I20.9

Billable

ChapterI00–I99

Ranksubcategory

Official Description

Angina pectoris, unspecified

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

Angina NOS
Anginal syndrome
Cardiac angina
Ischemic chest pain

General instructions are available for the parent sections:

View CH9 Notes View I20-I25 Notes View I20 Notes

Clinical Hierarchy

CH9Diseases of the circulatory system (I00-I99)

I20-I25Ischemic heart diseases (I20-I25)

I20Angina pectoris

I20.9Angina pectoris, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I20.9:

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 I20.9. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

4 raw paths

Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)1 unique routes

Direct index entry→I20.9

Pain (s)1 unique routes

chest (central)

ischemic→I20.9

Status (post)1 unique routes

anginosus→I20.9

Syndrome1 unique routes

X→I20.9

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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