CurrentCentenePolicy CP MP.113

Holter Monitors (ambulatory ECG up to 48 hours)

Medical necessity guidelines for ambulatory ECG (Holter) monitoring up to 48 hours for pediatric and adult members/enrollees, describing covered indications and coding. Applies to Centene-affiliated health plans and providers submitting coverage requests.

Policy Summary

PayerCentene

PolicyHolter Monitors (ambulatory ECG up to 48 hours)

Policy CodePolicy CP MP.113

Change TypeNo material clinical or coverage changes

Effective Date

Next Review Date

Key ActionInclude one of the CPT codes 93224–93227 and an appropriate supporting ICD-10 diagnosis when submitting prior authorization or claims for 24–48 hour Holter monitoring.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

24-48hduration of Holter monitoring addressed

Adults & Pediatricspopulation groups

Multiple ICD-10supporting diagnosis codes

CPT 93224-27procedural codes

Medical Necessity — Holter (Ambulatory ECG up to 48 hours)

Policy Summary

PayerCentene

PolicyHolter Monitors (ambulatory ECG up to 48 hours)

Policy CodePolicy CP MP.113

Change TypeNo material clinical or coverage changes

Effective Date

Next Review Date

Key ActionInclude one of the CPT codes 93224–93227 and an appropriate supporting ICD-10 diagnosis when submitting prior authorization or claims for 24–48 hour Holter monitoring.

SourceLink

On This Page

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Adult indications: Evaluation of unexplained syncope, near-syncope, episodic dizziness, recurrent palpitations, episodic shortness of breath or chest pain; evaluation of neurological events when transient atrial fibrillation or flutter is suspected; evaluation of members/enrollees with cardiomyopathy, or a first-degree relative with arrhythmogenic right ventricular cardiomyopathy; evaluation of syncope, near-syncope, episodic dizziness, or palpitations in whom a probable cause other than an arrhythmia has been identified but symptoms persist despite treatment of this other cause; evaluation of possible or documented prolonged QT syndromes; assessment of efficacy of medication for arrhythmia treatment when baseline arrhythmia frequency is reproducible and of sufficient frequency to permit analysis; to screen for asymptomatic arrhythmia in members/enrollees with Brugada syndrome; detection of proarrhythmic responses to antiarrhythmic therapy in high-risk members/enrollees; assessment of pacemaker or implantable cardioverter-defibrillator (ICD) function when frequent palpitations, syncope, or near-syncope occur and to assist programming of enhanced features; evaluation of suspected pacemaker or ICD component failure or malfunction when device interrogation is inconclusive; assessment of suspected variant angina; assessment of efficacy of adjunctive medications in members/enrollees receiving frequent ICD therapy; evaluation of recurrent chronic heart failure when arrhythmia is suspected; evaluation of possible arrhythmias after ablation proceduresN/A

Follow device/function and arrhythmia assessment indications listed in policy

Pediatric medical necessity indications

Covered when ANY of the following pediatric indications are present for 24-48 hour monitoring

Pediatric indications: Evaluation of syncope or near-syncope associated with exertion when the cause is not established; evaluation of syncope, near-syncope, or dizziness in children with identified cardiac disease, previously documented arrhythmia, or pacemaker dependency; evaluation of unexplained syncope, near-syncope, or sustained palpitations when there is no overt clinical evidence of heart disease; evaluation of patients with cardiomyopathy, or a first-degree relative with arrhythmogenic right ventricular cardiomyopathy; assessment of efficacy of medications for arrhythmia following initiation of treatment or during somatic growth; evaluation of possible or documented prolonged QT syndromes; evaluation of asymptomatic congenital complete atrioventricular (AV) block (non-paced); evaluation of palpitations in a member/enrollee after surgery for congenital heart disease with significant residual hemodynamic abnormalities; evaluation of cardiac rhythm after transient AV block associated with heart surgery or catheter ablation; evaluation of rate-responsive or physiologic pacing function in symptomatic members/enrolleesN/A

Pediatric-specific uses include monitoring related to growth, post-surgical surveillance, and risk stratification

Procedure and Diagnosis Codes

Covered CPT CodesCPTCovered

93224	External electrocardiographic recording up to 48 hours by continuous rhythm recording and storage; includes recording, scanning analysis with report, review and interpretation by a physician Or other qualified health care professional
93225	External electrocardiographic recording up to 48 hours by continuous rhythm recording and storage; recording (includes connection, recording, and disconnection)
93226	External electrocardiographic recording up to 48 hours by continuous rhythm recording and storage; scanning analysis with report
93227	External electrocardiographic recording up to 48 hours by continuous rhythm recording and storage; review and interpretation by a physician or other qualified health care professional

ICD-10 codes that support coverageICD-10

G45.9	Transient cerebral ischemic attack, unspecified
G71.00-G71.09	Muscular dystrophy
G99.0	Autonomic neuropathy in diseases classified elsewhere
I20.0-I20.9	Angina pectoris
I24.0-I24.9	Other acute ischemic heart diseases
I25.10	Atherosclerotic heart disease of native coronary artery without angina pectoris
I25.112	Atherosclerotic heart disease of native coronary artery with refractory angina
I25.70-I25.79	Atherosclerosis of coronary artery bypass graft(s) and related codes
I34.0-I34.9	Nonrheumatic mitral valve disorders
I35.0-I35.9	Nonrheumatic aortic valve disorders

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Provider Responsibilities, Prior Authorization and Billing

Prior Authorization

Prior Authorization Required

Prior authorization/claim submission should include one of the referenced CPT codes (93224-93227) and an appropriate supporting ICD-10 diagnosis that documents the medical indication for monitoring. Providers must verify eligibility and authorization requirements with the member's health plan prior to service. Inclusion of clinical documentation (office notes, history of present illness, symptom frequency/duration, prior testing results, and rationale for chosen monitoring duration) may be requested to support medical necessity.

Include one of CPT 93224, 93225, 93226, or 93227 on the claim
Attach appropriate ICD-10 diagnosis code(s) supporting the indication
Confirm and obtain prior authorization when required by the member's plan prior to ordering or performing Holter monitoring
Retain and provide clinical notes correlating symptoms with need for 24–48 hour monitoring if requested

Documentation Required

Coding and Documentation

Claims should reference the appropriate CPT codes (93224–93227) and the supporting ICD-10 diagnosis codes listed in the policy. Providers should submit documentation that supports the medical necessity of the monitoring service, including symptoms (for example syncope, near-syncope, palpitations), relevant cardiac history, prior diagnostic testing results, and the clinical reason for selecting 24–48 hour ambulatory monitoring. Failure to supply adequate documentation may result in claim denial or request for additional information.

Bill using the appropriate CPT code for up to 48 hours: 93224, 93225, 93226, or 93227
Ensure claims include supporting ICD-10 diagnosis codes that match the documented indication
Provide clinical documentation upon request to substantiate medical necessity to avoid denial

Note

Initial Monitoring Preference

Continuous Holter monitoring for 24 to 48 hours is the preferred initial monitoring approach for members with daily or near‑daily unexplained symptoms and for assessing efficacy of antiarrhythmic therapy or device function. Longer duration monitoring may be considered only when clinically indicated per policy criteria and clinical decision support.

Use 24–48 hour continuous Holter monitoring as the initial test for daily/near‑daily unexplained symptoms
Document symptom frequency and clinical rationale for the selected monitoring duration
Consider extended or alternative ambulatory ECG modalities only when policy criteria justify longer monitoring

Clinical Background

Ambulatory electrocardiographic (ECG) monitoring, commonly called Holter monitoring, provides continuous external cardiac rhythm recording typically for 24 to 48 hours to correlate patient-reported symptoms (for example, palpitations, syncope, near‑syncope, dizziness, chest pain, or shortness of breath) with arrhythmias, to assess device function, and to evaluate treatment efficacy.

Holter monitoring is noninvasive and records continuous rhythm data with event markers for later analysis and physician interpretation; it is often the most practical initial monitoring approach for patients with daily or near‑daily unexplained symptoms and for assessing response to therapy.

In pediatric patients Holter monitoring has additional applications reflecting growth and congenital heart disease considerations, including post‑surgical rhythm surveillance, medication efficacy during growth, evaluation of congenital AV block, and risk stratification for inherited arrhythmia syndromes.

Key Terms and Definitions

Ambulatory ECG / Holter monitoring

DefinitionContinuous external electrocardiographic recording over a period (typically 24 to 48 hours) with event markers for symptom correlation and subsequent analysis.

PurposeEvaluate and diagnose cardiac arrhythmias or conduction abnormalities by correlating symptoms (palpitations, syncope/near‑syncope, dizziness, shortness of breath, chest pain, episodic fatigue) with ECG findings.

Common use caseMost practical initial approach for daily or near‑daily unexplained symptoms and for assessing efficacy of medications or other treatments for arrhythmias.

Device featuresMember/enrollee‑activated event marker to identify symptom timing for later analysis of recorded data.

Possible outcomes of monitoring(1) Symptom with arrhythmia documented (directs therapy); (2) Symptom without arrhythmia (symptoms not arrhythmic); (3) Asymptomatic arrhythmia detected; (4) No symptoms and no arrhythmia (non‑diagnostic).

ST‑segment depression on ambulatory ECG

DefinitionST‑segment depression on ambulatory ECG is a commonly encountered sign suggestive of myocardial ischemia that requires clinical correlation because repolarization abnormalities can occur for reasons other than ischemia.

Clinical considerationST‑segment changes on ambulatory ECG should be interpreted in context; other conditions may cause repolarization abnormalities affecting predictive value.

Diagnostic utilityAmbulatory ECG can provide accurate and clinically meaningful information about myocardial ischemia, including detection of transmural ischemia in variant angina or high‑grade proximal stenosis.

Role in managementFindings may prompt further evaluation or directed therapy for ischemia when correlated with clinical context and other diagnostic data.