What is ICD-10 code I80.13?

I80.13 is the ICD-10-CM diagnosis code for Phlebitis and thrombophlebitis of femoral vein, bilateral. Inflammation and blood clot formation in the femoral veins of both legs. It belongs to the ICD-10-CM chapter for diseases of the circulatory system (i00-i99). I80.13 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. I80.13 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. I80.13 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. I80.13 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for I80.13?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. For I80.13, V28 maps to Deep Vein Thrombosis and Pulmonary Embolism at RAF 0.294 while V24 mapped to Vascular Disease at RAF 0.288. Both models can still appear in legacy data and in payer-specific lookback periods.

What should coders know when reporting I80.13?

Bilateral femoral vein involvement is a serious condition requiring careful documentation Ensure clinical documentation explicitly states bilateral femoral vein involvement Because I80.13 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score.

2026 ICD-10-CM I80.13: Phlebitis

ICD-10-CM Code View

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Code lookupI80.13Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

I80.13

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Phlebitis and thrombophlebitis of femoral vein, bilateral

Inflammation and blood clot formation in the femoral veins of both legs.

Buddy Insight

Phlebitis and thrombophlebitis of the bilateral femoral vein represents deep vein thrombosis in a proximal lower extremity vein, which carries significant risk for pulmonary embolism.

CMS-HCC V28

Mapped

HCC 267

Deep Vein Thrombosis and Pulm...

RAF 0.294

CMS-HCC V24

Mapped

HCC 108

Vascular Disease

RAF 0.288

ACA/HHS

Mapped

HCC 156

HHS-HCC 156

Varies by metal level

ESRD/PACE

Mapped

HCC 108

Vascular Disease

RAF 0.073

RXHCC

Mapped

HCC 215

Pulmonary Embolism and Other ...

RAF 0.228

Code Book Path

Official

I80Phlebitis and thrombophlebitis

I80.1Phlebitis and thrombophlebitis of femoral vein

I80.13Phlebitis and thrombophlebitis of femoral vein, bilateral

Inclusion Terms

Official

Phlebitis and thrombophlebitis of common femoral vein
Phlebitis and thrombophlebitis of deep femoral vein

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for I80.13 in this effective period.

Related Child Codes

Official

I80.10Phlebitis and thrombophlebitis of unspecified femoral vein

I80.11Phlebitis and thrombophlebitis of right femoral vein

I80.12Phlebitis and thrombophlebitis of left femoral vein

Includes

Official

ICD-10-CM does not list Includes notes for I80.13 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for I80.13 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for I80.13 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for I80.13 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for I80.13 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Duplex ultrasound or other imaging confirming femoral vein thrombosis

Laterality documentation — bilateral side confirmed

Distinction between acute, subacute, and chronic thrombosis

Assessment for concurrent pulmonary embolism

MEAT Support

HCC Buddy guidance

Duplex ultrasound or other imaging confirming femoral vein thrombosis

Laterality documentation — bilateral side confirmed

Distinction between acute, subacute, and chronic thrombosis

Assessment for concurrent pulmonary embolism

Audit Caution

HCC Buddy guidance

Confusing superficial thrombophlebitis (I80.0x) with deep vein thrombophlebitis of the femoral vein

Not specifying laterality when documentation supports right, left, or bilateral

Failing to distinguish between acute and chronic deep vein thrombosis for correct code selection

Not coding concurrent pulmonary embolism when documented

Common Mistakes

HCC Buddy guidance

I82.4x — Deep vein thrombosis of femoral vein: acute embolism and thrombosis codes; verify correct code series

I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities: superficial, not deep

I80.20x — Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremity: less specific than femoral

I26.x — Pulmonary embolism: code additionally if pulmonary embolism is documented

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is I80.13 an HCC code?

Yes. I80.13 (Phlebitis and thrombophlebitis of femoral vein, bilateral) maps to Deep Vein Thrombosis and Pulmonary Embolism under the CMS-HCC V28 risk adjustment model (and Vascular Disease under V24), with a community non-dual aged RAF of 0.294. It is billable for payment year 2026.

Coder answer: I80.13 is billable and maps to V28 HCC 267, Deep Vein Thrombosis and Pulmonary Embolism. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: I80.13
Description: Phlebitis and thrombophlebitis of femoral vein, bilateral
HCC (V28): HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism
RAF: 0.294
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 267, Deep Vein Thrombosis and Pulmonary Embolism

0.294

V24HCC 108, Vascular Disease

0.288

ESRDHCC 108, Vascular Disease

0.073

RxHCCHCC 215, Pulmonary Embolism and Other Vascular Disease

0.228

Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. 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.

Work I80.13 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for I80.13

For I80.13 to 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 I80.13 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

I80.13 is the ICD-10-CM diagnosis code for phlebitis and thrombophlebitis of femoral vein, bilateral. Inflammation and blood clot formation in the femoral veins of both legs. I80.13 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (i80-i89).

Under the CMS-HCC V28 risk adjustment model, I80.13 maps to Deep Vein Thrombosis and Pulmonary Embolism (HCC 267) with a community, non-dual, aged base RAF weight of 0.294. Under the older CMS-HCC V24 model, I80.13 maps to Vascular Disease (HCC 108) with a community, non-dual, aged base RAF weight of 0.288. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.

Bilateral femoral vein involvement is a serious condition requiring careful documentation. Because I80.13 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for I80.13 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Bilateral femoral vein involvement is a serious condition requiring careful documentation
•Ensure clinical documentation explicitly states bilateral femoral vein involvement

Clinical Significance

Phlebitis and thrombophlebitis of the bilateral femoral vein represents deep vein thrombosis in a proximal lower extremity vein, which carries significant risk for pulmonary embolism. The femoral vein is a major deep vein, and thrombosis here is considered a high-risk deep vein thrombosis requiring anticoagulation therapy. This condition reflects acute vascular disease burden and ongoing management needs for risk adjustment.

Documentation Requirements

✓Duplex ultrasound or other imaging confirming femoral vein thrombosis
✓Laterality documentation — bilateral side confirmed
✓Distinction between acute, subacute, and chronic thrombosis
✓Assessment for concurrent pulmonary embolism
✓Anticoagulation therapy plan with specific agent, dose, and duration
✓Evaluation of underlying risk factors (immobility, malignancy, thrombophilia, surgery)
✓Follow-up imaging plan if applicable

Commonly Confused Codes

•I82.4x: Deep vein thrombosis of femoral vein: acute embolism and thrombosis codes; verify correct code series
•I80.0: Phlebitis and thrombophlebitis of superficial vessels of lower extremities: superficial, not deep
•I80.20x: Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremity: less specific than femoral
•I26.x: Pulmonary embolism: code additionally if pulmonary embolism is documented