1. ICD-10-CM Codes
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2. I00-I99
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3. I30-I5A
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4. I45-
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5. 2023 ICD-10-CM Diagnosis Code I45.9

2023 ICD-10-CM Diagnosis Code I45.9

Conduction disorder, unspecified

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

• I45.9 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 I45.9 became effective on October 1, 2022.
• This is the American ICD-10-CM version of I45.9 - other international versions of ICD-10 I45.9 may differ.

• Cardiac dysrhythmia (heart rhythm disorder)
• Conduction disorder of the heart

• A condition of fainting spells caused by heart block, often an atrioventricular block, that leads to bradycardia and drop in cardiac output. When the cardiac output becomes too low, the patient faints (syncope). In some cases, the syncope attacks are transient and in others cases repetitive and persistent.
• A disorder affecting the conduction system that sends electrical signals in the myocardium.
• A disorder characterized by pathological irregularities in the cardiac conduction system.
• Abnormality in rhythm of heartbeat, including rate, regularity, and/or sequence of activation abnormalities
• An episode of sudden and transient loss of consciousness sometimes associated with seizures. It is caused by a sudden decrease of the cardiac output that results from a sudden cardiac dysrhythmia. Typically patients develop an initial pallor, followed by facial flush during recovery.
• An impairment of transmission of the cardiac electrical impulse along the fibers normally responsible impulse propagation.
• Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the sinoatrial node and the right atrium (sa block) or between atria and ventricles (av block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.
• Impairment of conduction in heart excitation; often applied specifically to atrioventricular heart block.

• 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 I45.9 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

• Type 1 Excludes: R55
  , I45.5
  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-)
  ICD-10-CM Diagnosis Code I45.5

  Other specified heart block

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

  Applicable To

  • Sinoatrial block
  • Sinoauricular block

  Type 1 Excludes

  • heart block NOS (I45.9)
• Use Additional: H49.81
  ICD-10-CM Diagnosis Code H49.81

  Kearns-Sayre syndrome

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

  Applicable To

  • Progressive external ophthalmoplegia with pigmentary retinopathy

  Use Additional

  • code for other manifestation, such as:
  • heart block (I45.9)

• Adams-Stokes I45.9 (-Morgagni)
• Arrhythmia (auricle)(cardiac)(juvenile)(nodal)(reflex)(supraventricular)(transitory)(ventricle) I49.9
  ICD-10-CM Diagnosis Code I49.9

  Cardiac arrhythmia, unspecified

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

  Applicable To

  • Arrhythmia (cardiac) NOS
  • block I45.9
• Attack, attacks
  • Adams-Stokes I45.9
  • Stokes-Adams I45.9
• Block, blocked
  • conduction I45.9
  • heart I45.9
  • arrhythmic I45.9
  • cardiac I45.9
• Defect, defective Q89.9
  ICD-10-CM Diagnosis Code Q89.9

  Congenital malformation, unspecified

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

  Applicable To

  • Congenital anomaly NOS
  • Congenital deformity NOS
  • conduction (heart) I45.9
• Delay, delayed
  • conduction I45.9 (cardiac) (ventricular)
• Disease, diseased - see also Syndrome
  • Adams-Stokes I45.9 (-Morgagni) (syncope with heart block)
  • Morgagni-Adams-Stokes I45.9 (syncope with heart block)
  • Stokes-Adams I45.9 (syncope with heart block)
• Disorder (of) - see also Disease
  • conduction, heart I45.9
• Dropped heart beats I45.9
• Morgagni-Stokes-Adams syndrome I45.9
• Spens' syndrome I45.9 (syncope with heart block)
• Stokes-Adams disease or syndrome I45.9
• Syndrome - see also Disease
  • Adams-Stokes I45.9 (-Morgagni)
  • Morgagni-Adams-Stokes I45.9
  • Spen's I45.9
  • Stokes I45.9 (-Adams)

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