AutoICD API

I20.0

Billable

Unstable angina

Unstable angina

Status

Billable / Specific

Block

I20-I25

Parent Code

I20

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Accelerated angina
  • Crescendo angina
  • De novo effort angina
  • Intermediate coronary syndrome
  • Preinfarction syndrome
  • Worsening effort angina

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • 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)

Excludes 2

Conditions not included here, but the patient may have both

  • 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.-)

Use Additional Code

Additional codes that should follow this code

  • 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)

Code Also

A second code may be required; sequencing depends on circumstances

  • the presence of hypertension (I10-I1A)

Also Known As / Clinical Terms

SNOMED CT

UMLS

Frequently Asked Questions

What is ICD-10 code I20.0?

ICD-10-CM code I20.0 represents "Unstable angina". It is a billable/specific code that can be used on a claim.

Is I20.0 a billable code?

Yes, I20.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is I20.0 in?

I20.0 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).

What codes cannot be used with I20.0?

I20.0 has Excludes1 notes indicating codes that cannot be used together with it, including: 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).

Are additional codes required with I20.0?

Yes, when using I20.0 you should also code: 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).

What SNOMED CT codes does I20.0 map to?

I20.0 maps to 8 SNOMED CT concepts: 170593007, 170597008, 434011000124101, 413838009, 4557003, and 3 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for I20.0?

I20.0 is linked to 5 UMLS Concept Unique Identifiers: C2882087, C0002965, C1394765, C0086666, C2882088. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.