CPT 0546T: Radiofrequency Spectroscopy for Margin Assessment After Partial Mastectomy - OpenPayer

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Summary & Overview

CPT 0546T: Radiofrequency Spectroscopy for Margin Assessment After Partial Mastectomy

CPT code 0546T covers intraoperative radiofrequency spectroscopy imaging used after a partial mastectomy or lumpectomy to assess whether surgical margins are free of cancer. This technology-driven adjunct aims to reduce re-excision rates by providing real-time information about margin status, making it relevant for surgical oncology practice and payers overseeing breast-conserving therapy. Nationally, the code reflects growing interest in intraoperative margin assessment tools and their potential impact on quality measures and episode costs.

Key payers in the coverage landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of what the code represents, typical sites of service, and the clinical context for use. The publication outlines coverage and reimbursement benchmarks where available, highlights policy developments affecting adoption and coding, and situates the service within surgical workflow for breast-conserving procedures.

This summary presents clinical and billing context for administrators, coding staff, and policy analysts seeking concise information about CPT code 0546T, including how the technology is positioned within operative care and what aspects of payer policy and utilization are most relevant for national stakeholders.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare0546TCPTbreast-surgeryintraoperative-imagingradiofrequency-spectroscopymargin-assessmentsurgical-oncology

Billing Code Overview

CPT code 0546T describes the use of radiofrequency spectroscopy imaging performed immediately after a partial mastectomy or lumpectomy to assess surgical margins for residual cancer. The procedure uses electromagnetic-wave–based spectroscopy to evaluate the excised specimen or the surgical cavity to determine whether margins are free of tumor cells.

Service Type: Intraoperative margin assessment / surgical adjunct imaging

Typical Site of Service: Hospital operating room or ambulatory surgical center

Clinical & Coding Specifications

Clinical Context

A 52-year-old woman undergoes a breast-conserving surgery (partial mastectomy/lumpectomy) for a biopsy-proven early-stage invasive ductal carcinoma. Intraoperative frozen section or permanent pathology is not yet definitive for margin status, so the surgical team employs radiofrequency spectroscopy immediately after the excision to assess the surgical margins for residual tumor at the cavity edge. The procedure is performed in an operating room or ambulatory surgical center under general or regional anesthesia as part of the index surgical encounter. The device provides real-time information to guide the surgeon in obtaining additional tissue from areas with a positive or close signal, with the goal of achieving negative margins and reducing the need for re-excision. Typical workflow: preoperative imaging and biopsy, operative lumpectomy/partial mastectomy, intraoperative radiofrequency spectroscopy evaluation of margins (0546T), targeted additional excision if spectroscopy indicates positive or close margins, and specimen submission for permanent pathology confirmation.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	When the radiofrequency spectroscopy is unusually complex or requires substantially greater effort than typical.

23

Taxonomy Code	Specialty	Notes
`207Q00000X`	General Surgery	General surgeons commonly perform breast-conserving surgery and intraoperative margin assessment.
`207VG0400X`	Breast Surgery (Surgical Oncology)	Surgical oncologists specializing in breast surgery perform lumpectomy and intraoperative margin technologies.
`207L00000X`	Surgical Oncology	Oncology surgeons using advanced intraoperative margin assessment techniques.
`207K00000X`	Thoracic Surgery	Some thoracic/breast surgeons in multi-disciplinary centers may perform breast-conserving procedures.
`207P00000X`	Plastic and Reconstructive Surgery	Plastic surgeons may participate when oncoplastic techniques and immediate reconstruction influence margin management.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C50.911`	Malignant neoplasm of unspecified site of right female breast	Represents invasive breast cancer in the right breast prompting lumpectomy and intraoperative margin assessment.
`C50.912`	Malignant neoplasm of unspecified site of left female breast	Represents invasive breast cancer in the left breast prompting lumpectomy and intraoperative margin assessment.
`D05.10`	Lobular carcinoma in situ of breast, unspecified breast	High-risk and in-situ lesions for which breast-conserving surgery and margin evaluation may be indicated.
`D05.90`	Unspecified ductal carcinoma in situ of breast	DCIS often requires careful intraoperative margin assessment to reduce re-excision rates.
`N63`	Unspecified lump in breast	A clinical finding that may lead to excision and intraoperative margin evaluation if cancer is suspected.
`R92.8`	Other abnormal and inconclusive findings on diagnostic imaging of breast	Imaging abnormalities leading to biopsy and surgical excision with intraoperative margin assessment.
`Z90.13`	Acquired absence of right breast and nipple	Postoperative or recurrent scenarios where margin assessment may be relevant during re-excision procedures.
`Z90.11`	Acquired absence of left breast and nipple	Similar relevance for contralateral or reconstructive procedures with margin considerations.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`19301`	Partial mastectomy, with or without axillary surgery	Primary surgical procedure (lumpectomy/partial mastectomy) during which intraoperative margin assessment `0546T` is performed.
`19120`	Excision of breast lesion; open, male or female, single lesion	Small open excisions where intraoperative margin evaluation may be applied.
`88305`	Level IV pathology, surgical pathology, gross and microscopic examination	Permanent pathology examination of the excised specimen and margins that confirms findings after intraoperative spectroscopy.
`88342`	Immunohistochemistry (per specimen)	Used when immunostains are required to characterize tumor at margins or in specimens flagged by intraoperative assessment.
`19302`	Partial mastectomy with axillary lymph node dissection	When axillary dissection is performed in conjunction with lumpectomy and intraoperative margin assessment.
`76942`	Ultrasonic guidance for needle placement (e.g., imaging guidance for localization)	Preoperative or intraoperative localization procedures that may be used in conjunction with lumpectomy and margin assessment.