ICD-10-CM Excludes2 Notes · Chapter 9 · FY 2027 I00-I99

Excludes2 Notes in Chapter 9: Diseases of the circulatory system ICD-10-CM

An Excludes2 note means "NOT INCLUDED HERE": the excluded condition is not part of this code, but a patient may have both, so both codes may be reported. In Chapter 9 (I00-I99), notes printed in the chapter name other codes 187 times, and Excludes2 Notes anywhere in the Tabular List name the chapter’s codes 146 times, covering 95 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A

187

References in Its Notes

146

References to Its Codes

Chapter Codes Named

I00-I99

Chapter 9

Excludes2 Notes by the code that carries the note

62 of 62 shown

Chapter note Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
I06 Rheumatic aortic valve diseases applies to 5 codes
- aortic valve disease not specified as rheumatic (I35.-)
- aortic valve disease with mitral and/or tricuspid valve involvement (I08.-)
I08 Multiple valve diseases applies to 6 codes
- multiple valve disease specified as nonrheumatic (I34.-, I35.-, I36.-, I37.-, I38.-, Q22.-, Q23.-, Q24.8-)
Block note Block I10-I1A Hypertensive diseases applies to 18 codes
- hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
I10 Essential (primary) hypertension
- essential (primary) hypertension involving vessels of brain (I60-I69)
- essential (primary) hypertension involving vessels of eye (H35.0-)
I12 Hypertensive chronic kidney disease applies to 2 codes
- acute kidney failure (N17.-)
I15 Secondary hypertension applies to 5 codes
- secondary hypertension involving vessels of brain (I60-I69)
- secondary hypertension involving vessels of eye (H35.0-)
I21 Acute myocardial infarction applies to 13 codes
- old myocardial infarction (I25.2)
- postmyocardial infarction syndrome (I24.1)
- subsequent type 1 myocardial infarction (I22.-)
I21.19 ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
- ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery (I21.21)
I24 Other acute ischemic heart diseases applies to 5 codes
- non-ischemic myocardial injury (I5A)
I25 Chronic ischemic heart disease applies to 56 codes
- non-ischemic myocardial injury (I5A)
I25.1 Atherosclerotic heart disease of native coronary artery applies to 6 codes
- atheroembolism (I75.-)
- atherosclerosis of coronary artery bypass graft(s) and transplanted heart (I25.7-)
I25.5 Ischemic cardiomyopathy
- coronary atherosclerosis (I25.1-, I25.7-)
I25.710 Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris
- embolism or thrombus of coronary artery bypass graft(s) (T82.8-)
I25.81 Atherosclerosis of other coronary vessels without angina pectoris applies to 3 codes
- atherosclerotic heart disease of native coronary artery without angina pectoris (I25.10)
I26 Pulmonary embolism applies to 12 codes
- chronic pulmonary embolism (I27.82)
- personal history of pulmonary embolism (Z86.711)
- pulmonary embolism complicating abortion, ectopic or molar pregnancy (O00-O07, O08.2)
- pulmonary embolism complicating pregnancy, childbirth and the puerperium (O88.-)
- pulmonary embolism due to trauma (T79.0, T79.1)
- pulmonary embolism due to complications of surgical and medical care (T80.0, T81.7-, T82.8-)
- septic (non-pulmonary) arterial embolism (I76)
I35 Nonrheumatic aortic valve disorders applies to 5 codes
- aortic valve disorder of unspecified cause but with diseases of mitral and/or tricuspid valve(s) (I08.-)
- aortic valve disorder specified as congenital (Q23.0, Q23.1)
- aortic valve disorder specified as rheumatic (I06.-)
- hypertrophic subaortic stenosis (I42.1)
I42 Cardiomyopathy applies to 13 codes
- ischemic cardiomyopathy (I25.5)
- peripartum cardiomyopathy (O90.3)
- ventricular hypertrophy (I51.7)
I46 Cardiac arrest applies to 3 codes
- cardiogenic shock (R57.0)
I49 Other cardiac arrhythmias applies to 12 codes
- bradycardia NOS (R00.1)
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
I50 Heart failure applies to 23 codes
- cardiac arrest (I46.-)
- neonatal cardiac failure (P29.0)
I50.9 Heart failure, unspecified
- fluid overload unrelated to congestive heart failure (E87.70)
I51 Complications and ill-defined descriptions of heart disease applies to 10 codes
- heart disease specified as rheumatic (I00-I09)
I5A Non-ischemic myocardial injury (non-traumatic)
- other acute ischemic heart diseases (I24.-)
I60 Nontraumatic subarachnoid hemorrhage applies to 18 codes
- sequelae of subarachnoid hemorrhage (I69.0-)
I61 Nontraumatic intracerebral hemorrhage applies to 9 codes
- sequelae of intracerebral hemorrhage (I69.1-)
I62 Other and unspecified nontraumatic intracranial hemorrhage applies to 6 codes
- sequelae of intracranial hemorrhage (I69.2)
I63 Cerebral infarction applies to 91 codes
- chronic, without residual deficits (sequelae) (Z86.73)
- sequelae of cerebral infarction (I69.3-)
I63.9 Cerebral infarction, unspecified
- transient cerebral ischemic attacks and related syndromes (G45.-)
I67 Other cerebrovascular diseases applies to 17 codes
- sequelae of the listed conditions (I69.8)
I67.4 Hypertensive encephalopathy
- insufficiency, NOS, of precerebral arteries (G45.2)
I69.322 Dysarthria following cerebral infarction
- transient ischemic attack (TIA) (G45.9)
I69.351 Hemiplegia and hemiparesis following cerebral infarction affecting right dominant side
- transient ischemic attack (TIA) (G45.9)
I70 Atherosclerosis applies to 246 codes
- arteriosclerotic cardiovascular disease (I25.1-)
- arteriosclerotic heart disease (I25.1-)
- atheroembolism (I75.-)
- cerebral atherosclerosis (I67.2)
- coronary atherosclerosis (I25.1-)
- mesenteric atherosclerosis (K55.1)
- precerebral atherosclerosis (I67.2)
- primary pulmonary atherosclerosis (I27.0)
I70.1 Atherosclerosis of renal artery
- atherosclerosis of renal arterioles (I12.-)
I70.2 Atherosclerosis of native arteries of the extremities applies to 40 codes
- atherosclerosis of bypass graft of extremities (I70.30-I70.79)
I70.9 Other and unspecified atherosclerosis applies to 3 codes
- disorders of pyrophosphate metabolism (E83.82-)
I72 Other aneurysm applies to 9 codes
- acquired aneurysm (I77.0)
- aneurysm (of) aorta (I71.-)
- aneurysm (of) arteriovenous NOS (Q27.3-)
- carotid artery dissection (I77.71)
- cerebral (nonruptured) aneurysm (I67.1)
- coronary aneurysm (I25.4)
- coronary artery dissection (I25.42)
- dissection of artery NEC (I77.79)
- dissection of precerebral artery, congenital (nonruptured) (Q28.1)
- heart aneurysm (I25.3)
- iliac artery dissection (I77.72)
- precerebral artery, congential (nonruptured) (Q28.1)
- pulmonary artery aneurysm (I28.1)
- renal artery dissection (I77.73)
- retinal aneurysm (H35.0)
- ruptured cerebral aneurysm (I60.7)
- varicose aneurysm (I77.0)
- vertebral artery dissection (I77.74)
I72.5 Aneurysm of other precerebral arteries
- aneurysm of carotid artery (I72.0)
- aneurysm of vertebral artery (I72.6)
- dissection of carotid artery (I77.71)
- dissection of other precerebral arteries (I77.75)
- dissection of vertebral artery (I77.74)
I72.6 Aneurysm of vertebral artery
- dissection of vertebral artery (I77.74)
I73 Other peripheral vascular diseases applies to 6 codes
- chilblains (T69.1)
- frostbite (T33-T34)
- immersion hand or foot (T69.0-)
- spasm of cerebral artery (G45.9)
I74 Arterial embolism and thrombosis applies to 11 codes
- atheroembolism (I75.-)
- basilar embolism and thrombosis (I63.0-I63.2, I65.1)
- carotid embolism and thrombosis (I63.0-I63.2, I65.2)
- cerebral embolism and thrombosis (I63.3-I63.5, I66.-)
- coronary embolism and thrombosis (I21-I25)
- mesenteric embolism and thrombosis (K55.0-)
- ophthalmic embolism and thrombosis (H34.-)
- precerebral embolism and thrombosis NOS (I63.0-I63.2, I65.9)
- pulmonary embolism and thrombosis (I26.-)
- renal embolism and thrombosis (N28.0)
- retinal embolism and thrombosis (H34.-)
- septic embolism and thrombosis (I76)
- vertebral embolism and thrombosis (I63.0-I63.2, I65.0)
I76 Septic arterial embolism
- septic pulmonary embolism (I26.01, I26.90)
I77 Other disorders of arteries and arterioles applies to 23 codes
- collagen (vascular) diseases (M30-M36)
- hypersensitivity angiitis (M31.0)
- pulmonary artery (I28.-)
I77.0 Arteriovenous fistula, acquired
- cerebral (I67.1)
- coronary (I25.4)
I77.7 Other arterial dissection applies to 9 codes
- dissection of aorta (I71.0-)
- dissection of coronary artery (I25.42)
I77.74 Dissection of vertebral artery
- aneurysm of vertebral artery (I72.6)
I77.75 Dissection of other precerebral arteries
- aneurysm of carotid artery (I72.0)
- aneurysm of other precerebral arteries (I72.5)
- aneurysm of vertebral artery (I72.6)
- dissection of carotid artery (I77.71)
- dissection of vertebral artery (I77.74)
I77.82 Antineutrophilic cytoplasmic antibody [ANCA] vasculitis
- eosinophilic granulomatosis with polyangiitis (M30.1)
- granulomatosis with polyangiitis (M31.3-)
- microscopic polyangiitis (M31.7)
I78.1 Nevus, non-neoplastic
- blue nevus (D22.-)
- flammeus nevus (Q82.5)
- hairy nevus (D22.-)
- melanocytic nevus (D22.-)
- pigmented nevus (D22.-)
- portwine nevus (Q82.5)
- sanguineous nevus (Q82.5)
- strawberry nevus (Q82.5)
- verrucous nevus (Q82.5)
I81 Portal vein thrombosis
- hepatic vein thrombosis (I82.0)
- phlebitis of portal vein (K75.1)
I82 Other venous embolism and thrombosis applies to 145 codes
- cerebral (I63.6, I67.6)
- coronary (I21-I25)
- intracranial and intraspinal, septic or NOS (G08)
- intracranial, nonpyogenic (I67.6)
- intraspinal, nonpyogenic (G95.1)
- mesenteric (K55.0-)
- portal (I81)
- pulmonary (I26.-)
I83 Varicose veins of lower extremities applies to 57 codes
- varicose veins complicating pregnancy (O22.0-)
- varicose veins complicating the puerperium (O87.4)
I86 Varicose veins of other sites applies to 6 codes
- retinal varices (H35.0-)
I87.1 Compression of vein
- compression of pulmonary vein (I28.8)
I96 Gangrene, not elsewhere classified
- gangrene in diabetes mellitus (E08-E13 with .52)
I97 Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified applies to 39 codes
- postprocedural shock (T81.1-)
I97.1 Other postprocedural cardiac functional disturbances applies to 8 codes
- acute pulmonary insufficiency following thoracic surgery (J95.1)
- intraoperative cardiac functional disturbances (I97.7-)
I97.4 Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a procedure applies to 4 codes
- intraoperative cerebrovascular hemorrhage complicating a procedure (G97.3-)
I97.5 Accidental puncture and laceration of a circulatory system organ or structure during a procedure applies to 2 codes
- accidental puncture and laceration of brain during a procedure (G97.4-)
I97.6 Postprocedural hemorrhage, hematoma and seroma of a circulatory system organ or structure following a procedure applies to 12 codes
- postprocedural cerebrovascular hemorrhage complicating a procedure (G97.5-)
I97.7 Intraoperative cardiac functional disturbances applies to 4 codes
- acute pulmonary insufficiency following thoracic surgery (J95.1)
- postprocedural cardiac functional disturbances (I97.1-)

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Excludes2 Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Excludes2 Notes

What does an Excludes2 note mean?

An Excludes2 note means “Not included here”: the excluded condition is not part of the condition represented by the code, but a patient may have both conditions at the same time (Section I.A.12.b). The FY 2027 Tabular List has 2,529 of them; 2,493 name other codes, with 2,799 references to 1,779 distinct codes, categories and ranges.

Can both codes be reported when there is an Excludes2 note?

Yes. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate: that is, when the patient has both conditions and both are documented.

Related References

ICD-10-CM Official Guidelines ICD-10-CM Code Lookup ICD-10-CM Codes List Code Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.