ICD↔CPT crosswalk
CPT Q9955: ICD-10 codes that support medical necessity
These ICD-10-CM diagnoses support medical necessity for CPT Q9955 under Medicare coverage policies (LCDs, NCDs, and Billing & Coding articles). Billing CPT Q9955 with a diagnosis that isn't covered typically denies as CARC 50 — not medically necessary.
National approximation. Coverage varies by MAC and state — confirm against the specific LCD/NCD and article that applies to your jurisdiction and date of service.
| ICD-10 | Description |
|---|---|
| A18.84 | Tuberculosis of heart |
| A36.81 | Diphtheritic cardiomyopathy |
| A39.53 | Meningococcal pericarditis |
| A40.0 | Sepsis due to streptococcus, group A |
| A40.1 | Sepsis due to streptococcus, group B |
| A40.3 | Sepsis due to Streptococcus pneumoniae |
| A40.8 | Other streptococcal sepsis |
| A40.9 | Streptococcal sepsis, unspecified |
| A41.01 | Sepsis due to Methicillin susceptible Staphylococcus aureus |
| A41.02 | Sepsis due to Methicillin resistant Staphylococcus aureus |
| A41.1 | Sepsis due to other specified staphylococcus |
| A41.2 | Sepsis due to unspecified staphylococcus |
| A41.3 | Sepsis due to Hemophilus influenzae |
| A41.4 | Sepsis due to anaerobes |
| A41.50 | Gram-negative sepsis, unspecified |
| A41.51 | Sepsis due to Escherichia coli [E. coli] |
| A41.52 | Sepsis due to Pseudomonas |
| A41.53 | Sepsis due to Serratia |
| A41.54 | Sepsis due to Acinetobacter baumannii |
| A41.59 | Other Gram-negative sepsis |
| A41.81 | Sepsis due to Enterococcus |
| A41.89 | Other specified sepsis |
| A41.9 | Sepsis, unspecified organism |
| A42.7 | Actinomycotic sepsis |
| A52.01 | Syphilitic aneurysm of aorta |
| A52.02 | Syphilitic aortitis |
| A52.03 | Syphilitic endocarditis |
| A52.06 | Other syphilitic heart involvement |
| A54.83 | Gonococcal heart infection |
| A69.20 | Lyme disease, unspecified |
| A69.21 | Meningitis due to Lyme disease |
| A69.22 | Other neurologic disorders in Lyme disease |
| A69.23 | Arthritis due to Lyme disease |
| A69.29 | Other conditions associated with Lyme disease |
| B33.20 | Viral carditis, unspecified |
| B33.21 | Viral endocarditis |
| B33.22 | Viral myocarditis |
| B33.23 | Viral pericarditis |
| B37.6 | Candidal endocarditis |
| B39.4 | Histoplasmosis capsulati, unspecified |
| B39.5 | Histoplasmosis duboisii |
| B57.0 | Acute Chagas' disease with heart involvement |
| B57.2 | Chagas' disease (chronic) with heart involvement |
| B58.81 | Toxoplasma myocarditis |
| B95.61 | Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere |
| B95.62 | Methicillin resistant Staphylococcus aureus infection as the cause of diseases classified elsewhere |
| B95.7 | Other staphylococcus as the cause of diseases classified elsewhere |
| B95.8 | Unspecified staphylococcus as the cause of diseases classified elsewhere |
| C38.0 | Malignant neoplasm of heart |
| C45.2 | Mesothelioma of pericardium |
| C79.89 | Secondary malignant neoplasm of other specified sites |
| C79.9 | Secondary malignant neoplasm of unspecified site |
| D15.1 | Benign neoplasm of heart |
| D48.7 | Neoplasm of uncertain behavior of other specified sites |
| D48.9 | Neoplasm of uncertain behavior, unspecified |
| D49.81 | Neoplasm of unspecified behavior of retina and choroid |
| D49.89 | Neoplasm of unspecified behavior of other specified sites |
| D82.1 | Di George's syndrome |
| D86.0 | Sarcoidosis of lung |
| D86.1 | Sarcoidosis of lymph nodes |
| D86.2 | Sarcoidosis of lung with sarcoidosis of lymph nodes |
| D86.3 | Sarcoidosis of skin |
| D86.81 | Sarcoid meningitis |
| D86.82 | Multiple cranial nerve palsies in sarcoidosis |
| D86.83 | Sarcoid iridocyclitis |
| D86.84 | Sarcoid pyelonephritis |
| D86.85 | Sarcoid myocarditis |
| D86.86 | Sarcoid arthropathy |
| D86.87 | Sarcoid myositis |
| D86.89 | Sarcoidosis of other sites |
| D86.9 | Sarcoidosis, unspecified |
| E03.5 | Myxedema coma |
| E83.10 | Disorder of iron metabolism, unspecified |
| E83.110 | Hereditary hemochromatosis |
| E83.111 | Hemochromatosis due to repeated red blood cell transfusions |
| E83.118 | Other hemochromatosis |
| E83.119 | Hemochromatosis, unspecified |
| E83.19 | Other disorders of iron metabolism |
| E85.0 | Non-neuropathic heredofamilial amyloidosis |
| E85.1 | Neuropathic heredofamilial amyloidosis |
| E85.2 | Heredofamilial amyloidosis, unspecified |
| E85.3 | Secondary systemic amyloidosis |
| E85.4 | Organ-limited amyloidosis |
| E85.81 | Light chain (AL) amyloidosis |
| E85.82 | Wild-type transthyretin-related (ATTR) amyloidosis |
| E85.89 | Other amyloidosis |
| E85.9 | Amyloidosis, unspecified |
| E86.0 | Dehydration |
| E86.1 | Hypovolemia |
| E87.71 | Transfusion associated circulatory overload |
| E87.79 | Other fluid overload |
| G06.0 | Intracranial abscess and granuloma |
| G06.1 | Intraspinal abscess and granuloma |
| G45.0 | Vertebro-basilar artery syndrome |
| G45.1 | Carotid artery syndrome (hemispheric) |
| G45.2 | Multiple and bilateral precerebral artery syndromes |
| G45.3 | Amaurosis fugax |
| G45.8 | Other transient cerebral ischemic attacks and related syndromes |
| G45.9 | Transient cerebral ischemic attack, unspecified |
| G46.0 | Middle cerebral artery syndrome |
| G46.1 | Anterior cerebral artery syndrome |
| G46.2 | Posterior cerebral artery syndrome |
| G47.30 | Sleep apnea, unspecified |
| G47.31 | Primary central sleep apnea |
| G47.32 | High altitude periodic breathing |
| G47.33 | Obstructive sleep apnea (adult) (pediatric) |
| H34.00 | Transient retinal artery occlusion, unspecified eye |
| H34.01 | Transient retinal artery occlusion, right eye |
| H34.02 | Transient retinal artery occlusion, left eye |
| H34.03 | Transient retinal artery occlusion, bilateral |
| H34.11 | Central retinal artery occlusion, right eye |
| H34.12 | Central retinal artery occlusion, left eye |
| H34.13 | Central retinal artery occlusion, bilateral |
| H34.211 | Partial retinal artery occlusion, right eye |
| H34.212 | Partial retinal artery occlusion, left eye |
| H34.213 | Partial retinal artery occlusion, bilateral |
| H34.231 | Retinal artery branch occlusion, right eye |
| H34.232 | Retinal artery branch occlusion, left eye |
| H34.233 | Retinal artery branch occlusion, bilateral |
| H34.8111 | Central retinal vein occlusion, right eye, with retinal neovascularization |
| H34.8121 | Central retinal vein occlusion, left eye, with retinal neovascularization |
| H34.8131 | Central retinal vein occlusion, bilateral, with retinal neovascularization |
| H34.821 | Venous engorgement, right eye |
| H34.822 | Venous engorgement, left eye |
| H34.823 | Venous engorgement, bilateral |
| H34.8311 | Tributary (branch) retinal vein occlusion, right eye, with retinal neovascularization |
| H34.8321 | Tributary (branch) retinal vein occlusion, left eye, with retinal neovascularization |
| H34.8331 | Tributary (branch) retinal vein occlusion, bilateral, with retinal neovascularization |
| H53.011 | Deprivation amblyopia, right eye |
| H53.012 | Deprivation amblyopia, left eye |
| H53.013 | Deprivation amblyopia, bilateral |
| H53.021 | Refractive amblyopia, right eye |
| H53.022 | Refractive amblyopia, left eye |
| H53.023 | Refractive amblyopia, bilateral |
| H53.031 | Strabismic amblyopia, right eye |
| H53.032 | Strabismic amblyopia, left eye |
| H53.033 | Strabismic amblyopia, bilateral |
| H53.10 | Unspecified subjective visual disturbances |
| H53.11 | Day blindness |
| H53.121 | Transient visual loss, right eye |
| H53.122 | Transient visual loss, left eye |
| H53.123 | Transient visual loss, bilateral |
| H53.131 | Sudden visual loss, right eye |
| H53.132 | Sudden visual loss, left eye |
| H53.133 | Sudden visual loss, bilateral |
| H53.141 | Visual discomfort, right eye |
| H53.142 | Visual discomfort, left eye |
| H53.143 | Visual discomfort, bilateral |
| H53.15 | Visual distortions of shape and size |
| H53.16 | Psychophysical visual disturbances |
| H53.19 | Other subjective visual disturbances |
| I01.0 | Acute rheumatic pericarditis |
| I01.1 | Acute rheumatic endocarditis |
| I01.2 | Acute rheumatic myocarditis |
| I01.8 | Other acute rheumatic heart disease |
| I01.9 | Acute rheumatic heart disease, unspecified |
| I02.0 | Rheumatic chorea with heart involvement |
| I02.9 | Rheumatic chorea without heart involvement |
| I05.0 | Rheumatic mitral stenosis |
| I05.1 | Rheumatic mitral insufficiency |
| I05.2 | Rheumatic mitral stenosis with insufficiency |
| I05.8 | Other rheumatic mitral valve diseases |
| I05.9 | Rheumatic mitral valve disease, unspecified |
| I06.0 | Rheumatic aortic stenosis |
| I06.1 | Rheumatic aortic insufficiency |
| I06.2 | Rheumatic aortic stenosis with insufficiency |
| I06.8 | Other rheumatic aortic valve diseases |
| I06.9 | Rheumatic aortic valve disease, unspecified |
| I07.0 | Rheumatic tricuspid stenosis |
| I07.1 | Rheumatic tricuspid insufficiency |
| I07.2 | Rheumatic tricuspid stenosis and insufficiency |
| I07.8 | Other rheumatic tricuspid valve diseases |
| I07.9 | Rheumatic tricuspid valve disease, unspecified |
| I08.0 | Rheumatic disorders of both mitral and aortic valves |
| I08.1 | Rheumatic disorders of both mitral and tricuspid valves |
| I08.2 | Rheumatic disorders of both aortic and tricuspid valves |
| I08.3 | Combined rheumatic disorders of mitral, aortic and tricuspid valves |
| I08.8 | Other rheumatic multiple valve diseases |
| I08.9 | Rheumatic multiple valve disease, unspecified |
| I09.0 | Rheumatic myocarditis |
| I09.1 | Rheumatic diseases of endocardium, valve unspecified |
| I09.2 | Chronic rheumatic pericarditis |
| I09.81 | Rheumatic heart failure |
| I09.89 | Other specified rheumatic heart diseases |
| I10 | Essential (primary) hypertension |
| I11.0 | Hypertensive heart disease with heart failure |
| I11.9 | Hypertensive heart disease without heart failure |
| I12.0 | Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease |
| I12.9 | Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| I13.0 | Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| I13.10 | Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| I13.11 | Hypertensive heart and chronic kidney disease without heart failure, with stage 5 chronic kidney disease, or end stage renal disease |
| I13.2 | Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease |
| I15.0 | Renovascular hypertension |
| I15.1 | Hypertension secondary to other renal disorders |
| I16.0 | Hypertensive urgency |
| I16.1 | Hypertensive emergency |
| I16.9 | Hypertensive crisis, unspecified |
| I20.0 | Unstable angina |
| I20.1 | Angina pectoris with documented spasm |
| I20.81 | Angina pectoris with coronary microvascular dysfunction |
| I20.89 | Other forms of angina pectoris |
| I20.9 | Angina pectoris, unspecified |
| I21.01 | ST elevation (STEMI) myocardial infarction involving left main coronary artery |
| I21.02 | ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery |
| I21.09 | ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall |
| I21.11 | ST elevation (STEMI) myocardial infarction involving right coronary artery |
| I21.19 | ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall |
| I21.21 | ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery |
| I21.29 | ST elevation (STEMI) myocardial infarction involving other sites |
| I21.3 | ST elevation (STEMI) myocardial infarction of unspecified site |
| I21.4 | Non-ST elevation (NSTEMI) myocardial infarction |
| I21.9 | Acute myocardial infarction, unspecified |
| I21.A1 | Myocardial infarction type 2 |
| I21.A9 | Other myocardial infarction type |
| I21.B | Myocardial infarction with coronary microvascular dysfunction |
| I22.0 | Subsequent ST elevation (STEMI) myocardial infarction of anterior wall |
| I22.1 | Subsequent ST elevation (STEMI) myocardial infarction of inferior wall |
| I22.2 | Subsequent non-ST elevation (NSTEMI) myocardial infarction |
| I22.8 | Subsequent ST elevation (STEMI) myocardial infarction of other sites |
| I22.9 | Subsequent ST elevation (STEMI) myocardial infarction of unspecified site |
| I23.0 | Hemopericardium as current complication following acute myocardial infarction |
| I23.1 | Atrial septal defect as current complication following acute myocardial infarction |
| I23.2 | Ventricular septal defect as current complication following acute myocardial infarction |
| I23.3 | Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction |
| I23.4 | Rupture of chordae tendineae as current complication following acute myocardial infarction |
| I23.5 | Rupture of papillary muscle as current complication following acute myocardial infarction |
| I23.6 | Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction |
| I23.7 | Postinfarction angina |
| I23.8 | Other current complications following acute myocardial infarction |
| I24.0 | Acute coronary thrombosis not resulting in myocardial infarction |
| I24.1 | Dressler's syndrome |
| I24.81 | Acute coronary microvascular dysfunction |
| I24.89 | Other forms of acute ischemic heart disease |
| I24.9 | Acute ischemic heart disease, unspecified |
| I25.10 | Atherosclerotic heart disease of native coronary artery without angina pectoris |
| I25.110 | Atherosclerotic heart disease of native coronary artery with unstable angina pectoris |
| I25.111 | Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm |
| I25.112 | Atherosclerotic heart disease of native coronary artery with refractory angina pectoris |
| I25.118 | Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris |
| I25.119 | Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris |
| I25.2 | Old myocardial infarction |
| I25.3 | Aneurysm of heart |
| I25.41 | Coronary artery aneurysm |
| I25.42 | Coronary artery dissection |
| I25.5 | Ischemic cardiomyopathy |
| I25.6 | Silent myocardial ischemia |
| I25.700 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris |
| I25.701 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm |
| I25.702 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris |
| I25.708 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris |
| I25.709 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris |
| I25.710 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris |
| I25.711 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm |
| I25.712 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris |
| I25.718 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris |
| I25.719 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris |
| I25.720 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris |
| I25.721 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm |
| I25.722 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris |
| I25.728 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris |
| I25.729 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris |
| I25.730 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris |
| I25.731 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm |
| I25.732 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris |
| I25.738 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris |
| I25.739 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris |
| I25.750 | Atherosclerosis of native coronary artery of transplanted heart with unstable angina |
| I25.751 | Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm |
| I25.752 | Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris |
| I25.758 | Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris |
| I25.759 | Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris |
| I25.760 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina |
| I25.761 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm |
| I25.762 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris |
| I25.768 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris |
| I25.769 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris |
| I25.790 | Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris |
| I25.791 | Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm |
| I25.792 | Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris |
| I25.798 | Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris |
| I25.799 | Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris |
| I25.810 | Atherosclerosis of coronary artery bypass graft(s) without angina pectoris |
| I25.811 | Atherosclerosis of native coronary artery of transplanted heart without angina pectoris |
| I25.812 | Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris |
| I25.82 | Chronic total occlusion of coronary artery |
| I25.83 | Coronary atherosclerosis due to lipid rich plaque |
| I25.84 | Coronary atherosclerosis due to calcified coronary lesion |
| I25.85 | Chronic coronary microvascular dysfunction |
| I25.89 | Other forms of chronic ischemic heart disease |
| I25.9 | Chronic ischemic heart disease, unspecified |
| I26.01 | Septic pulmonary embolism with acute cor pulmonale |
| I26.02 | Saddle embolus of pulmonary artery with acute cor pulmonale |
| I26.03 | Cement embolism of pulmonary artery with acute cor pulmonale |
| I26.04 | Fat embolism of pulmonary artery with acute cor pulmonale |
| I26.09 | Other pulmonary embolism with acute cor pulmonale |
| I26.90 | Septic pulmonary embolism without acute cor pulmonale |
| I26.92 | Saddle embolus of pulmonary artery without acute cor pulmonale |
| I26.93 | Single subsegmental thrombotic pulmonary embolism without acute cor pulmonale |
| I26.94 | Multiple subsegmental thrombotic pulmonary emboli without acute cor pulmonale |
| I26.95 | Cement embolism of pulmonary artery without acute cor pulmonale |
| I26.96 | Fat embolism of pulmonary artery without acute cor pulmonale |
| I26.99 | Other pulmonary embolism without acute cor pulmonale |
| I27.0 | Primary pulmonary hypertension |
| I27.1 | Kyphoscoliotic heart disease |
| I27.20 | Pulmonary hypertension, unspecified |
| I27.21 | Secondary pulmonary arterial hypertension |
| I27.22 | Pulmonary hypertension due to left heart disease |
| I27.23 | Pulmonary hypertension due to lung diseases and hypoxia |
| I27.24 | Chronic thromboembolic pulmonary hypertension |
| I27.29 | Other secondary pulmonary hypertension |
| I27.82 | Chronic pulmonary embolism |
| I27.83 | Eisenmenger's syndrome |
| I27.840 | Fontan-associated liver disease [FALD] |
| I27.841 | Fontan-associated lymphatic dysfunction |
| I27.848 | Other Fontan-associated condition |
| I27.89 | Other specified pulmonary heart diseases |
| I28.0 | Arteriovenous fistula of pulmonary vessels |
| I28.1 | Aneurysm of pulmonary artery |
| I30.0 | Acute nonspecific idiopathic pericarditis |
| I30.1 | Infective pericarditis |
| I30.8 | Other forms of acute pericarditis |
| I30.9 | Acute pericarditis, unspecified |
| I31.0 | Chronic adhesive pericarditis |
| I31.1 | Chronic constrictive pericarditis |
| I31.2 | Hemopericardium, not elsewhere classified |
| I31.31 | Malignant pericardial effusion in diseases classified elsewhere |
| I31.39 | Other pericardial effusion (noninflammatory) |
| I31.4 | Cardiac tamponade |
| I31.8 | Other specified diseases of pericardium |
| I31.9 | Disease of pericardium, unspecified |
| I32 | Pericarditis in diseases classified elsewhere |
| I33.0 | Acute and subacute infective endocarditis |
| I33.9 | Acute and subacute endocarditis, unspecified |
| I34.0 | Nonrheumatic mitral (valve) insufficiency |
| I34.1 | Nonrheumatic mitral (valve) prolapse |
| I34.2 | Nonrheumatic mitral (valve) stenosis |
| I34.81 | Nonrheumatic mitral (valve) annulus calcification |
| I34.89 | Other nonrheumatic mitral valve disorders |
| I34.9 | Nonrheumatic mitral valve disorder, unspecified |
| I35.0 | Nonrheumatic aortic (valve) stenosis |
| I35.1 | Nonrheumatic aortic (valve) insufficiency |
| I35.2 | Nonrheumatic aortic (valve) stenosis with insufficiency |
| I35.8 | Other nonrheumatic aortic valve disorders |
| I35.9 | Nonrheumatic aortic valve disorder, unspecified |
| I36.0 | Nonrheumatic tricuspid (valve) stenosis |
| I36.1 | Nonrheumatic tricuspid (valve) insufficiency |
| I36.2 | Nonrheumatic tricuspid (valve) stenosis with insufficiency |
| I36.8 | Other nonrheumatic tricuspid valve disorders |
| I36.9 | Nonrheumatic tricuspid valve disorder, unspecified |
| I37.0 | Nonrheumatic pulmonary valve stenosis |
| I37.1 | Nonrheumatic pulmonary valve insufficiency |
| I37.2 | Nonrheumatic pulmonary valve stenosis with insufficiency |
| I37.8 | Other nonrheumatic pulmonary valve disorders |
| I37.9 | Nonrheumatic pulmonary valve disorder, unspecified |
| I38 | Endocarditis, valve unspecified |
| I39 | Endocarditis and heart valve disorders in diseases classified elsewhere |
| I40.0 | Infective myocarditis |
| I40.1 | Isolated myocarditis |
| I40.8 | Other acute myocarditis |
| I40.9 | Acute myocarditis, unspecified |
| I41 | Myocarditis in diseases classified elsewhere |
| I42.0 | Dilated cardiomyopathy |
| I42.1 | Obstructive hypertrophic cardiomyopathy |
| I42.2 | Other hypertrophic cardiomyopathy |
| I42.3 | Endomyocardial (eosinophilic) disease |
| I42.4 | Endocardial fibroelastosis |
| I42.5 | Other restrictive cardiomyopathy |
| I42.6 | Alcoholic cardiomyopathy |
| I42.7 | Cardiomyopathy due to drug and external agent |
| I42.8 | Other cardiomyopathies |
| I42.9 | Cardiomyopathy, unspecified |
| I43 | Cardiomyopathy in diseases classified elsewhere |
| I44.1 | Atrioventricular block, second degree |
| I44.2 | Atrioventricular block, complete |
| I44.30 | Unspecified atrioventricular block |
| I44.39 | Other atrioventricular block |
| I44.4 | Left anterior fascicular block |
| I44.5 | Left posterior fascicular block |
| I44.60 | Unspecified fascicular block |
| I44.69 | Other fascicular block |
| I44.7 | Left bundle-branch block, unspecified |
| I45.0 | Right fascicular block |
| I45.10 | Unspecified right bundle-branch block |
| I45.19 | Other right bundle-branch block |
| I45.2 | Bifascicular block |
| I45.3 | Trifascicular block |
| I45.4 | Nonspecific intraventricular block |
| I45.5 | Other specified heart block |
| I45.6 | Pre-excitation syndrome |
| I45.9 | Conduction disorder, unspecified |
| I46.2 | Cardiac arrest due to underlying cardiac condition |
| I46.8 | Cardiac arrest due to other underlying condition |
| I46.9 | Cardiac arrest, cause unspecified |
| I47.0 | Re-entry ventricular arrhythmia |
| I47.10 | Supraventricular tachycardia, unspecified |
| I47.11 | Inappropriate sinus tachycardia, so stated |
| I47.19 | Other supraventricular tachycardia |
| I47.20 | Ventricular tachycardia, unspecified |
| I47.21 | Torsades de pointes |
Showing the first 400 of 1839 covered codes — this procedure has a large covered-diagnosis set; see the governing LCD/article for the complete list.
Frequently asked questions
Which ICD-10 codes support medical necessity for CPT Q9955?
Medicare coverage policies (LCDs/NCDs and Billing & Coding articles) list 1839 ICD-10 diagnosis codes that support medical necessity for CPT Q9955. The covered codes are listed on this page. Coverage varies by MAC/state — always confirm against the policy that applies to you.
What is a medical-necessity (LCD/NCD) crosswalk?
A claim whose procedure isn't supported by a covered diagnosis denies as "not medically necessary" (CARC 50). CMS coverage policies define which diagnoses justify a procedure; this page is the ICD-10 → CPT Q9955 view of that relationship.
Catch medical-necessity denials before you bill. CareNiva scrubs claims against LCD/NCD coverage and flags unsupported diagnoses — in the same platform you run visits and billing.
More free billing tools: all crosswalks · NCCI edits · Medicare fees · denial codes
Informational only, not coding, billing, or legal advice. Based on CMS Medicare Coverage Database data; verify the current LCD/NCD for your MAC before billing.
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