All ICD10 Codes

I20-I25

Non-Billable
ChapterI00–I99
Rankblock
Official Description

Ischemic heart diseases (I20-I25)

Use a more specific code (0 billable, 6 non-billable)
I20Angina pectorishas subcodesI21Acute myocardial infarctionhas subcodesI22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarctionhas subcodesI23Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)has subcodesI24Other acute ischemic heart diseaseshas subcodesI25Chronic ischemic heart diseasehas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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.-)

Instructional Notes

Code Also
  • the presence of hypertension (I10-I1A)

Clinical Hierarchy

BillableHas subcodes
CH9Diseases of the circulatory system (I00-I99)
I20-I25Ischemic heart diseases (I20-I25)Not billable
I20Angina pectorisSubcodes
I21Acute myocardial infarctionSubcodes
I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarctionSubcodes
I23Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)Subcodes
I24Other acute ischemic heart diseasesSubcodes
I25Chronic ischemic heart diseaseSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I20-I25:

chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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