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ICD-10-CM Code I20.9
Angina pectoris, unspecified

BILLABLE
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Adult Only
Adult Only
Code is only used for patients 15 years old or older.
| ICD-10 from 2011 - 2016

I20.9 is a billable ICD code used to specify a diagnosis of angina pectoris, unspecified. A 'billable code' is detailed enough to be used to specify a medical diagnosis.


The ICD code I20 is used to code Coronary artery disease

Coronary artery disease (CAD), also known as ischemic heart disease (IHD), is a group of diseases that includes: stable angina, unstable angina, myocardial infarction, and sudden coronary death. It is within the group of cardiovascular diseases of which it is the most common type. A common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Occasionally it may feel like heartburn. Usually symptoms occur with exercise or emotional stress, last less than a few minutes, and get better with rest. Shortness of breath may also occur and sometimes no symptoms are present. The first sign is occasionally a heart attack. Other complications include heart failure or an irregular heartbeat.

Specialty: Cardiology, Cardiac Surgery
MeSH Codes: D003324, D003324, D003324, D003324, D003324, D003324
ICD 9 Codes: 410, 411, 412, 413, 414, 429.2

Illustration depicting atherosclerosis in a coronary artery.

Source: Wikipedia

Coding Notes for I20.9 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Angina NOS
Anginal syndrome
Cardiac angina
Ischemic chest pain

MS-DRG Mapping

  • DRG Group #311 - Angina pectoris.

Coding Advice SNOMET-CT

  • Possible requirement for additional code to fully describe disease or condition

ICD-10-CM Alphabetical Index References for 'I20.9 - Angina pectoris, unspecified'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code I20.9. Click on any term below to browse the alphabetical index.

Angina(attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) (I20.9)
Angina(attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) (I20.9) +

Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)

Other and unspecified angina pectoris (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code I20.9 and a single ICD9 code, 413.9 is an approximate match for comparison and conversion purposes.


Parent Code: I20 - Angina pectoris

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/I209