I20.1

I20.1: Angina pectoris with documented spasm

Billable / specific codeICD-10-CM

I20.1 is a billable, specific ICD-10-CM code for angina pectoris with documented spasm. It is valid for submission on a claim.

Check I20.1 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Angiospastic angina
Prinzmetal angina
Spasm-induced angina
Variant angina

Excludes1 inherited from the categories above I20.1

A category’s note binds every code beneath it.

Written on I20: Angina pectoris

angina pectoris with atherosclerotic heart disease of native coronary arteries (I25.1-)
atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris (I25.7-)
postinfarction angina (I23.7)

Other codes that can never be billed with I20.1

Their own Excludes1 notes name this code, so the conflict is not listed above.

I24Other acute ischemic heart diseases
I25.111Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
I25.701Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm
I25.711Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm
I25.721Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm
I25.731Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm
I25.791Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I20.1 is named in 28 Medicare coverage policies: 28 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A53775Billing and Coding: Frequency and Duration for Cardiac Rehabilitation and Intensive Cardiac Rehabilitation
A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
A56476Billing and Coding: Cardiac Radionuclide Imaging

Alphabetic index entries that lead here

Prinzmetal angina
Spasm, spastic, spasticity›cardiac
Spasm, spastic, spasticity›coronary(artery)
Spasm, spastic, spasticity›heart
Vasospasm›coronary
Angina›with›documented spasm
Ischemia, ischemic›supply›due to vasospasm

Code history

Unchanged in every release from FY2024 to FY2027.