ICD10
ICD-10 Code I49.4: Other and unspecified premature depolarization
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).
When is it used?
- May be used when a clinician documents other and unspecified premature depolarization in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
9Diseases of the circulatory system (I00-I99)
block
I30-I5AOther forms of heart disease
category
I49Other cardiac arrhythmias
currentI49
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
CardiologistGeneral Physician
Sibling codes
I49.0Ventricular fibrillation and flutterI49.1Atrial premature depolarizationbillableI49.2Junctional premature depolarizationbillableI49.3Ventricular premature depolarizationbillableI49.5Sick sinus syndromebillableI49.8Other specified cardiac arrhythmiasbillableI49.9Cardiac arrhythmia, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 251167004high
Aberrant premature complexes
Source: SNOMED International ICD-10 map
SNOMED_CT 251188008high
Atrial parasystole
Source: SNOMED International ICD-10 map
SNOMED_CT 164881000high
ECG: ectopic beats
Source: SNOMED International ICD-10 map
SNOMED_CT 427212000high
ECG: ectopic beats - premature atrial contraction
Source: SNOMED International ICD-10 map
SNOMED_CT 164883002high
ECG: extrasystole
Source: SNOMED International ICD-10 map
SNOMED_CT 63232000high
Multifocal premature beats
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
I49.4
Replacement codes
I49.40 — Unspecified premature depolarizationI49.49 — Other premature depolarization
Common synonyms
Other and unspecified premature depolarizationOther and premature depolarization
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.