What is ICD-10 code I82.C11?

I82.C11 is the ICD-10-CM diagnosis code for Acute embolism and thrombosis of right internal jugular vein. A sudden blood clot in the right internal jugular vein (a major vein in the neck) that requires immediate attention. I82.C11 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. I82.C11 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. I82.C11 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. I82.C11 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.

Which HCC does I82.C11 map to under V28?

I82.C11 maps to CMS-HCC V28 HCC 267 (Deep Vein Thrombosis and Pulmonary Embolism). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

2026 ICD-10-CM I82.C11: Acute embolism

I82.C11 maps to CMS-HCC V28 267. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC Buddy coding tools

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Code lookupI82.C11

Effective 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)

I82.C11

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

Acute embolism and thrombosis of right internal jugular vein

A sudden blood clot in the right internal jugular vein (a major vein in the neck) that requires immediate attention.

Buddy Insight

Acute internal jugular vein thrombosis represents a significant vascular event that can lead to pulmonary embolism, post-thrombotic syndrome, and recurrent venous thromboembolism.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

Mapped

HCC 267

Deep Vein Thrombosis and Pulm...

Code-level coefficient reference

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

Mapped

HCC 156

HHS-HCC 156 adult, RAF varies...

Code-level coefficient reference

ESRD/PACE

Mapped

HCC 108

Vascular Disease

Code-level coefficient reference

RXHCC

Mapped

HCC 215

Venous Thromboembolism

Code-level coefficient reference

Code Book Path

Official

I82.CEmbolism and thrombosis of internal jugular vein I82.C1Acute embolism and thrombosis of internal jugular vein I82.C11Acute embolism and thrombosis of right internal jugular vein

Inclusion Terms

Official

No inclusion terms are included in this display for I82.C11. Check the code and parent instructions in the Code Book.

Excludes 2

Official

certain conditions originating in the perinatal period (P04-P96)Inherited from I00-I99, I82
certain infectious and parasitic diseases (A00-B99)Inherited from I00-I99, I82
complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from I00-I99, I82
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from I00-I99, I82
endocrine, nutritional and metabolic diseases (E00-E88)Inherited from I00-I99, I82
injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from I00-I99, I82
neoplasms (C00-D49)Inherited from I00-I99, I82
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from I00-I99, I82
systemic connective tissue disorders (M30-M36)Inherited from I00-I99, I82
transient cerebral ischemic attacks and related syndromes (G45.-)Inherited from I00-I99, I82
venous embolism and thrombosis (of):Inherited from I00-I99, I82
cerebral (I63.6, I67.6)Inherited from I00-I99, I82
coronary (I21-I25)Inherited from I00-I99, I82
intracranial and intraspinal, septic or NOS (G08)Inherited from I00-I99, I82
intracranial, nonpyogenic (I67.6)Inherited from I00-I99, I82
intraspinal, nonpyogenic (G95.1)Inherited from I00-I99, I82
mesenteric (K55.0-)Inherited from I00-I99, I82
portal (I81)Inherited from I00-I99, I82
pulmonary (I26.-)Inherited from I00-I99, I82

Related Codes

Official

I82.C12Acute embolism and thrombosis of left internal jugular vein I82.C13Acute embolism and thrombosis of internal jugular vein, bilateral I82.C19Acute embolism and thrombosis of unspecified internal jugular vein

Includes

Official

No Includes notes are included in this display for I82.C11. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for I82.C11. Check the code and parent instructions in the Code Book.

Code First

Official

venous embolism and thrombosis complicating:Inherited from I82
abortion, ectopic or molar pregnancy (O00-O07, O08.7)Inherited from I82
pregnancy, childbirth and the puerperium (O22.-, O87.-)Inherited from I82

Use Additional

Official

No Use Additional Code instructions are included in this display for I82.C11. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for I82.C11. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Provider documentation explicitly stating acute embolism or thrombosis of the internal jugular vein

Laterality must be documented (right side) — do not assume from context

Clinical findings supporting the diagnosis (e.g., swelling, pain, imaging results such as duplex ultrasound or CT venography)

Current treatment plan including anticoagulation therapy type, duration, and monitoring parameters

MEAT Support

HCC Buddy guidance

Provider documentation explicitly stating acute embolism or thrombosis of the internal jugular vein

Laterality must be documented (right side) — do not assume from context

Clinical findings supporting the diagnosis (e.g., swelling, pain, imaging results such as duplex ultrasound or CT venography)

Current treatment plan including anticoagulation therapy type, duration, and monitoring parameters

Audit Caution

HCC Buddy guidance

Coding acute when the documentation actually supports chronic presentation — always verify the acuity from the clinical note

Confusing the internal jugular vein with adjacent veins (e.g., subclavian) — verify the exact vessel documented

Failing to code the underlying etiology when documented (e.g., malignancy, central venous catheter, thoracic outlet syndrome)

Not updating the code from acute to chronic on subsequent encounters when the thrombosis has evolved past the acute phase

Common Mistakes

HCC Buddy guidance

I82.C21 — Chronic (not acute) embolism and thrombosis of the right internal jugular vein; use for long-standing clots

I82.B11 — Acute embolism and thrombosis of the right subclavian vein; different vessel near the collarbone

I63.x — Cerebral infarction; jugular thrombosis may be confused with cerebrovascular conditions but these are distinct diagnoses

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 I82.C11 an HCC code?

Yes. I82.C11 (Acute embolism and thrombosis of right internal jugular vein) maps to HCC 267, Deep Vein Thrombosis and Pulmonary Embolism under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.294. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: I82.C11 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: I82.C11
Description: Acute embolism and thrombosis of right internal jugular vein
HCC (V28): HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism
RAF reference coefficient: 0.294
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 267, Deep Vein Thrombosis and Pulmonary Embolism

0.294

ESRDHCC 108, Vascular Disease

Not separately weighted

RxHCCHCC 215, Venous Thromboembolism

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. 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 context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work I82.C11 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for I82.C11

For I82.C11, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

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

Coder workflow notes

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What This Code Means

I82.C11 is the ICD-10-CM diagnosis code for acute embolism and thrombosis of right internal jugular vein. A sudden blood clot in the right internal jugular vein (a major vein in the neck) that requires immediate attention. I82.C11 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, I82.C11 maps to Deep Vein Thrombosis and Pulmonary Embolism (HCC 267) with a source-labeled community, non-dual, aged reference coefficient of 0.294. No V24 mapping is shown for I82.C11; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Ensure documentation clearly indicates 'acute' onset and right-sided location. For I82.C11, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. 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, source-labeled coefficient references, and MEAT documentation criteria for I82.C11 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Ensure documentation clearly indicates 'acute' onset and right-sided location
•Distinguish from chronic thrombosis codes (I82.C22) which have different treatment implications

Clinical Significance

Acute internal jugular vein thrombosis represents a significant vascular event that can lead to pulmonary embolism, post-thrombotic syndrome, and recurrent venous thromboembolism. This diagnosis is critical for risk adjustment as it reflects active vascular disease requiring anticoagulation therapy, monitoring, and potentially invasive interventions. Accurate capture ensures appropriate resource allocation for ongoing management and complication prevention.

Documentation Requirements

✓Provider documentation explicitly stating acute embolism or thrombosis of the internal jugular vein
✓Laterality must be documented (right side) — do not assume from context
✓Clinical findings supporting the diagnosis (e.g., swelling, pain, imaging results such as duplex ultrasound or CT venography)
✓Current treatment plan including anticoagulation therapy type, duration, and monitoring parameters
✓Date of onset or timeframe establishing the acute nature of the condition
✓Any precipitating factors (central line placement, surgery, malignancy, hypercoagulable state)

Commonly Confused Codes

•I82.C21: Chronic (not acute) embolism and thrombosis of the right internal jugular vein; use for long-standing clots
•I82.B11: Acute embolism and thrombosis of the right subclavian vein; different vessel near the collarbone
•I63.x: Cerebral infarction; jugular thrombosis may be confused with cerebrovascular conditions but these are distinct diagnoses