ICD-10 Code I44.4
Left anterior fascicular block
Valid for Submission
I44.4 is a billable code used to specify a medical diagnosis of left anterior fascicular block. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.
| ICD-10: | I44.4 |
| Short Description: | Left anterior fascicular block |
| Long Description: | Left anterior fascicular block |
Code Classification
- Diseases of the circulatory system (I00–I99)
Code History
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
(first year ICD-10-CM implemented into the HIPAA mandated code set) - FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
Information for Medical Professionals
Code Edits
The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:
- Questionable admission codes - Some diagnoses are not usually sufficient justification for admission to an acute care hospital. For example, if a patient is given code R030 for elevated blood pressure reading, without diagnosis of hypertension, then the patient would have a questionable admission, since elevated blood pressure reading is not normally sufficient justification for admission to a hospital.
Diagnostic Related Groups
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code I44.4 is grouped in the following groups for version MS-DRG V37.0 applicable from 10/01/2020 through 09/30/2020.
- 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 I44.4 to ICD-9
The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:
- 426.2 - Left bb hemiblock (Approximate Flag)
Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Bifascicular block
- Bifascicular block on electrocardiogram
- EKG: left bundle branch block
- EKG: left bundle branch block
- EKG: right bundle branch block
- Left anterior fascicular block
- Left anterior fascicular block
- Left anterior fascicular block on electrocardiogram
- Left anterior fascicular block on electrocardiogram
- Monofascicular block
- Monofascicular block
- Right bundle branch block AND left anterior fascicular block
- Right bundle branch block and left anterior fascicular block on electrocardiogram
- Right bundle branch block with left bundle branch block
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I44.4 are found in the index:
- - Block, blocked
- - bundle-branch (complete) (false) (incomplete) - I45.4
- - fascicular (left) - I44.60
- - anterior - I44.4
Information for Patients
Arrhythmia
An arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats too quickly, too slowly, or with an irregular pattern. When the heart beats faster than normal, it is called tachycardia. When the heart beats too slowly, it is called bradycardia. The most common type of arrhythmia is atrial fibrillation, which causes an irregular and fast heart beat.
Many factors can affect your heart's rhythm, such as having had a heart attack, smoking, congenital heart defects, and stress. Some substances or medicines may also cause arrhythmias.
Symptoms of arrhythmias include
- Fast or slow heart beat
- Skipping beats
- Lightheadedness or dizziness
- Chest pain
- Shortness of breath
- Sweating
Your doctor can run tests to find out if you have an arrhythmia. Treatment to restore a normal heart rhythm may include medicines, an implantable cardioverter-defibrillator (ICD) or pacemaker, or sometimes surgery.
NIH: National Heart, Lung, and Blood Institute
[Learn More]
ICD-10 Footnotes
General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
- Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
- No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
- Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.