1. ICD-10-CM Codes
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2. I00-I99
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3. I30-I5A
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4. I49-
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5. 2023 ICD-10-CM Diagnosis Code I49.5

2023 ICD-10-CM Diagnosis Code I49.5

Sick sinus syndrome

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• I49.5 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 I49.5 became effective on October 1, 2022.
• This is the American ICD-10-CM version of I49.5 - other international versions of ICD-10 I49.5 may differ.

• Bradycardia tachycardia syndrome
• Sinus node dysfunction
• Tachycardia-bradycardia

• A condition caused by dysfunctions related to the sinoatrial node including impulse generation (cardiac sinus arrest) and impulse conduction (sinoatrial exit block). It is characterized by persistent bradycardia, chronic atrial fibrillation, and failure to resume sinus rhythm following cardioversion. This syndrome can be congenital or acquired, particularly after surgical correction for heart defects.
• A constellation of signs and symptoms which may include syncope, fatigue, dizziness, and alternating periods of bradycardia and atrial tachycardia, which is caused by sinoatrial node dysfunction.
• A disorder characterized by a dysrhythmia with alternating periods of bradycardia and atrial tachycardia accompanied by syncope, fatigue and dizziness.

• 308 Cardiac arrhythmia and conduction disorders with mcc
• 309 Cardiac arrhythmia and conduction disorders with cc
• 310 Cardiac arrhythmia and conduction disorders without cc/mcc

Convert I49.5 to ICD-9-CM

• 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

• Bradycardia (sinoatrial) (sinus) (vagal) R00.1
  ICD-10-CM Diagnosis Code R00.1

  Bradycardia, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Sinoatrial bradycardia
  • Sinus bradycardia
  • Slow heart beat
  • Vagal bradycardia

  Type 1 Excludes

  • neonatal bradycardia (P29.12)

  Use Additional

  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • tachycardia syndrome I49.5
• Bradytachycardia I49.5
• Dysfunction
  • sinoatrial node I49.5
• Pause, sinoatrial I49.5
• Sick R69
  ICD-10-CM Diagnosis Code R69

  Illness, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Unknown and unspecified cases of morbidity
  • sinus I49.5 (syndrome)
• Syndrome - see also Disease
  • sick
    • sinus I49.5
  • bradycardia-tachycardia I49.5
  • tachycardia-bradycardia I49.5
• Tachycardia R00.0
  ICD-10-CM Diagnosis Code R00.0

  Tachycardia, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Rapid heart beat
  • Sinoauricular tachycardia NOS
  • Sinus [sinusal] tachycardia NOS

  Type 1 Excludes

  • neonatal tachycardia (P29.11)
  • paroxysmal tachycardia (I47.-)
  • paroxysmal (sustained) (nonsustained) I47.9
    ICD-10-CM Diagnosis Code I47.9

    Paroxysmal tachycardia, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Bouveret (-Hoffman) syndrome
    • with sinus bradycardia I49.5
  • sick sinus I49.5

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