Summary & Overview
CPT 83065: Thermolabile Hemoglobin Measurement
CPT code 83065 represents a laboratory assay for thermolabile (unstable) hemoglobin, most often used when hemolytic anemia or unstable hemoglobinopathies are suspected. This code designates a diagnostic laboratory procedure performed on whole blood to detect hemoglobin that denatures at elevated temperatures, which has clinical implications for diagnosis and management of hemolysis and related disorders. Nationally, accurate coding of specialized hemoglobin testing supports appropriate clinical follow-up and laboratory reimbursement for complex assays.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical purpose of the test, typical sites of service, common billing modifiers, and expected places where the service is performed. The publication summarizes benchmarks and payer coverage considerations, clarifies coding context for laboratory services, and outlines clinical scenarios that commonly prompt this assay. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 83065 describes a laboratory measurement of thermolabile hemoglobin, typically performed on a whole blood specimen. This test identifies and quantifies unstable hemoglobin variants that are prone to denaturation and are often associated with hemolytic anemia.
Service Type: Laboratory diagnostic test
Typical Site of Service: Clinical laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A 42-year-old adult presents to the outpatient hematology clinic with fatigue, jaundice, and intermittent dark urine. The treating hematologist suspects a hemolytic anemia of unclear etiology and orders laboratory evaluation including a thermolabile hemoglobin assay. A phlebotomy technician collects a whole blood specimen following standard venipuncture procedures and promptly delivers the sample to the clinical laboratory to minimize degradation of unstable hemoglobin variants. In the lab, a medical technologist or laboratory analyst performs 83065 to measure the thermolabile hemoglobin fraction, documents the result in the laboratory information system, and communicates abnormal findings to the ordering hematologist for correlation with peripheral smear, reticulocyte count, direct antiglobulin test, and additional hemoglobin studies. Typical sites of service include hospital outpatient laboratories, independent clinical laboratories, and hospital inpatient laboratories when performed during an admission for anemia evaluation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the professional interpretation component if applicable (rare for this lab test). |
TC |