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HomeICD-10 CodesI20
ICD-10-CM
Non-billable

I20

Classification
Category:Diseases of the circulatory system
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Coding Guidance
I20 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.
Excludes 1
I25.1
angina pectoris with atherosclerotic heart disease of native coronary arteries
I25.7
atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
I23.7
postinfarction angina
Excludes 2
P04-P96
certain conditions originating in the perinatal period
A00-B99
certain infectious and parasitic diseases
O00-O9A
complications of pregnancy, childbirth and the puerperium
Q00-Q99
congenital malformations, deformations, and chromosomal abnormalities
E00-E88
endocrine, nutritional and metabolic diseases
S00-T88
injury, poisoning and certain other consequences of external causes
C00-D49
neoplasms
R00-R94
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
M30-M36
systemic connective tissue disorders
G45
transient cerebral ischemic attacks and related syndromes
Use Additional Code
/codes/Z77.22
exposure to environmental tobacco smoke
/codes/Z87.891
history of tobacco dependence
/codes/Z57.31
occupational exposure to environmental tobacco smoke
/codes/F17
tobacco dependence
/codes/Z72.0
tobacco use

More Specific Codes

I20.0
Unstable angina
I20.1
Angina pectoris with documented spasm
I20.2
Refractory angina pectoris
I20.8
Other forms of angina pectoris
I20.9
Angina pectoris, unspecified

External Resources

2025 ICD-10 guidelines from CMS.gov