ICD10BillableValid for clinical use
ICD-10 Code I48.0: Paroxysmal atrial fibrillation
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 paroxysmal atrial fibrillation in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
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.
Code hierarchy
chapter
9Diseases of the circulatory system (I00-I99)
block
I30-I5AOther forms of heart disease
category
I48Atrial fibrillation and flutter
currentI48
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
CardiologistGeneral Physician
Related codes
Sibling codes
Coverage-related procedures and services
CPT 93228high
EXTERNAL MOBILE CARDIOVASCULAR TELEMETRY WITH ELECTROCARDIOGRAPHIC RECORDING, CONCURRENT COMPUTERIZED REAL TIME DATA ANALYSIS AND GREATER THAN 24 HOURS OF ACCESSIBLE ECG DATA STORAGE (RETRIEVABLE WITH QUERY) WITH ECG TRIGGERED AND PATIENT SELECTED EVENTS TRANSMITTED TO A REMOTE ATTENDED SURVEILLANCE CENTER FOR UP TO 30 DAYS; REVIEW AND INTERPRETATION WITH REPORT BY A PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL
Source: CMS coverage guidance
CPT 93229high
EXTERNAL MOBILE CARDIOVASCULAR TELEMETRY WITH ELECTROCARDIOGRAPHIC RECORDING, CONCURRENT COMPUTERIZED REAL TIME DATA ANALYSIS AND GREATER THAN 24 HOURS OF ACCESSIBLE ECG DATA STORAGE (RETRIEVABLE WITH QUERY) WITH ECG TRIGGERED AND PATIENT SELECTED EVENTS TRANSMITTED TO A REMOTE ATTENDED SURVEILLANCE CENTER FOR UP TO 30 DAYS; TECHNICAL SUPPORT FOR CONNECTION AND PATIENT INSTRUCTIONS FOR USE, ATTENDED SURVEILLANCE, ANALYSIS AND TRANSMISSION OF DAILY AND EMERGENT DATA REPORTS AS PRESCRIBED BY A PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL
Source: CMS coverage guidance
CPT 93268high
EXTERNAL PATIENT AND, WHEN PERFORMED, AUTO ACTIVATED ELECTROCARDIOGRAPHIC RHYTHM DERIVED EVENT RECORDING WITH SYMPTOM-RELATED MEMORY LOOP WITH REMOTE DOWNLOAD CAPABILITY UP TO 30 DAYS, 24-HOUR ATTENDED MONITORING; INCLUDES TRANSMISSION, REVIEW AND INTERPRETATION BY A PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL
Source: CMS coverage guidance
CPT 93270high
EXTERNAL PATIENT AND, WHEN PERFORMED, AUTO ACTIVATED ELECTROCARDIOGRAPHIC RHYTHM DERIVED EVENT RECORDING WITH SYMPTOM-RELATED MEMORY LOOP WITH REMOTE DOWNLOAD CAPABILITY UP TO 30 DAYS, 24-HOUR ATTENDED MONITORING; RECORDING (INCLUDES CONNECTION, RECORDING, AND DISCONNECTION)
Source: CMS coverage guidance
CPT 93272high
EXTERNAL PATIENT AND, WHEN PERFORMED, AUTO ACTIVATED ELECTROCARDIOGRAPHIC RHYTHM DERIVED EVENT RECORDING WITH SYMPTOM-RELATED MEMORY LOOP WITH REMOTE DOWNLOAD CAPABILITY UP TO 30 DAYS, 24-HOUR ATTENDED MONITORING; REVIEW AND INTERPRETATION BY A PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL
Source: CMS coverage guidance
CPT 93271high
EXTERNAL PATIENT AND, WHEN PERFORMED, AUTO ACTIVATED ELECTROCARDIOGRAPHIC RHYTHM DERIVED EVENT RECORDING WITH SYMPTOM-RELATED MEMORY LOOP WITH REMOTE DOWNLOAD CAPABILITY UP TO 30 DAYS, 24-HOUR ATTENDED MONITORING; TRANSMISSION AND ANALYSIS
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 282825002high
Paroxysmal atrial fibrillation
Source: SNOMED International ICD-10 map
SNOMED_CT 467643831000119105high
Paroxysmal atrial fibrillation due to heart valve disorder
Source: SNOMED International ICD-10 map
SNOMED_CT 1010405004high
Paroxysmal atrial fibrillation with rapid ventricular response
Source: SNOMED International ICD-10 map
SNOMED_CT 427665004high
Paroxysmal atrial flutter
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
I48.0
Common synonyms
Paroxysmal atrial fibrillation
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.