Specific code icon 2017 ICD-10-CM Diagnosis Code I20.0

Unstable angina

    2016 2017 Billable/Specific Code

  • I20.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • This is the American ICD-10-CM version of I20.0. Other international versions of ICD-10 I20.0 may differ.
  • Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Information
  • Angina pectoris (or equivalent type of ischemic discomfort) which has recently changed in frequency, duration, intensity, or occurs at rest.
  • Angina pectoris (or equivalent type of ischemic discomfort) with any 1 of the 3 following features: a) angina occurring at rest and prolonged, usually greater than 20 minutes; b) new onset angina of at least canadian cardiovascular society grading scale (or ccs classification system) classification severity iii or greater; c) recent acceleration in angina accentuated by an increase in severity of at least 1 ccs class to at least ccs class iii. The biomarkers of necrosis are below the threshold of myocardial infarction. (nih roadmap cardiovascular data standards working group)
  • Precordial pain at rest, which may precede a myocardial infarction.
Applicable To
  • Accelerated angina
  • Crescendo angina
  • De novo effort angina
  • Intermediate coronary syndrome
  • Preinfarction syndrome
  • Worsening effort angina
Approximate Synonyms
  • Angina, unstable
ICD-10-CM I20.0 is grouped within Diagnostic Related Group (MS-DRG v34.0):
  • 311 Angina pectoris

Convert ICD-10-CM I20.0 to ICD-9-CM

The following ICD-10-CM Index entries contain back-references to ICD-10-CM I20.0: