CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

CPT code 0904T describes use of a reduced‑lead electrocardiogram (ECG) device to collect heart rhythm data that an algorithm reconstructs into a 12‑lead ECG tracing; the service is a diagnostic ECG acquisition and algorithmic reconstruction provided typically as an ambulatory or outpatient diagnostic cardiac test, with the output limited to the electrocardiographic tracing only (no interpretation or report).

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CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

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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.

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.

Related Modifiers

5 rows

Modifier	Description	When to Use
22	Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…	- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
53	Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…	- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
80	CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…	- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
82	Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…	- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiovascular Disease Physician	An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
207RP1001X	Pulmonary Disease Physician	An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
246Q00000X	Pathology Specialist/Technologist	(1) An individual educated and trained in clinical chemistry, microbiology or other biological sciences; and in gathering data on the blood, tissues, …
363A00000X	Physician Assistant	A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
2084N0008X	Neuromuscular Medicine (Psychiatry & Neurology) Physician	A neurologist or child neurologist who specializes in the diagnosis and management of disorders of nerve, muscle or neuromuscular junction, including …
175M00000X	Lay Midwife	A person qualified by experience and limited specialized training to provide obstetric and neo-natal care in the management of women having normal pre…
2082S0105X	Surgery of the Hand (Plastic Surgery) Physician	A plastic surgeon with additional training in the investigation, preservation, and restoration by medical, surgical and rehabilitative means of all st…

Related ICD-10-CM Codes

29 rows

ICD-10-CM Code	Description
E11.9	Type 2 diabetes mellitus without complications
E66.9	Obesity, unspecified
E78.5	Hyperlipidemia, unspecified
F41.9	Anxiety disorder, unspecified
G45.8	Other transient cerebral ischemic attacks and related syndromes
G45.9	Transient cerebral ischemic attack, unspecified
I20.9	Angina pectoris, unspecified
I21.3	ST elevation (STEMI) myocardial infarction of unspecified site
I25.10	Atherosclerotic heart disease of native coronary artery without angina pectoris
I34.0	Nonrheumatic mitral (valve) insufficiency

Showing 1–10 of 29

CPT 0903T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction and Interpretation

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

CPT 0905T: Interpretation of Algorithm‑Generated 12‑Lead ECG from Reduced‑Lead Recording

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

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.

Related Modifiers

5 rows

Modifier	Description	When to Use
22	Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…	- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
53	Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…	- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
80	CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…	- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
82	Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…	- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiovascular Disease Physician	An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
207RP1001X	Pulmonary Disease Physician	An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
246Q00000X	Pathology Specialist/Technologist	(1) An individual educated and trained in clinical chemistry, microbiology or other biological sciences; and in gathering data on the blood, tissues, …
363A00000X	Physician Assistant	A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
2084N0008X	Neuromuscular Medicine (Psychiatry & Neurology) Physician	A neurologist or child neurologist who specializes in the diagnosis and management of disorders of nerve, muscle or neuromuscular junction, including …
175M00000X	Lay Midwife	A person qualified by experience and limited specialized training to provide obstetric and neo-natal care in the management of women having normal pre…
2082S0105X	Surgery of the Hand (Plastic Surgery) Physician	A plastic surgeon with additional training in the investigation, preservation, and restoration by medical, surgical and rehabilitative means of all st…

Related ICD-10-CM Codes

29 rows

ICD-10-CM Code	Description
E11.9	Type 2 diabetes mellitus without complications
E66.9	Obesity, unspecified
E78.5	Hyperlipidemia, unspecified
F41.9	Anxiety disorder, unspecified
G45.8	Other transient cerebral ischemic attacks and related syndromes
G45.9	Transient cerebral ischemic attack, unspecified
I20.9	Angina pectoris, unspecified
I21.3	ST elevation (STEMI) myocardial infarction of unspecified site
I25.10	Atherosclerotic heart disease of native coronary artery without angina pectoris
I34.0	Nonrheumatic mitral (valve) insufficiency

Showing 1–10 of 29

CPT 0903T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction and Interpretation

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

CPT 0905T: Interpretation of Algorithm‑Generated 12‑Lead ECG from Reduced‑Lead Recording

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

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CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

Sign up for cpt 0904T policy alerts

CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

Sign up for cpt 0904T policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What does CPT 0904T describe?

When would a clinic use 0904T instead of 93000 or 93005?

Can a clinician bill separately for interpretation of the tracing produced under 0904T?

What clinical situations are commonly associated with use of this reduced‑lead reconstructed tracing?

How does 0904T relate to ambulatory cardiac monitoring codes like 93228 and 93229?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What does CPT 0904T describe?

When would a clinic use 0904T instead of 93000 or 93005?

Can a clinician bill separately for interpretation of the tracing produced under 0904T?

What clinical situations are commonly associated with use of this reduced‑lead reconstructed tracing?

How does 0904T relate to ambulatory cardiac monitoring codes like 93228 and 93229?

References