Summary & Overview

CPT 77048: Breast MRI (single breast), Contrast-Enhanced 3D

CPT code 77048 denotes a diagnostic breast MRI of one breast that generates three-dimensional images, performed with and without intravenous contrast and with optional real-time computer-aided detection (CAD). This imaging code is important nationally for advanced breast cancer detection, problem-solving when mammography or ultrasound is inconclusive, and for preoperative planning in selected patients. Breast MRI utilization affects radiology workflows, imaging center capacity, and payer coverage policies given its higher resource intensity compared with standard mammography.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of typical coverage contexts, utilization benchmarks, and relevant clinical indications associated with the code. The publication outlines payment considerations, common billing modifiers and claim components, and how this service aligns with diagnostic imaging pathways for breast disease.

This report provides clinicians, billing professionals, and policy analysts with: national context for CPT code 77048; typical sites of service and service type; guidance on documentation elements that support medical necessity; and a summary of payer coverage patterns and reimbursement framing. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare77048CPTbreast MRIdiagnostic imagingcontrast-enhanced MRIradiologycomputer-aided detectionoutpatient imaging

Billing Code Overview

CPT code 77048 describes a breast magnetic resonance imaging (MRI) study of a single breast, performed using an external magnetic field and radiofrequency waves to generate three-dimensional images. The procedure includes imaging with and without intravenous contrast and may include real-time computer-aided detection (CAD) as part of image acquisition or interpretation.

Service type: Diagnostic imaging — breast MRI (single breast), contrast-enhanced, 3D

Typical site of service: Outpatient imaging center or hospital radiology department, where MRI scanners and contrast administration are available for advanced breast imaging.

Clinical & Coding Specifications

Clinical Context

A typical patient is a woman referred for a diagnostic breast MRI of a single breast to evaluate a suspicious finding identified on mammography or ultrasound, to further stage known breast cancer, or to assess the extent of disease prior to surgery. The patient arrives to the outpatient imaging center or hospital radiology department, completes MRI safety screening (implants, pacemakers, renal function for gadolinium), and IV access is obtained for contrast administration when indicated. The technologist positions the patient prone in a dedicated breast coil, and the radiologist or MRI technologist performs a contrast-enhanced 3D breast MRI sequence with and without intravenous gadolinium-based contrast, applying an external magnetic field and radiofrequency pulses to generate multiplanar and volumetric images. Real-time computer-aided detection (CAD) software may be used during acquisition or post-processing to aid lesion detection. The radiologist interprets the study, documents findings, and issues a report for the referring clinician. Typical sites of service are outpatient imaging centers or hospital-based radiology departments for diagnostic or preoperative staging purposes. Indications include evaluation of a suspicious mass, staging of newly diagnosed breast cancer, assessment of implant integrity when contrast is used, and problem-solving when other modalities are inconclusive. The service corresponds to imaging of one breast as described by the CPT descriptor and is billed when unilateral breast MRI is performed.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	When billing only the interpreting physician's professional component separate from technical component.
`TC`	Technical component	When billing only the facility/technical portion (equipment, technologist) separate from the professional interpretation.
`LT`	Left side	When the MRI was performed on the left breast.
`RT`	Right side	When the MRI was performed on the right breast.
`59`	Distinct procedural service	When a separate and distinct MRI procedure is performed on the same day that is not bundled with this service.
`50`	Bilateral procedure	If bilateral breast MRI is performed (note: use only if code descriptor allows bilateral application; otherwise report bilateral code or two unilateral codes per payer rules).
`52`	Reduced services	When the MRI was partially reduced or aborted and fewer images/sequence acquisition occurred.
`53`	Discontinued procedure	When the MRI was discontinued due to patient instability or safety concerns before completion.
`76`	Repeat procedure by same physician	When the same physician must repeat the MRI on the same day for technical reasons (Note: not listed in provided modifiers; excluded).
`77`	Repeat procedure by another physician	When a repeat MRI is performed by a different physician (Note: not listed in provided modifiers; excluded).
`73`	Discontinued outpatient hospital/ambulatory surgery center procedure prior to anesthesia	When the outpatient imaging procedure was cancelled after the patient was prepared but prior to performance (rare for MRI).
`78`	Unplanned return to the operating/procedure room	Not typically applicable to diagnostic MRI; use only if relevant to interventional MRI-guided procedure.
`62`	Two surgeons	Not typically applicable; relevant when two surgeons share a surgical procedure, generally not used for imaging.

Taxonomy Code	Specialty	Notes
2085R0203X	Diagnostic Radiology	Radiologists who interpret breast MRI studies.
2084P0800X	Vascular & Interventional Radiology	Interventional radiologists may be involved when MRI-guided biopsy or procedures are performed (related workflows).
207SG0100X	Surgery - General	Breast surgeons order and act on MRI findings for surgical planning.
261QM0801X	Obstetrics & Gynecology	Gynecologic oncologists or breast specialists may coordinate imaging in certain practices.
2084P0803X	Neuroradiology (not typical)	Occasionally involved when advanced MRI techniques are applied; primarily diagnostic radiology performs breast MRI.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C50.912`	Malignant neoplasm of unspecified site of left female breast	Indicates known breast cancer where MRI is used for extent of disease and staging of the left breast.
`C50.911`	Malignant neoplasm of unspecified site of right female breast	Indicates known breast cancer where MRI is used for extent of disease and staging of the right breast.
`N63`	Unspecified lump in breast	Common indication for diagnostic breast MRI to characterize a palpable mass not fully evaluated by mammography/ultrasound.
`R92.2`	Inconclusive mammogram	MRI is used to further evaluate findings when mammography is inconclusive.
`Z85.3`	Personal history of malignant neoplasm of breast	Surveillance and problem-solving in patients with prior breast cancer; MRI may be used for high-risk surveillance or evaluation of recurrence.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`77047`	Magnetic resonance imaging, breast, unilateral; without contrast material	May be performed when contrast is contraindicated or a non-contrast study is sufficient; often an alternative to `77048`.
`77049`	Magnetic resonance imaging, breast, bilateral; without and with contrast material	Performed when both breasts require contrast-enhanced evaluation; billed instead of two unilateral `77048` in bilateral cases per payer rules.
`19083`	Biopsy, breast, MRI-guided, percutaneous, one or more lesions	Performed following MRI when a suspicious lesion identified on MRI requires tissue sampling; often scheduled after diagnostic MRI.
`76000`	Fluoroscopic guidance for needle placement (e.g., biopsy)	May be used during MRI-guided procedures when additional image guidance modalities are required; ancillary to MRI study.
`76376`	3D rendering with interpretation and reporting of CT/MRI volumetric data	May be billed for advanced post-processing or 3D reconstruction of breast MRI datasets when performed and reported separately.