2023

  1. ICD-10-CM Codes
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  2. I00-I99
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  3. I20-I25
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  5. 2023 ICD-10-CM Diagnosis Code I20.8

2023 ICD-10-CM Diagnosis Code I20.8

Other forms of angina pectoris

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • I20.8 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM I20.8 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of I20.8 - other international versions of ICD-10 I20.8 may differ.
Applicable To
  • Angina equivalent
  • Angina of effort
  • Coronary slow flow syndrome
  • Stenocardia
  • Stable angina
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code(s) for symptoms associated with angina equivalent
The following code(s) above I20.8 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I20.8:
  • I00-I99
    2023 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • 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.-)
    Diseases of the circulatory system
  • I20-I25
    2023 ICD-10-CM Range I20-I25

    Ischemic heart diseases

    Code Also
    • the presence of hypertension (I10-I16)
    Ischemic heart diseases
  • I20
    ICD-10-CM Diagnosis Code I20

    Angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • angina pectoris with atherosclerotic heart disease of native coronary arteries (I25.1-)
    • atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris (I25.7-)
    • postinfarction angina (I23.7)
    Use Additional
    • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Angina pectoris
Approximate Synonyms
  • Angina decubitus
  • Decubitus angina
  • Nocturnal angina
Clinical Information
  • A disorder characterized by substernal discomfort due to insufficient myocardial oxygenation.
  • A heart condition marked by paroxysms of chest pain due to reduced oxygen to the heart.
  • Angina is chest pain or discomfort you get when your heart muscle does not get enough blood. It may feel like pressure or a squeezing pain in your chest. It may feel like indigestion. You may also feel pain in your shoulders, arms, neck, jaw or back. Angina is a symptom of coronary artery disease (cad), the most common heart disease. Cad happens when a sticky substance called plaque builds up in the arteries that supply blood to the heart, reducing blood flow.there are three types of angina: stable, unstable and variant. Unstable angina is the most dangerous. It does not follow a pattern and can happen without physical exertion. It does not go away with rest or medicine. It is a sign that you could have a heart attack soon.not all chest pain or discomfort is angina. If you have chest pain, you should see your health care provider.
  • Chest pain caused by coronary heart disease
  • Previous or current symptoms described as chest pain or pressure, jaw pain, arm pain, or other equivalent discomfort suggestive of cardiac ischemia. (nih roadmap cardiovascular data standards working group)
  • Recurring thoracic pain or discomfort which occurs when a part of the heart does not receive enough blood; usually caused by exertion or excitement.
  • The symptom of paroxysmal pain consequent to myocardial ischemia usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the myocardium exceed that supplied by the coronary circulation.
ICD-10-CM I20.8 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 311 Angina pectoris

Convert I20.8 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
Code annotations containing back-references to I20.8:
  • Type 1 Excludes: I25.118
    , I25.708
    , I25.718
    , I25.728
    , I25.738
    , I25.798
    ICD-10-CM Diagnosis Code I25.118

    Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • other forms of angina pectoris without atherosclerotic heart disease (I20.8)
    ICD-10-CM Diagnosis Code I25.708

    Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • other forms of angina pectoris without atherosclerosis of coronary artery bypass graft (I20.8)
    ICD-10-CM Diagnosis Code I25.718

    Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • other forms of angina pectoris without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.8)
    ICD-10-CM Diagnosis Code I25.728

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • other forms of angina pectoris without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.8)
    ICD-10-CM Diagnosis Code I25.738

    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • other forms of angina pectoris without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.8)
    ICD-10-CM Diagnosis Code I25.798

    Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • other forms of angina pectoris without atherosclerosis of other coronary artery bypass graft(s) (I20.8)

Diagnosis Index entries containing back-references to I20.8:
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) I20.9
    ICD-10-CM Diagnosis Code I20.9

    Angina pectoris, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Angina NOS
    • Anginal syndrome
    • Cardiac angina
    • Ischemic chest pain
    • equivalent I20.8
    • specified NEC I20.8
    • stable I20.8
  • Likoff's syndrome I20.8
  • Schaufenster krankheit I20.8
  • Slow
    • flow syndrome, coronary I20.8
  • Stenocardia I20.8
  • Syncope (near) (pre-) R55
    ICD-10-CM Diagnosis Code R55

    Syncope and collapse

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Blackout
    • Fainting
    • Vasovagal attack
    Type 1 Excludes
    • cardiogenic shock (R57.0)
    • carotid sinus syncope (G90.01)
    • heat syncope (T67.1)
    • neurocirculatory asthenia (F45.8)
    • neurogenic orthostatic hypotension (G90.3)
    • orthostatic hypotension (I95.1)
    • postprocedural shock (T81.1-)
    • psychogenic syncope (F48.8)
    • shock NOS (R57.9)
    • shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3)
    • shock complicating or following labor and delivery (O75.1)
    • Stokes-Adams attack (I45.9)
    • unconsciousness NOS (R40.2-)
    • anginosa I20.8
  • Syndrome - see also Disease
    • coronary
      • slow flow I20.8
    • Heberden's I20.8
    • Likoff's I20.8
    • slow flow, coronary I20.8

ICD-10-CM Codes Adjacent To I20.8
I15.8 Other secondary hypertension
I15.9 Secondary hypertension, unspecified
I16 Hypertensive crisis
I16.0 Hypertensive urgency
I16.1 Hypertensive emergency
I16.9 Hypertensive crisis, unspecified
I20 Angina pectoris
I20.0 Unstable angina
I20.1 Angina pectoris with documented spasm
I20.2 Refractory angina pectoris
I20.8 Other forms of angina pectoris
I20.9 Angina pectoris, unspecified
I21 Acute myocardial infarction
I21.0 ST elevation (STEMI) myocardial infarction of anterior wall
I21.01 ST elevation (STEMI) myocardial infarction involving left main coronary artery
I21.02 ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
I21.09 ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
I21.1 ST elevation (STEMI) myocardial infarction of inferior wall
I21.11 ST elevation (STEMI) myocardial infarction involving right coronary artery
I21.19 ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
I21.2 ST elevation (STEMI) myocardial infarction of other sites

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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