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CPT 78808: Intravenous Radiotracer Injection for Gamma-Probe Localization

CPT code 78808 represents an intravenous injection of a gamma-emitting radioactive tracer for intraoperative or preoperative localization of a targeted structure using a handheld gamma probe. This nuclear medicine procedure is used to identify lesions or sentinel nodes that concentrate radiotracer, supporting surgical localization and targeted intervention. Nationally, CPT code 78808 matters for hospitals, imaging centers, and surgical practices that perform sentinel node mapping or other radioguided localization procedures because it captures a specialized diagnostic/ localization service integral to certain oncologic and surgical workflows.

Key payers addressed in standard coverage discussions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise briefing on the clinical role of the procedure, typical sites of service, common billing considerations, and which payers commonly cover this service. The publication outlines benchmarks and policy-relevant issues that affect coverage and utilization, plus clinical context explaining when radiotracer-guided localization is applied. Data not available in the input will be noted where applicable.

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Billing Code Overview

CPT code 78808 describes an intravenous injection of a gamma-emitting radioactive tracer used to localize a structure with a handheld gamma probe. The procedure involves administering the tracer intravenously and then using the probe to detect tracer radioactivity to guide localization.

Service type: Image-guided localization using radiotracer injection
Typical site of service: Hospital outpatient department, outpatient imaging center, or specialized nuclear medicine clinic

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CPT 78808: Intravenous Radiotracer Injection for Gamma-Probe Localization

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Billing Code Overview

Service type: Image-guided localization using radiotracer injection
Typical site of service: Hospital outpatient department, outpatient imaging center, or specialized nuclear medicine clinic

Clinical & Coding Specifications

Clinical Context

A typical patient is a 55-year-old woman with early-stage breast cancer scheduled for lumpectomy with sentinel lymph node mapping. On the morning of surgery, the nuclear medicine team injects a gamma–emitting radiotracer intravenously, and the surgeon uses a handheld gamma probe intraoperatively to localize sentinel lymph nodes for removal. The clinical workflow begins with preoperative planning and informed consent, radiotracer preparation and administration by nuclear medicine or radiology staff, and timing coordinated so tracer uptake is optimal at the time of surgery. In the operating room, the surgeon uses the gamma probe to identify radioactive hotspots corresponding to sentinel nodes; the nodes are excised and sent to pathology. Post-procedure documentation includes the injected radiotracer, dose, injection site, time of injection, probe findings, nodes removed, and any immediate complications. Typical sites of service are hospital operating rooms and ambulatory surgery centers.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the physician’s interpretation or intraoperative localization service separate from technical services
`50`	Bilateral procedure	Use when the procedure is performed on both sides during the same operative session
`52`	Reduced services	Use when the procedure is partially reduced or not completed as originally intended
`53`	Discontinued procedure	Use when the procedure is started but discontinued due to extenuating circumstances
`54`	Surgical care only	Use when another provider bills pre- and post-operative care, and this provider bills only intraoperative localization
`55`	Postoperative management only	Use when the provider bills only postoperative care related to the procedure
`59`	Distinct procedural service	Use to indicate a separate and distinct procedure when multiple procedures may be bundled
`62`	Two surgeons	Use when two surgeons of different specialties work together as primary surgeons
`78`	Return to OR for a related procedure during the postoperative period	Use when a return to the OR is required for a related procedure
`80`	Assistant at surgery	Use when a surgical assistant provides services during the procedure
`82`	Assistant with qualified resident surgeon	Use when an assistant is required because a qualified resident is unavailable
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an advanced practice clinician serves as assistant at surgery
`TC`	Technical component	Use when billing only the technical component (equipment, supplies, tracer administration) separate from professional component

Taxonomy Code	Specialty	Notes
2084P0800X	General Surgery	Surgeons who perform sentinel node localization and excision
2085R0201X	Surgical Oncology	Surgical oncologists commonly perform oncologic localization and node removal
2086S0110X	Breast Surgery	Breast surgeons performing lumpectomy and sentinel node mapping
261QM0800X	Nuclear Medicine Physician	Physicians who oversee radiotracer preparation and injection
207R00000X	Radiology	Interventional or diagnostic radiologists involved in tracer administration

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C50.911`	Malignant neoplasm of unspecified site of right female breast	Primary breast cancer diagnosis commonly requiring sentinel lymph node localization
`C50.912`	Malignant neoplasm of unspecified site of left female breast	Left-sided breast cancer indicating need for localization and node mapping
`C79.81`	Secondary malignant neoplasm of breast	Metastatic disease to the breast that may require surgical staging and localization
`D05.10`	Lobular carcinoma in situ of breast, unspecified breast	High-risk or in-situ lesions where sentinel node evaluation may be considered in surgical planning
`R59.0`	Localized enlarged lymph nodes	Clinical finding prompting lymph node localization and biopsy
`Z90.11`	Acquired absence of right breast and nipple	Post-mastectomy patient scenarios where nodal mapping or localization may be altered

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`78808`	Radiopharmaceutical localization of a structure using a gamma probe (intravenous tracer)	Primary procedure describing IV injection of gamma–emitting tracer and intraoperative localization with a handheld gamma probe
`38525`	Biopsy or excision of lymph node(s); open, deep axillary node(s)	Often performed when sentinel lymph nodes localized with the gamma probe are surgically excised
`38900`	Intraoperative identification (e.g., intraoperative lymphatic mapping)	Related intraoperative mapping procedures; may be reported when additional mapping techniques are used
`78800`	Radiopharmaceutical localization of a lesion or tumor, single day imaging (planar)	Preoperative localization imaging that may be performed by nuclear medicine to complement intraoperative probe localization
`77370`	Special medical radiation physics consultation, implementation, and quality assurance	May be performed when specialized radiotracer handling, dose calibration, or equipment QA is required

CPT 78800: Planar Nuclear Medicine for Single–Area Tumor/Inflammation Localization

CPT-78801-MULTI-DAY-MULTI-AREA-NUCLEAR-MEDICINE-IMAGING

CPT 78801: Multi-Day/Multi-Area Nuclear Medicine Imaging

CPT-78802-WHOLE-BODY-NUCLEAR-MEDICINE-IMAGING

CPT 78802: Whole-Body Nuclear Medicine Imaging with Radiotracer

CPT-78803-SPECT-SINGLE-AREA-LOCALIZATION

CPT 78803: Single-Area SPECT for Tumor or Inflammatory Localization

CPT-78804-MULTIDAY-WHOLE-BODY-NUCLEAR-IMAGING-GAMMA-TRACER

CPT 78804: Multiday Whole-Body Nuclear Imaging with Gamma Tracer

CPT-78811-TARGETED-PET-LOCALIZED-BODY-REGION

CPT 78811: Targeted PET Scan of a Localized Body Region

CPT-78812-FDG-PET-BODY-IMAGING-FOR-ONCOLOGIC-EVALUATION

CPT 78812: FDG PET Body Imaging for Oncologic Evaluation

CPT-78813-WHOLE-BODY-PET

CPT 78813: Whole-Body Positron Emission Tomography (PET)

CPT-78814-PET-CT-TUMOR-LOCALIZATION-METABOLIC-EVALUATION

CPT 78814: PET/CT Fusion for Tumor Localization and Metabolic Evaluation

CPT-78815-PET-CT-TUMOR-IMAGING-ANATOMICAL-LOCALIZATION

CPT 78815: PET/CT Tumor Imaging for Anatomical Localization

Showing 1–10 of 16

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
`26`	Professional component	Use when billing only the physician’s interpretation or intraoperative localization service separate from technical services
`50`	Bilateral procedure	Use when the procedure is performed on both sides during the same operative session
`52`	Reduced services	Use when the procedure is partially reduced or not completed as originally intended
`53`	Discontinued procedure	Use when the procedure is started but discontinued due to extenuating circumstances
`54`	Surgical care only	Use when another provider bills pre- and post-operative care, and this provider bills only intraoperative localization
`55`	Postoperative management only	Use when the provider bills only postoperative care related to the procedure
`59`	Distinct procedural service	Use to indicate a separate and distinct procedure when multiple procedures may be bundled
`62`	Two surgeons	Use when two surgeons of different specialties work together as primary surgeons
`78`	Return to OR for a related procedure during the postoperative period	Use when a return to the OR is required for a related procedure
`80`	Assistant at surgery	Use when a surgical assistant provides services during the procedure
`82`	Assistant with qualified resident surgeon	Use when an assistant is required because a qualified resident is unavailable
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an advanced practice clinician serves as assistant at surgery
`TC`	Technical component	Use when billing only the technical component (equipment, supplies, tracer administration) separate from professional component

Taxonomy Code	Specialty	Notes
2084P0800X	General Surgery	Surgeons who perform sentinel node localization and excision
2085R0201X	Surgical Oncology	Surgical oncologists commonly perform oncologic localization and node removal
2086S0110X	Breast Surgery	Breast surgeons performing lumpectomy and sentinel node mapping
261QM0800X	Nuclear Medicine Physician	Physicians who oversee radiotracer preparation and injection
207R00000X	Radiology	Interventional or diagnostic radiologists involved in tracer administration

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C50.911`	Malignant neoplasm of unspecified site of right female breast	Primary breast cancer diagnosis commonly requiring sentinel lymph node localization
`C50.912`	Malignant neoplasm of unspecified site of left female breast	Left-sided breast cancer indicating need for localization and node mapping
`C79.81`	Secondary malignant neoplasm of breast	Metastatic disease to the breast that may require surgical staging and localization
`D05.10`	Lobular carcinoma in situ of breast, unspecified breast	High-risk or in-situ lesions where sentinel node evaluation may be considered in surgical planning
`R59.0`	Localized enlarged lymph nodes	Clinical finding prompting lymph node localization and biopsy
`Z90.11`	Acquired absence of right breast and nipple	Post-mastectomy patient scenarios where nodal mapping or localization may be altered

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`78808`	Radiopharmaceutical localization of a structure using a gamma probe (intravenous tracer)	Primary procedure describing IV injection of gamma–emitting tracer and intraoperative localization with a handheld gamma probe
`38525`	Biopsy or excision of lymph node(s); open, deep axillary node(s)	Often performed when sentinel lymph nodes localized with the gamma probe are surgically excised
`38900`	Intraoperative identification (e.g., intraoperative lymphatic mapping)	Related intraoperative mapping procedures; may be reported when additional mapping techniques are used
`78800`	Radiopharmaceutical localization of a lesion or tumor, single day imaging (planar)	Preoperative localization imaging that may be performed by nuclear medicine to complement intraoperative probe localization
`77370`	Special medical radiation physics consultation, implementation, and quality assurance	May be performed when specialized radiotracer handling, dose calibration, or equipment QA is required

CPT 78800: Planar Nuclear Medicine for Single–Area Tumor/Inflammation Localization

CPT-78801-MULTI-DAY-MULTI-AREA-NUCLEAR-MEDICINE-IMAGING

CPT 78801: Multi-Day/Multi-Area Nuclear Medicine Imaging

CPT-78802-WHOLE-BODY-NUCLEAR-MEDICINE-IMAGING

CPT 78802: Whole-Body Nuclear Medicine Imaging with Radiotracer

CPT-78803-SPECT-SINGLE-AREA-LOCALIZATION

CPT 78803: Single-Area SPECT for Tumor or Inflammatory Localization

CPT-78804-MULTIDAY-WHOLE-BODY-NUCLEAR-IMAGING-GAMMA-TRACER

CPT 78804: Multiday Whole-Body Nuclear Imaging with Gamma Tracer

CPT-78811-TARGETED-PET-LOCALIZED-BODY-REGION

CPT 78811: Targeted PET Scan of a Localized Body Region

CPT-78812-FDG-PET-BODY-IMAGING-FOR-ONCOLOGIC-EVALUATION

CPT 78812: FDG PET Body Imaging for Oncologic Evaluation

CPT-78813-WHOLE-BODY-PET

CPT 78813: Whole-Body Positron Emission Tomography (PET)

CPT-78814-PET-CT-TUMOR-LOCALIZATION-METABOLIC-EVALUATION

CPT 78814: PET/CT Fusion for Tumor Localization and Metabolic Evaluation

CPT-78815-PET-CT-TUMOR-IMAGING-ANATOMICAL-LOCALIZATION

CPT 78815: PET/CT Tumor Imaging for Anatomical Localization

Showing 1–10 of 16

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 78808: Intravenous Radiotracer Injection for Gamma-Probe Localization

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Billing Code Overview

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OpenPayer

CPT 78808: Intravenous Radiotracer Injection for Gamma-Probe Localization

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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