Specific HCC v28: 108 CCPhlebitis and thrombophlebitis of unspecified femoral vein
About ICD-10-CM I80.10
ICD-10-CM code I80.10 represents Phlebitis and thrombophlebitis of unspecified femoral vein. This is a billable/specific code in the Circulatory System chapter (block I80). The 2026 edition of ICD-10-CM I80.10 became effective on October 1, 2025.
Coding Tips for I80.10
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I80.10 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.
I80.10 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
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.
Inpatient DRG Impact, CC
codes Phlebitis and thrombophlebitis of unspecified femoral vein. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for I80.10
Local Coverage Determinations (LCDs) from CMS MACs that list I80.10 as a covered diagnosis.
Showing top 10 of 21 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I80.10.
3 Medicare
2 Aetna
CPT Codes Commonly Billed with I80.10
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Convert I80.10 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 |
|---|---|---|
| I80.10 | 45111 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I80.10
Other codes in section I80-I89 (Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified).
ICD-10 I80.10, Billing FAQ
Is ICD-10 code I80.10 billable? +
Yes, I80.10 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does I80.10 affect Medicare Advantage HCC risk adjustment? +
Yes. I80.10 maps to CMS-HCC v28 category 108. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is I80.10 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with I80.10? +
Procedures frequently paired with I80.10 include: 10140, 93970.
What ICD-9 codes does I80.10 map to? +
Per CMS GEMs, I80.10 maps to ICD-9 codes: 45111. 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 1, 2026.
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