What is ICD-10 code I80.292?

I80.292 is the ICD-10-CM diagnosis code for Phlebitis and thrombophlebitis of other deep vessels of left lower extremity. Inflammation and blood clot formation in other deep veins of the left lower leg beyond the calf muscle area. I80.292 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. I80.292 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. I80.292 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. I80.292 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 I80.292?

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 I80.292, 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 I80.292?

Verify left laterality is documented; this code is specific to the left lower extremity Document the specific deep vessel involved (popliteal, femoral, etc.) to support medical necessity and treatment decisions Because I80.292 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 I80.292: Phlebitis

ICD-10-CM Code View

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Code lookupI80.292Effective 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)

I80.292

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

Phlebitis and thrombophlebitis of other deep vessels of left lower extremity

Inflammation and blood clot formation in other deep veins of the left lower leg beyond the calf muscle area.

Buddy Insight

Deep vein thrombophlebitis of the lower extremity involves both inflammation and clot formation in the deep venous system, carrying risk of clot propagation and 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

I80.2Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities

I80.29Phlebitis and thrombophlebitis of other deep vessels of lower extremities

I80.292Phlebitis and thrombophlebitis of other deep vessels of left lower extremity

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for I80.292 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for I80.292 in this effective period.

Related Child Codes

Official

I80.291Phlebitis and thrombophlebitis of other deep vessels of right lower extremity

I80.293Phlebitis and thrombophlebitis of other deep vessels of lower extremity, bilateral

I80.299Phlebitis and thrombophlebitis of other deep vessels of unspecified lower extremity

Includes

Official

ICD-10-CM does not list Includes notes for I80.292 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for I80.292 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for I80.292 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for I80.292 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for I80.292 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Clinical diagnosis of venous thrombosis or thrombophlebitis clearly documented by the treating provider

Diagnostic confirmation via duplex ultrasonography, CT venography, MR venography, or venography with imaging findings described

Current treatment plan including anticoagulation regimen with specific medication, dose, and duration

Laterality (right or left) clearly specified in provider documentation

MEAT Support

HCC Buddy guidance

Clinical diagnosis of venous thrombosis or thrombophlebitis clearly documented by the treating provider

Diagnostic confirmation via duplex ultrasonography, CT venography, MR venography, or venography with imaging findings described

Current treatment plan including anticoagulation regimen with specific medication, dose, and duration

Laterality (right or left) clearly specified in provider documentation

Audit Caution

HCC Buddy guidance

Confusing deep vein thrombophlebitis (I80.2x) with superficial thrombophlebitis (I80.0x); the clinical significance and treatment differ markedly

Failing to distinguish phlebitis/thrombophlebitis codes (I80 category) from pure embolism/thrombosis codes (I82 category); phlebitis implies an inflammatory component

Assigning the left-sided code when the documentation actually indicates right-sided or bilateral involvement; always verify laterality against imaging and clinical notes

Failing to assign a separate code for pulmonary embolism (I26.-) when documented as a complication of the deep vein thrombosis

Common Mistakes

HCC Buddy guidance

I80.10-I80.13 — Phlebitis of femoral vein; use when specifically the femoral vein is involved rather than other deep calf vessels

I80.20-I80.209 — Phlebitis of unspecified deep vessels; less specific codes that do not identify the particular deep vein involved

I82.40x-I82.4Zx — Acute embolism and thrombosis of deep veins of lower extremity; use for acute DVT without the inflammatory phlebitis component

I80.0- — Phlebitis of superficial vessels of lower extremities; use for superficial vein involvement rather than deep veins

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 I80.292 an HCC code?

Yes. I80.292 (Phlebitis and thrombophlebitis of other deep vessels of left lower extremity) 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: I80.292 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: I80.292
Description: Phlebitis and thrombophlebitis of other deep vessels of left lower extremity
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 I80.292 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for I80.292

For I80.292 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 I80.292 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

I80.292 is the ICD-10-CM diagnosis code for phlebitis and thrombophlebitis of other deep vessels of left lower extremity. Inflammation and blood clot formation in other deep veins of the left lower leg beyond the calf muscle area. I80.292 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, I80.292 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, I80.292 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.

Verify left laterality is documented; this code is specific to the left lower extremity. Because I80.292 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 I80.292 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Verify left laterality is documented; this code is specific to the left lower extremity
•Document the specific deep vessel involved (popliteal, femoral, etc.) to support medical necessity and treatment decisions

Clinical Significance

Deep vein thrombophlebitis of the lower extremity involves both inflammation and clot formation in the deep venous system, carrying risk of clot propagation and pulmonary embolism. This condition requires anticoagulation therapy and ongoing vascular monitoring, reflecting significant resource utilization. Accurate coding is essential for risk adjustment as it indicates chronic vascular disease burden requiring sustained medical management.

Documentation Requirements

✓Clinical diagnosis of venous thrombosis or thrombophlebitis clearly documented by the treating provider
✓Diagnostic confirmation via duplex ultrasonography, CT venography, MR venography, or venography with imaging findings described
✓Current treatment plan including anticoagulation regimen with specific medication, dose, and duration
✓Laterality (right or left) clearly specified in provider documentation
✓Documentation distinguishing deep vein thrombophlebitis from superficial thrombophlebitis
✓Assessment of risk factors (immobility, recent surgery, malignancy, hypercoagulable state, oral contraceptive use)

Commonly Confused Codes

•I80.10-I80.13: Phlebitis of femoral vein; use when specifically the femoral vein is involved rather than other deep calf vessels
•I80.20-I80.209: Phlebitis of unspecified deep vessels; less specific codes that do not identify the particular deep vein involved
•I82.40x-I82.4Zx: Acute embolism and thrombosis of deep veins of lower extremity; use for acute DVT without the inflammatory phlebitis component
•I80.0-: Phlebitis of superficial vessels of lower extremities; use for superficial vein involvement rather than deep veins
•I87.01x: Postthrombotic syndrome; use for chronic sequelae of prior DVT, not active thrombophlebitis