Summary & Overview
CPT 83883: Nephelometry Quantitative Measurement of Analyte
CPT code 83883 represents a laboratory quantitative test that measures the concentration of an analyte not elsewhere specified using nephelometry. As a laboratory procedure, it is used in diagnostic workflows where nephelometric measurement of proteins or other analytes is required. Nationwide, this code matters for clinical laboratories, hospital labs, and payers that manage laboratory benefit coverage and reimbursement for specialized analytic methods.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise national overview of the code’s clinical role, typical sites of service, and payer coverage landscape. The publication presents benchmarks and utilization context relevant to laboratory service lines, explains how nephelometric assays are classified for billing purposes, and summarizes common billing modifiers associated with laboratory services. Where available, the piece highlights policy updates and coverage considerations that affect reimbursement and claim adjudication for nephelometry-based quantitative assays.
Data not available in the input: specific associated taxonomies, ICD-10 diagnoses, and related CPT or ancillary codes.
Billing Code Overview
CPT code 83883 describes a laboratory procedure in which a lab analyst measures the amount of an analyte not elsewhere specified using nephelometry on a patient specimen. This service is a quantitative immunologic or protein assay performed by clinical laboratory personnel.
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Service type: Laboratory quantitative analysis via nephelometry
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Typical site of service: Clinical laboratory or hospital laboratory setting
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A 58-year-old outpatient with a history of chronic inflammatory disease undergoes laboratory evaluation for serum protein markers. The clinician orders a nephelometric assay to quantify an analyte (for example, immunoglobulins, complement components, or other proteins) not otherwise specified by standard automated panels. A phlebotomy technician collects a serum sample at an ambulatory laboratory or hospital outpatient phlebotomy station. The specimen is transported to the clinical laboratory where a medical laboratory scientist or technologist prepares and runs a nephelometry-based immunoassay. The laboratory analyst performs 83883 to measure the analyte concentration by light-scattering detection. Results are reviewed by the laboratory director and reported to the ordering provider for correlation with the patient’s clinical status. Typical sites of service include hospital clinical laboratories, independent reference laboratories, and hospital outpatient departments.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the professional interpretation component separate from the technical component. |
TC |