I00-I99886 V28 risk-adjusting codes
Diseases of the circulatory system
ICD-10-CM Chapter 9 (I00-I99) in the FY2026 code set. 886 codes in this chapter map to a CMS-HCC V28 payment category, across 22 HCC categories.
CMS-HCC V28 categories in this chapter (22)
Open any category for its full member-code list, RAF, and hierarchy.
- HCC 267 Deep Vein Thrombosis and Pulmonary Embolism165
- HCC 383 Chronic Ulcer of Skin, Except Pressure, Not Specified as Through to Bone or Muscle148
- HCC 263 Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene122
- HCC 254 Monoplegia, Other Paralytic Syndromes96
- HCC 249 Ischemic or Unspecified Stroke91
- HCC 264 Vascular Disease with Complications71
- HCC 226 Heart Failure, Except End Stage and Acute34
- HCC 248 Intracranial Hemorrhage33
- HCC 253 Hemiplegia/Hemiparesis30
- HCC 229 Unstable Angina and Other Acute Ischemic Heart Disease25
- HCC 228 Acute Myocardial Infarction18
- HCC 238 Specified Heart Arrhythmias17
- HCC 227 Cardiomyopathy/Myocarditis12
- HCC 213 Cardio-Respiratory Failure and Shock5
- HCC 225 Acute Heart Failure (Excludes Acute on Chronic)5
- HCC 63 Chronic Liver Failure/End-Stage Liver Disorders4
- HCC 326 Chronic Kidney Disease, Stage 53
- HCC 224 Acute on Chronic Heart Failure3
- HCC 17 Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic1
- HCC 222 End Stage Heart Failure1
- HCC 127 Dementia, Mild or Unspecified1
- HCC 93 Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders1
Risk-adjusting ICD-10-CM codes (showing 300 of 886)
Codes in this chapter that map to a CMS-HCC V28 payment category. Open any code for its full detail.
- I09.81Rheumatic heart failure
- I11.0Hypertensive heart disease with heart failure
- I12.0Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease
- I13.0Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- I13.11Hypertensive heart and chronic kidney disease without heart failure, with stage 5 chronic kidney disease, or end stage renal disease
- I13.2Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease
- I13.2Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease
- I20.0Unstable angina
- I21.01ST elevation (STEMI) myocardial infarction involving left main coronary artery
- I21.02ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
- I21.09ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
- I21.11ST elevation (STEMI) myocardial infarction involving right coronary artery
- I21.19ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
- I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
- I21.29ST elevation (STEMI) myocardial infarction involving other sites
- I21.3ST elevation (STEMI) myocardial infarction of unspecified site
- I21.4Non-ST elevation (NSTEMI) myocardial infarction
- I21.9Acute myocardial infarction, unspecified
- I21.A1Myocardial infarction type 2
- I21.A9Other myocardial infarction type
- I21.BMyocardial infarction with coronary microvascular dysfunction
- I22.0Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
- I22.1Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
- I22.2Subsequent non-ST elevation (NSTEMI) myocardial infarction
- I22.8Subsequent ST elevation (STEMI) myocardial infarction of other sites
- I22.9Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
- I23.0Hemopericardium as current complication following acute myocardial infarction
- I23.1Atrial septal defect as current complication following acute myocardial infarction
- I23.2Ventricular septal defect as current complication following acute myocardial infarction
- I23.3Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
- I23.4Rupture of chordae tendineae as current complication following acute myocardial infarction
- I23.5Rupture of papillary muscle as current complication following acute myocardial infarction
- I23.6Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
- I23.7Postinfarction angina
- I23.8Other current complications following acute myocardial infarction
- I24.0Acute coronary thrombosis not resulting in myocardial infarction
- I24.1Dressler's syndrome
- I24.81Acute coronary microvascular dysfunction
- I24.89Other forms of acute ischemic heart disease
- I24.9Acute ischemic heart disease, unspecified
- I25.110Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
- I25.700Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris
- I25.710Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris
- I25.720Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris
- I25.730Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris
- I25.750Atherosclerosis of native coronary artery of transplanted heart with unstable angina
- I25.760Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina
- I25.790Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris
- I26.01Septic pulmonary embolism with acute cor pulmonale
- I26.02Saddle embolus of pulmonary artery with acute cor pulmonale
- I26.03Cement embolism of pulmonary artery with acute cor pulmonale
- I26.04Fat embolism of pulmonary artery with acute cor pulmonale
- I26.09Other pulmonary embolism with acute cor pulmonale
- I26.90Septic pulmonary embolism without acute cor pulmonale
- I26.92Saddle embolus of pulmonary artery without acute cor pulmonale
- I26.93Single subsegmental thrombotic pulmonary embolism without acute cor pulmonale
- I26.94Multiple subsegmental thrombotic pulmonary emboli without acute cor pulmonale
- I26.95Cement embolism of pulmonary artery without acute cor pulmonale
- I26.96Fat embolism of pulmonary artery without acute cor pulmonale
- I26.99Other pulmonary embolism without acute cor pulmonale
- I27.0Primary pulmonary hypertension
- I27.1Kyphoscoliotic heart disease
- I27.20Pulmonary hypertension, unspecified
- I27.21Secondary pulmonary arterial hypertension
- I27.22Pulmonary hypertension due to left heart disease
- I27.23Pulmonary hypertension due to lung diseases and hypoxia
- I27.24Chronic thromboembolic pulmonary hypertension
- I27.29Other secondary pulmonary hypertension
- I27.81Cor pulmonale (chronic)
- I27.82Chronic pulmonary embolism
- I27.83Eisenmenger's syndrome
- I27.89Other specified pulmonary heart diseases
- I27.9Pulmonary heart disease, unspecified
- I28.0Arteriovenous fistula of pulmonary vessels
- I28.1Aneurysm of pulmonary artery
- I28.8Other diseases of pulmonary vessels
- I28.9Disease of pulmonary vessels, unspecified
- I31.31Malignant pericardial effusion in diseases classified elsewhere
- I42.0Dilated cardiomyopathy
- I42.1Obstructive hypertrophic cardiomyopathy
- I42.2Other hypertrophic cardiomyopathy
- I42.3Endomyocardial (eosinophilic) disease
- I42.4Endocardial fibroelastosis
- I42.5Other restrictive cardiomyopathy
- I42.6Alcoholic cardiomyopathy
- I42.8Other cardiomyopathies
- I42.9Cardiomyopathy, unspecified
- I43Cardiomyopathy in diseases classified elsewhere
- I44.2Atrioventricular block, complete
- I46.2Cardiac arrest due to underlying cardiac condition
- I46.8Cardiac arrest due to other underlying condition
- I46.9Cardiac arrest, cause unspecified
- I47.0Re-entry ventricular arrhythmia
- I47.20Ventricular tachycardia, unspecified
- I47.21Torsades de pointes
- I47.29Other ventricular tachycardia
- I47.9Paroxysmal tachycardia, unspecified
- I48.0Paroxysmal atrial fibrillation
- I48.11Longstanding persistent atrial fibrillation
- I48.19Other persistent atrial fibrillation
- I48.20Chronic atrial fibrillation, unspecified
- I48.21Permanent atrial fibrillation
- I48.3Typical atrial flutter
- I48.4Atypical atrial flutter
- I48.91Unspecified atrial fibrillation
- I48.92Unspecified atrial flutter
- I49.01Ventricular fibrillation
- I49.02Ventricular flutter
- I49.2Junctional premature depolarization
- I49.5Sick sinus syndrome
- I50.1Left ventricular failure, unspecified
- I50.20Unspecified systolic (congestive) heart failure
- I50.21Acute systolic (congestive) heart failure
- I50.22Chronic systolic (congestive) heart failure
- I50.23Acute on chronic systolic (congestive) heart failure
- I50.30Unspecified diastolic (congestive) heart failure
- I50.31Acute diastolic (congestive) heart failure
- I50.32Chronic diastolic (congestive) heart failure
- I50.33Acute on chronic diastolic (congestive) heart failure
- I50.40Unspecified combined systolic (congestive) and diastolic (congestive) heart failure
- I50.41Acute combined systolic (congestive) and diastolic (congestive) heart failure
- I50.42Chronic combined systolic (congestive) and diastolic (congestive) heart failure
- I50.43Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure
- I50.810Right heart failure, unspecified
- I50.811Acute right heart failure
- I50.812Chronic right heart failure
- I50.813Acute on chronic right heart failure
- I50.814Right heart failure due to left heart failure
- I50.82Biventricular heart failure
- I50.83High output heart failure
- I50.84End stage heart failure
- I50.89Other heart failure
- I50.9Heart failure, unspecified
- I51.1Rupture of chordae tendineae, not elsewhere classified
- I51.2Rupture of papillary muscle, not elsewhere classified
- I51.4Myocarditis, unspecified
- I51.5Myocardial degeneration
- I60.00Nontraumatic subarachnoid hemorrhage from unspecified carotid siphon and bifurcation
- I60.01Nontraumatic subarachnoid hemorrhage from right carotid siphon and bifurcation
- I60.02Nontraumatic subarachnoid hemorrhage from left carotid siphon and bifurcation
- I60.10Nontraumatic subarachnoid hemorrhage from unspecified middle cerebral artery
- I60.11Nontraumatic subarachnoid hemorrhage from right middle cerebral artery
- I60.12Nontraumatic subarachnoid hemorrhage from left middle cerebral artery
- I60.2Nontraumatic subarachnoid hemorrhage from anterior communicating artery
- I60.30Nontraumatic subarachnoid hemorrhage from unspecified posterior communicating artery
- I60.31Nontraumatic subarachnoid hemorrhage from right posterior communicating artery
- I60.32Nontraumatic subarachnoid hemorrhage from left posterior communicating artery
- I60.4Nontraumatic subarachnoid hemorrhage from basilar artery
- I60.50Nontraumatic subarachnoid hemorrhage from unspecified vertebral artery
- I60.51Nontraumatic subarachnoid hemorrhage from right vertebral artery
- I60.52Nontraumatic subarachnoid hemorrhage from left vertebral artery
- I60.6Nontraumatic subarachnoid hemorrhage from other intracranial arteries
- I60.7Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- I60.8Other nontraumatic subarachnoid hemorrhage
- I60.9Nontraumatic subarachnoid hemorrhage, unspecified
- I61.0Nontraumatic intracerebral hemorrhage in hemisphere, subcortical
- I61.1Nontraumatic intracerebral hemorrhage in hemisphere, cortical
- I61.2Nontraumatic intracerebral hemorrhage in hemisphere, unspecified
- I61.3Nontraumatic intracerebral hemorrhage in brain stem
- I61.4Nontraumatic intracerebral hemorrhage in cerebellum
- I61.5Nontraumatic intracerebral hemorrhage, intraventricular
- I61.6Nontraumatic intracerebral hemorrhage, multiple localized
- I61.8Other nontraumatic intracerebral hemorrhage
- I61.9Nontraumatic intracerebral hemorrhage, unspecified
- I62.00Nontraumatic subdural hemorrhage, unspecified
- I62.01Nontraumatic acute subdural hemorrhage
- I62.02Nontraumatic subacute subdural hemorrhage
- I62.03Nontraumatic chronic subdural hemorrhage
- I62.1Nontraumatic extradural hemorrhage
- I62.9Nontraumatic intracranial hemorrhage, unspecified
- I63.00Cerebral infarction due to thrombosis of unspecified precerebral artery
- I63.011Cerebral infarction due to thrombosis of right vertebral artery
- I63.012Cerebral infarction due to thrombosis of left vertebral artery
- I63.013Cerebral infarction due to thrombosis of bilateral vertebral arteries
- I63.019Cerebral infarction due to thrombosis of unspecified vertebral artery
- I63.02Cerebral infarction due to thrombosis of basilar artery
- I63.031Cerebral infarction due to thrombosis of right carotid artery
- I63.032Cerebral infarction due to thrombosis of left carotid artery
- I63.033Cerebral infarction due to thrombosis of bilateral carotid arteries
- I63.039Cerebral infarction due to thrombosis of unspecified carotid artery
- I63.09Cerebral infarction due to thrombosis of other precerebral artery
- I63.10Cerebral infarction due to embolism of unspecified precerebral artery
- I63.111Cerebral infarction due to embolism of right vertebral artery
- I63.112Cerebral infarction due to embolism of left vertebral artery
- I63.113Cerebral infarction due to embolism of bilateral vertebral arteries
- I63.119Cerebral infarction due to embolism of unspecified vertebral artery
- I63.12Cerebral infarction due to embolism of basilar artery
- I63.131Cerebral infarction due to embolism of right carotid artery
- I63.132Cerebral infarction due to embolism of left carotid artery
- I63.133Cerebral infarction due to embolism of bilateral carotid arteries
- I63.139Cerebral infarction due to embolism of unspecified carotid artery
- I63.19Cerebral infarction due to embolism of other precerebral artery
- I63.20Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries
- I63.211Cerebral infarction due to unspecified occlusion or stenosis of right vertebral artery
- I63.212Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery
- I63.213Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries
- I63.219Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery
- I63.22Cerebral infarction due to unspecified occlusion or stenosis of basilar artery
- I63.231Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries
- I63.232Cerebral infarction due to unspecified occlusion or stenosis of left carotid arteries
- I63.233Cerebral infarction due to unspecified occlusion or stenosis of bilateral carotid arteries
- I63.239Cerebral infarction due to unspecified occlusion or stenosis of unspecified carotid artery
- I63.29Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries
- I63.30Cerebral infarction due to thrombosis of unspecified cerebral artery
- I63.311Cerebral infarction due to thrombosis of right middle cerebral artery
- I63.312Cerebral infarction due to thrombosis of left middle cerebral artery
- I63.313Cerebral infarction due to thrombosis of bilateral middle cerebral arteries
- I63.319Cerebral infarction due to thrombosis of unspecified middle cerebral artery
- I63.321Cerebral infarction due to thrombosis of right anterior cerebral artery
- I63.322Cerebral infarction due to thrombosis of left anterior cerebral artery
- I63.323Cerebral infarction due to thrombosis of bilateral anterior cerebral arteries
- I63.329Cerebral infarction due to thrombosis of unspecified anterior cerebral artery
- I63.331Cerebral infarction due to thrombosis of right posterior cerebral artery
- I63.332Cerebral infarction due to thrombosis of left posterior cerebral artery
- I63.333Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries
- I63.339Cerebral infarction due to thrombosis of unspecified posterior cerebral artery
- I63.341Cerebral infarction due to thrombosis of right cerebellar artery
- I63.342Cerebral infarction due to thrombosis of left cerebellar artery
- I63.343Cerebral infarction due to thrombosis of bilateral cerebellar arteries
- I63.349Cerebral infarction due to thrombosis of unspecified cerebellar artery
- I63.39Cerebral infarction due to thrombosis of other cerebral artery
- I63.40Cerebral infarction due to embolism of unspecified cerebral artery
- I63.411Cerebral infarction due to embolism of right middle cerebral artery
- I63.412Cerebral infarction due to embolism of left middle cerebral artery
- I63.413Cerebral infarction due to embolism of bilateral middle cerebral arteries
- I63.419Cerebral infarction due to embolism of unspecified middle cerebral artery
- I63.421Cerebral infarction due to embolism of right anterior cerebral artery
- I63.422Cerebral infarction due to embolism of left anterior cerebral artery
- I63.423Cerebral infarction due to embolism of bilateral anterior cerebral arteries
- I63.429Cerebral infarction due to embolism of unspecified anterior cerebral artery
- I63.431Cerebral infarction due to embolism of right posterior cerebral artery
- I63.432Cerebral infarction due to embolism of left posterior cerebral artery
- I63.433Cerebral infarction due to embolism of bilateral posterior cerebral arteries
- I63.439Cerebral infarction due to embolism of unspecified posterior cerebral artery
- I63.441Cerebral infarction due to embolism of right cerebellar artery
- I63.442Cerebral infarction due to embolism of left cerebellar artery
- I63.443Cerebral infarction due to embolism of bilateral cerebellar arteries
- I63.449Cerebral infarction due to embolism of unspecified cerebellar artery
- I63.49Cerebral infarction due to embolism of other cerebral artery
- I63.50Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery
- I63.511Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery
- I63.512Cerebral infarction due to unspecified occlusion or stenosis of left middle cerebral artery
- I63.513Cerebral infarction due to unspecified occlusion or stenosis of bilateral middle cerebral arteries
- I63.519Cerebral infarction due to unspecified occlusion or stenosis of unspecified middle cerebral artery
- I63.521Cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery
- I63.522Cerebral infarction due to unspecified occlusion or stenosis of left anterior cerebral artery
- I63.523Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries
- I63.529Cerebral infarction due to unspecified occlusion or stenosis of unspecified anterior cerebral artery
- I63.531Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery
- I63.532Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery
- I63.533Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries
- I63.539Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery
- I63.541Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery
- I63.542Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery
- I63.543Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries
- I63.549Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery
- I63.59Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery
- I63.6Cerebral infarction due to cerebral venous thrombosis, nonpyogenic
- I63.81Other cerebral infarction due to occlusion or stenosis of small artery
- I63.89Other cerebral infarction
- I63.9Cerebral infarction, unspecified
- I67.3Progressive vascular leukoencephalopathy
- I69.031Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting right dominant side
- I69.032Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting left dominant side
- I69.033Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting right non-dominant side
- I69.034Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting left non-dominant side
- I69.039Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting unspecified side
- I69.041Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting right dominant side
- I69.042Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting left dominant side
- I69.043Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting right non-dominant side
- I69.044Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting left non-dominant side
- I69.049Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting unspecified side
- I69.051Hemiplegia and hemiparesis following nontraumatic subarachnoid hemorrhage affecting right dominant side
- I69.052Hemiplegia and hemiparesis following nontraumatic subarachnoid hemorrhage affecting left dominant side
- I69.053Hemiplegia and hemiparesis following nontraumatic subarachnoid hemorrhage affecting right non-dominant side
- I69.054Hemiplegia and hemiparesis following nontraumatic subarachnoid hemorrhage affecting left non-dominant side
- I69.059Hemiplegia and hemiparesis following nontraumatic subarachnoid hemorrhage affecting unspecified side
- I69.061Other paralytic syndrome following nontraumatic subarachnoid hemorrhage affecting right dominant side
- I69.062Other paralytic syndrome following nontraumatic subarachnoid hemorrhage affecting left dominant side
- I69.063Other paralytic syndrome following nontraumatic subarachnoid hemorrhage affecting right non-dominant side
- I69.064Other paralytic syndrome following nontraumatic subarachnoid hemorrhage affecting left non-dominant side
- I69.065Other paralytic syndrome following nontraumatic subarachnoid hemorrhage, bilateral
- I69.069Other paralytic syndrome following nontraumatic subarachnoid hemorrhage affecting unspecified side
- I69.131Monoplegia of upper limb following nontraumatic intracerebral hemorrhage affecting right dominant side
- I69.132Monoplegia of upper limb following nontraumatic intracerebral hemorrhage affecting left dominant side
- I69.133Monoplegia of upper limb following nontraumatic intracerebral hemorrhage affecting right non-dominant side
- I69.134Monoplegia of upper limb following nontraumatic intracerebral hemorrhage affecting left non-dominant side
- I69.139Monoplegia of upper limb following nontraumatic intracerebral hemorrhage affecting unspecified side
- I69.141Monoplegia of lower limb following nontraumatic intracerebral hemorrhage affecting right dominant side
- I69.142Monoplegia of lower limb following nontraumatic intracerebral hemorrhage affecting left dominant side
- I69.143Monoplegia of lower limb following nontraumatic intracerebral hemorrhage affecting right non-dominant side
- I69.144Monoplegia of lower limb following nontraumatic intracerebral hemorrhage affecting left non-dominant side
- I69.149Monoplegia of lower limb following nontraumatic intracerebral hemorrhage affecting unspecified side
- I69.151Hemiplegia and hemiparesis following nontraumatic intracerebral hemorrhage affecting right dominant side
- I69.152Hemiplegia and hemiparesis following nontraumatic intracerebral hemorrhage affecting left dominant side
- I69.153Hemiplegia and hemiparesis following nontraumatic intracerebral hemorrhage affecting right non-dominant side
- I69.154Hemiplegia and hemiparesis following nontraumatic intracerebral hemorrhage affecting left non-dominant side
- I69.159Hemiplegia and hemiparesis following nontraumatic intracerebral hemorrhage affecting unspecified side
- I69.161Other paralytic syndrome following nontraumatic intracerebral hemorrhage affecting right dominant side
- I69.162Other paralytic syndrome following nontraumatic intracerebral hemorrhage affecting left dominant side
Frequently asked questions
How many ICD-10-CM codes in Diseases of the circulatory system risk-adjust under CMS-HCC V28?
886 ICD-10-CM codes in the I00-I99 chapter (Diseases of the circulatory system) map to a CMS-HCC V28 payment category for payment year 2026.
Which CMS-HCC V28 categories do I00-I99 codes map to?
Codes in this chapter map to 22 distinct CMS-HCC V28 categories, most commonly HCC 267 (Deep Vein Thrombosis and Pulmonary Embolism), HCC 383 (Chronic Ulcer of Skin, Except Pressure, Not Specified as Through to Bone or Muscle), HCC 263 (Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene).
What ICD-10-CM chapter is I00-I99?
I00-I99 is ICD-10-CM Chapter 9, Diseases of the circulatory system, in the FY2026 code set.
Source: FY2026 ICD-10-CM Tabular (CDC/NCHS) and the CMS-HCC v28 PY2026 mapping file.