Find policies, billing codes, payers, states, and providers

CPT 0904T: Reduced‑Lead ECG With Algorithm‑Derived 12‑Lead Tracing

CPT code 0904T denotes a device-based service in which a reduced‑lead ECG collects cardiac rhythm data and an algorithm generates a 12‑lead ECG tracing, with no provider interpretation included. Nationally, this code matters as use of remote and reduced‑lead ECG technologies expands in ambulatory and remote monitoring contexts, offering a means to increase access to near‑equivalent 12‑lead tracings while reducing electrode and setup complexity. Key payers considered in typical coverage discussions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find: a concise explanation of the clinical service represented by the code, typical sites of service and operational context, and an outline of what stakeholders commonly evaluate when assessing coverage and implementation (reimbursement benchmarks, coding and billing considerations, and clinical validation needs). The publication also summarizes common modifiers associated with procedural services where relevant and notes where input data is not available. This resource is intended for billing managers, clinical leaders, and policy analysts evaluating integration of derived 12‑lead ECG services into ambulatory and remote monitoring programs.

Customize your policy alerts

Sign up for cpt 0904T policy alerts

Get alerted when payer policies referencing 0904T are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Billing Code Overview

CPT code 0904T describes use of a reduced–lead electrocardiogram (ECG) device to collect cardiac rhythm data that is processed by an algorithm to generate a derived 12‑lead ECG tracing. The service supplies only the ECG tracing output; no interpretation or clinical report is provided with the code.

Service type: Device‑based diagnostic ECG acquisition with automated derivation of 12‑lead tracing

Typical site of service: Outpatient clinics, ambulatory diagnostic centers, physician offices, and remote monitoring settings where reduced‑lead ECG devices are used to capture rhythm data for algorithmic conversion to a 12‑lead tracing.

Find policies, billing codes, payers, states, and providers

CPT 0904T: Reduced‑Lead ECG With Algorithm‑Derived 12‑Lead Tracing

Customize your policy alerts

Sign up for cpt 0904T policy alerts

Get alerted when payer policies referencing 0904T are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Billing Code Overview

Service type: Device‑based diagnostic ECG acquisition with automated derivation of 12‑lead tracing

Clinical & Coding Specifications

Clinical Context

A 62-year-old patient with intermittent palpitations and a prior history of hypertension presents to an outpatient cardiology clinic. The provider applies a reduced‑lead ECG device that records rhythm strips over a short monitoring interval. The device transmits the reduced‑lead signals to an automated algorithm that reconstructs a 12‑lead ECG tracing. The clinic receives only the reconstructed ECG tracing without an interpretation or diagnostic report. Typical workflow: patient check‑in, brief symptom history and indication documented, device placement and recording performed by a trained technician or medical assistant, data sent to the algorithm for reconstruction, clinic staff downloads the 12‑lead tracing and files it in the medical record; a cardiologist may later review and provide a separate interpretation or use the tracing to determine need for further testing such as a full 12‑lead ECG, ambulatory monitor, or urgent evaluation.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	When work required for the procedure substantially exceeds typical requirements and documentation supports increased complexity.
`52`	Reduced services	When the service is partially reduced or not completed as normally provided.
`53`	Discontinued procedure	When monitoring or recording is started but terminated due to patient instability or other valid clinical reasons.
`80`	Assistant surgeon	When a qualified assistant participates in the technical performance of the procedure in an operative setting.
`82`	Assistant surgeon (when a qualified resident is not available)	When an assistant is required and a qualified resident is not available.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for Medicare	When the service is furnished by a PA, NP, or CNS and billed under their allowed rules to Medicare.
`TG`	Service performed under a registered nurse anesthetist (CRNA) direction (specific to some payors)	When the monitoring is performed in a setting where `TG` is appropriate per payor policy.

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiology	Cardiologists order and interpret ECG tracings and oversee cardiac rhythm evaluation.
207RP1001X	Clinical Cardiac Electrophysiology	Electrophysiologists use reconstructed tracings for arrhythmia assessment and procedural planning.
363L00000X	Vascular Cardiology	Providers focusing on noninvasive cardiac testing and outpatient rhythm monitoring.
246Q00000X	Physician Assistant	PAs commonly perform device placement and obtain ECG recordings in outpatient clinics.
363A00000X	Registered Nurse	RNs and cardiac technicians frequently perform the monitoring and data collection.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I48.0`	Paroxysmal atrial fibrillation	Intermittent palpitations and suspected AFib often prompt rhythm recording and reconstructed ECG review.
`I48.1`	Persistent atrial fibrillation	Patients with known persistent AFib may have monitoring to document rhythm stability or rate control.
`R00.0`	Tachycardia, unspecified	Symptoms of rapid heart rate commonly lead to ECG rhythm evaluation with reconstructed tracings.
`R00.1`	Bradycardia, unspecified	Episodes of slow heart rate identified on monitoring can be captured by reduced‑lead devices and reviewed on reconstructed 12‑lead tracings.
`R00.2`	Palpitations	Common presenting complaint leading to rhythm monitoring and reconstruction of 12‑lead ECG tracings for diagnostic evaluation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`0904T`	Reduced‑lead ECG used to collect rhythm data and reconstruct a 12‑lead ECG; tracing only provided without interpretation	Primary code for the reconstructed tracing service described.
`93000`	Electrocardiogram, routine ECG with at least 12 leads; with interpretation and report	Often performed when a formal 12‑lead ECG with interpretation is required after review of the reconstructed tracing.
`93005`	Electrocardiogram, tracing only, without interpretation and report	Alternative for situations where only an ECG tracing is provided without interpretation; used for standard 12‑lead tracings without report.
`93228`	External ambulatory ECG event monitor recording and review (e.g., single/auto trigger)	May be used when extended rhythm monitoring is indicated following abnormal reconstructed tracing.
`93229`	Analysis of continuous rhythm data for events, reviewed and interpreted	Used when algorithmic or manual analysis of extended monitoring is provided with interpretation.
`93010`	Interpretation and report only for electrocardiogram	Used when a clinician provides only the interpretation of an ECG tracing that was furnished by another party.

CPT 0903T: Algorithm‑Derived 12‑Lead ECG Interpretation

CPT-0905T-INTERPRETATION-REPORT-ALGORITHM-DERIVED-12-LEAD-ECG

CPT 0905T: Interpretation and Report of Algorithm-Derived 12‑Lead ECG

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	When work required for the procedure substantially exceeds typical requirements and documentation supports increased complexity.
`52`	Reduced services	When the service is partially reduced or not completed as normally provided.
`53`	Discontinued procedure	When monitoring or recording is started but terminated due to patient instability or other valid clinical reasons.
`80`	Assistant surgeon	When a qualified assistant participates in the technical performance of the procedure in an operative setting.
`82`	Assistant surgeon (when a qualified resident is not available)	When an assistant is required and a qualified resident is not available.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for Medicare	When the service is furnished by a PA, NP, or CNS and billed under their allowed rules to Medicare.
`TG`	Service performed under a registered nurse anesthetist (CRNA) direction (specific to some payors)	When the monitoring is performed in a setting where `TG` is appropriate per payor policy.

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiology	Cardiologists order and interpret ECG tracings and oversee cardiac rhythm evaluation.
207RP1001X	Clinical Cardiac Electrophysiology	Electrophysiologists use reconstructed tracings for arrhythmia assessment and procedural planning.
363L00000X	Vascular Cardiology	Providers focusing on noninvasive cardiac testing and outpatient rhythm monitoring.
246Q00000X	Physician Assistant	PAs commonly perform device placement and obtain ECG recordings in outpatient clinics.
363A00000X	Registered Nurse	RNs and cardiac technicians frequently perform the monitoring and data collection.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I48.0`	Paroxysmal atrial fibrillation	Intermittent palpitations and suspected AFib often prompt rhythm recording and reconstructed ECG review.
`I48.1`	Persistent atrial fibrillation	Patients with known persistent AFib may have monitoring to document rhythm stability or rate control.
`R00.0`	Tachycardia, unspecified	Symptoms of rapid heart rate commonly lead to ECG rhythm evaluation with reconstructed tracings.
`R00.1`	Bradycardia, unspecified	Episodes of slow heart rate identified on monitoring can be captured by reduced‑lead devices and reviewed on reconstructed 12‑lead tracings.
`R00.2`	Palpitations	Common presenting complaint leading to rhythm monitoring and reconstruction of 12‑lead ECG tracings for diagnostic evaluation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`0904T`	Reduced‑lead ECG used to collect rhythm data and reconstruct a 12‑lead ECG; tracing only provided without interpretation	Primary code for the reconstructed tracing service described.
`93000`	Electrocardiogram, routine ECG with at least 12 leads; with interpretation and report	Often performed when a formal 12‑lead ECG with interpretation is required after review of the reconstructed tracing.
`93005`	Electrocardiogram, tracing only, without interpretation and report	Alternative for situations where only an ECG tracing is provided without interpretation; used for standard 12‑lead tracings without report.
`93228`	External ambulatory ECG event monitor recording and review (e.g., single/auto trigger)	May be used when extended rhythm monitoring is indicated following abnormal reconstructed tracing.
`93229`	Analysis of continuous rhythm data for events, reviewed and interpreted	Used when algorithmic or manual analysis of extended monitoring is provided with interpretation.
`93010`	Interpretation and report only for electrocardiogram	Used when a clinician provides only the interpretation of an ECG tracing that was furnished by another party.

CPT 0903T: Algorithm‑Derived 12‑Lead ECG Interpretation

CPT-0905T-INTERPRETATION-REPORT-ALGORITHM-DERIVED-12-LEAD-ECG

CPT 0905T: Interpretation and Report of Algorithm-Derived 12‑Lead ECG

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 0904T: Reduced‑Lead ECG With Algorithm‑Derived 12‑Lead Tracing

Sign up for cpt 0904T policy alerts

Billing Code Overview

Catch payer policy changes before they impact reimbursement

Catch payer policy changes before they impact reimbursement

OpenPayer

CPT 0904T: Reduced‑Lead ECG With Algorithm‑Derived 12‑Lead Tracing

Sign up for cpt 0904T policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References