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I20.8 ICD-10-CM Code: Other forms of angina pectoris

I20.8 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools

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Code lookupI20.8

FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Ischemic heart diseases (I20-I25)

I20.8

Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidance

Other forms of angina pectoris

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

N/A

—

Not mapped

CMS-HCC V24

N/A

—

Not mapped

ACA/HHS

N/A

—

Not mapped

ESRD/PACE

N/A

—

Not mapped

RXHCC

N/A

—

Not mapped

Code Book Path

Official
I20Angina pectorisI20.8Other forms of angina pectoris

Inclusion Terms

Official

No inclusion terms are included in this display for I20.8. Check the code and parent instructions in the Code Book.

Excludes 2

Official
  • certain conditions originating in the perinatal period (P04-P96)Inherited from I00-I99
  • certain infectious and parasitic diseases (A00-B99)Inherited from I00-I99
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from I00-I99
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from I00-I99
  • endocrine, nutritional and metabolic diseases (E00-E88)Inherited from I00-I99
  • injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from I00-I99
  • neoplasms (C00-D49)Inherited from I00-I99
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from I00-I99
  • systemic connective tissue disorders (M30-M36)Inherited from I00-I99
  • transient cerebral ischemic attacks and related syndromes (G45.-)Inherited from I00-I99

Related Codes

Official
I20.81Angina pectoris with coronary microvascular dysfunctionI20.89Other forms of angina pectoris

Includes

Official

No Includes notes are included in this display for I20.8. Check the code and parent instructions in the Code Book.

Excludes 1

Official
  • angina pectoris with atherosclerotic heart disease of native coronary arteries (I25.1-)Inherited from I20
  • atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris (I25.7-)Inherited from I20
  • postinfarction angina (I23.7)Inherited from I20

Code First

Official

No Code First sequencing instructions are included in this display for I20.8. Check the code and parent instructions in the Code Book.

Use Additional

Official
  • code(s) for symptoms associated with angina equivalent
  • code to identify:Inherited from I20
  • exposure to environmental tobacco smoke (Z77.22)Inherited from I20
  • history of tobacco dependence (Z87.891)Inherited from I20
  • occupational exposure to environmental tobacco smoke (Z57.31)Inherited from I20
  • tobacco dependence (F17.-)Inherited from I20
  • tobacco use (Z72.0)Inherited from I20

Code Also

Official
  • the presence of hypertension (I10-I1A)Inherited from I20-I25

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Code
I20.8
Description
Other forms of angina pectoris
HCC (V28)
No CMS-HCC V28 mapping
RAF reference coefficient
—
Billable
No
Payment year
2026

Coder workflow notes

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What This Code Means

I20.8 is the ICD-10-CM diagnosis code for other forms of angina pectoris. I20.8 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering ischemic heart diseases (i20-i25).

Header codes like I20.8 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for I20.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Use Additional Code

  • code(s) for symptoms associated with angina equivalent

Child Codes

I20.81Angina pectoris with coronary microvascular dysfunction
I20.89Other forms of angina pectoris

Code Hierarchy

└I20Angina pectoris└I20.8Other forms of angina pectoris
└I20.8Other forms of angina pectoris

I20.8 code history

Code setChange
FY2024 (effective Oct 1, 2023)Billability changed (now non-billable header)

Source: official CMS ICD-10-CM order and addenda files, FY2016 through FY2027.

Also searched as

  • I20 8
  • I208

More on I20.8

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