ICD-10-CM
ICD-10 code for Angina: I20.9
The ICD-10-CM index points "Angina" to I20 (Angina pectoris), a header that is not billable. When nothing more specific is documented, the billable code is I20.9, Angina pectoris, unspecified.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- K55.1abdominal, Chronic vascular disorders of intestineBillable
- B08.5aphthous, Enteroviral vesicular pharyngitisBillable
- J05.0croupous, Acute obstructive laryngitis [croup]Billable
- I73.9cruris, Peripheral vascular disease, unspecifiedBillable
- A36.0diphtheritic, membranous, Pharyngeal diphtheriaBillable
- I20.89equivalent, Other forms of angina pectorisBillable
- J37.0exudative, chronic, Chronic laryngitisBillable
- I23.7following acute myocardial infarction, Postinfarction anginaBillable
- A36.0gangrenous diphtheritic, Pharyngeal diphtheriaBillable
- K55.1intestinal, Chronic vascular disorders of intestineBillable
- K12.2Ludovici, Cellulitis and abscess of mouthBillable
- K12.2Ludwig's, Cellulitis and abscess of mouthBillable
- A36.0malignant diphtheritic, Pharyngeal diphtheriaBillable
- J05.0membranous, Acute obstructive laryngitis [croup]Billable
- K55.1mesenteric, Chronic vascular disorders of intestineBillable
- J36phlegmonous, Peritonsillar abscessBillable
- I23.7post-infarctional, Postinfarction anginaBillable
- A69.1pseudomembranous, Other Vincent's infectionsBillable
- A36.0pultaceous, diphtheritic, Pharyngeal diphtheriaBillable
- I20.2refractory, Refractory angina pectorisBillable
- I20.89specified NEC, Other forms of angina pectorisBillable
- I20.89stable, Other forms of angina pectorisBillable
- A36.2stridulous, diphtheritic, Laryngeal diphtheriaBillable
- J36tonsil, Peritonsillar abscessBillable
- J05.0trachealis, Acute obstructive laryngitis [croup]Billable
- I20.0unstable, Unstable anginaBillable
- A69.1Vincent's, Other Vincent's infectionsBillable
More specific codes in I20
A header groups codes and is not billed. A billable code is one you can report.
- I20Angina pectorisHeader
- I20.0Unstable anginaBillable
- I20.1Angina pectoris with documented spasmBillable
- I20.2Refractory angina pectorisBillable
- I20.8Other forms of angina pectorisHeader
- I20.81Angina pectoris with coronary microvascular dysfunctionBillable
- I20.89Other forms of angina pectorisBillable
- I20.9Angina pectoris, unspecifiedBillable
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From I20. A note on a category applies to every code under it.
Excludes1
Excludes1 means these codes are not reported together.
From I20. A note on a category applies to every code under it.
Related conditions
Related pages
- I20.9 code detailsNotes, nearby codes, CMS-HCC group
- Category I20Every code under it
- Chapter 9Diseases of the circulatory system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Angina?
The ICD-10-CM index points "Angina" to I20 (Angina pectoris), a header that is not billable. When nothing more specific is documented, the billable code is I20.9, Angina pectoris, unspecified.
Is I20.9 billable?
Yes. I20.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to I20.9?
The CDC tabular list gives 3 Excludes1 notes (not coded together), 6 "use additional code" notes for I20.9 and the categories above it. They are listed on this page.
What chapter is I20.9 in?
Chapter 9. Diseases of the circulatory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.