HCPCS Level II code A4648 denotes an implantable tissue marker supplied and billed per unit: “Tissue marker, implantable, any type, each.” These devices are used to mark lesions or surgical sites to aid in localization, image-guidance, and follow-up. Nationwide, tissue markers support diagnostic and therapeutic procedures across oncology, breast surgery, interventional radiology, and other specialties, making accurate coding important for clinical documentation and reimbursement consistency.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical uses and typical sites of service, plus benchmarking and payer-coverage summaries where available. The report highlights coding context, common modifiers and billing considerations, and any notable policy updates affecting supply billing for implantable markers.

This publication is intended to help billing managers, coders, and clinicians understand the clinical role of the device represented by A4648, common billing scenarios, and where to look for payer-specific coverage rules and documentation requirements. Data not provided in the input (such as specific payer fee schedules or ICD-10 linkage) is noted where applicable.