Summary & Overview
CPT 0938T: Extended Ambulatory Cardiac Rhythm Monitoring Setup and Recording
CPT code 0938T captures the provider’s setup and connection of an external cardiac monitoring device that continuously records heart rhythm for more than 15 days and up to 30 days. This extended ambulatory monitoring code is important nationally as prolonged continuous rhythm recording is increasingly used to evaluate intermittent arrhythmias, cryptogenic stroke workups, and unexplained syncope, affecting utilization patterns and outpatient cardiac diagnostics.
Key payers covered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what 0938T represents clinically, the typical settings where the service is delivered, and which major payers are relevant to coverage and billing discussions. The publication also outlines benchmarking considerations and policy context relevant to extended ambulatory cardiac monitoring, and highlights common clinical scenarios where recording beyond 15 days up to 30 days is applied.
This summary is intended for billing, coding, and policy professionals seeking clear, national-level context about CPT code 0938T, its clinical purpose, and the payer landscape typically encountered for extended continuous cardiac rhythm monitoring services.
Billing Code Overview
CPT code 0938T describes the setup and connection of an external ambulatory cardiac monitoring device that continuously records a patient’s heart rhythm for more than 15 days and up to 30 days. The code covers the provider’s work to place and connect the monitoring device and the continuous recording period specified.
Service type: Extended ambulatory cardiac rhythm monitoring (continuous recorder setup and recording)
Typical site of service: Ambulatory clinic, outpatient cardiac monitoring center, or other noninpatient facility where wearable or external cardiac monitoring devices are applied and managed
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred by primary care or cardiology for evaluation of unexplained palpitations, syncope, presyncope, or intermittent near-fainting episodes. The patient has had prior short-term ambulatory monitoring (eg, 24–48 hour Holter) that did not capture symptoms or arrhythmia, and the clinician suspects infrequent paroxysmal atrial fibrillation, supraventricular tachycardia, or intermittent conduction block. The clinical workflow begins with the ordering clinician evaluating history and prior testing, obtaining informed consent, and scheduling device placement. On the day of service the provider or trained staff fits and programs the external continuous ambulatory ECG recorder, attaches electrodes, educates the patient on device care and symptom event reporting, and documents start time. The device continuously records heart rhythm for more than 15 days up to 30 days. The episode of care covered by 0938T is device setup and initiation of recording; subsequent device removal, data retrieval, transmission, and formal interpretation are reported separately. Typical site of service is an outpatient clinic, cardiac diagnostic lab, or ambulatory care center. Common patient follow-up includes remote or in-person device check, symptom-event correlation, and clinician review of the captured rhythm strip after monitoring completion.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |