I20.1

Billable
ChapterI00–I99
Ranksubcategory
Official Description

Angina pectoris with documented spasm

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

Instructional Notes

Includes
  • Angiospastic angina
  • Prinzmetal angina
  • Spasm-induced angina
  • Variant angina
General instructions are available for the parent sections:
View CH9 NotesView I20-I25 NotesView I20 Notes

Clinical Hierarchy

CH9Diseases of the circulatory system (I00-I99)
I20-I25Ischemic heart diseases (I20-I25)
I20Angina pectoris
I20.1Angina pectoris with documented spasm

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I20.1:

categoryI20
Angina pectoris
View context instructions
blockI20-I25
Ischemic heart diseases (I20-I25)
View context instructions
chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to I20.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

7 raw paths
Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)1 unique routes
with
documented spasm→I20.1
Ischemia, ischemic1 unique routes
supply (coronary)
due to vasospasm→I20.1
Prinzmetal angina1 unique routes
Direct index entry→I20.1
Spasm (s), spastic, spasticity3 unique routes
cardiac→I20.1
coronary (artery)→I20.1
heart→I20.1
Vasospasm (vasoconstriction)1 unique routes
coronary→I20.1

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 311
Angina Pectoris

Cross Reference

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