Summary & Overview
CPT 88341: Additional Single Antibody Stain Procedure in Pathology
CPT code 88341 represents each additional single antibody stain procedure performed on a specimen during immunohistochemistry or immunocytochemistry testing. This code is critical in pathology and laboratory medicine, supporting the detailed analysis of tissue samples for diagnostic and prognostic purposes. The procedure is typically performed in laboratory settings and is essential for identifying specific cellular markers, which play a pivotal role in the diagnosis and management of conditions such as cancer.
Major national payers, including Aetna, Blue Cross Blue Shield, Cigna Health, Medicare, and UnitedHealthcare, provide coverage for this service, reflecting its widespread clinical importance. Readers will gain insight into the clinical context of 88341, its relationship to primary and related pathology codes, and the policy landscape surrounding its use. The publication covers benchmarks, policy updates, and relevant modifiers, offering a comprehensive overview for stakeholders in laboratory medicine and pathology billing. Understanding the nuances of 88341 is vital for accurate reporting and reimbursement, as well as for maintaining compliance with payer requirements and clinical best practices.
CPT Code Overview
CPT code 88341 is used to report each additional single antibody stain procedure performed on a specimen as part of immunohistochemistry or immunocytochemistry testing. This code is listed separately in addition to the primary procedure and is commonly utilized in pathology and laboratory settings to provide detailed analysis of tissue samples. The typical site of service for this procedure is a laboratory, specifically Place of Service 81. Immunohistochemistry and immunocytochemistry are essential techniques in modern pathology, enabling precise identification of cellular markers and aiding in the diagnosis and classification of various diseases, including cancers.
Clinical & Coding Specifications
Clinical Context
A patient presents with a suspicious lesion, such as a mass in the breast, lung, prostate, colon, or bone/soft tissue. A biopsy specimen is obtained and sent to the laboratory for evaluation. The pathologist performs immunohistochemistry or immunocytochemistry to identify specific antigens within the tissue, aiding in diagnosis and classification of the neoplasm. The primary antibody stain is performed first (coded with 88342), and additional single antibody stains are performed as needed to further characterize the tumor, each billed with 88341. This process is essential for determining tumor origin, subtype, and guiding treatment decisions.
Coding Specifications
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Modifier
26: Used to indicate the professional component, when only the pathologist's interpretation and report are provided (not the technical laboratory work). -
Modifier
59: Used to indicate a distinct procedural service, when multiple stains are performed that are separate and not overlapping.
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