Summary & Overview
CPT 82803: Arterial Blood Gas Analysis
CPT code 82803 denotes a blood gas analysis, most commonly an arterial blood gas (ABG), that measures at least two gas or acid–base parameters such as pH, pCO2, pO2, CO2, HCO3, and calculated O2 saturation. This laboratory service is critical for assessing respiratory function, oxygenation, and acid–base balance in acute and chronic care settings, influencing urgent clinical decisions in emergency, perioperative, and intensive care contexts.
Key payers covered in this review include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of reimbursement context and clinical application for CPT code 82803, plus practical benchmarks and payer coverage considerations relevant to hospitals, emergency departments, outpatient laboratories, and physician groups that order or perform ABG testing.
The publication provides: a clinical context for when and why the test is used; comparisons of common payer coverage approaches and billing practices; guidance on documentation elements that support medical necessity for acute and monitoring situations; and notes on typical sites of service. Data not provided in the input are explicitly identified as unavailable where applicable. The material is intended for health policy analysts, revenue cycle managers, clinicians, and laboratory directors seeking a national perspective on billing and clinical use of CPT code 82803.
Billing Code Overview
CPT code 82803 describes a blood gas analysis in which a laboratory analyst measures at least two blood gas parameters. The test typically involves an arterial blood gas (ABG) specimen run on a blood gas analyzer to assess respiratory and metabolic status by reporting values such as pH, pCO2, pO2, CO2, HCO3, and calculated O2 saturation.
Service Type: Laboratory diagnostic test — arterial blood gas analysis
Typical Site of Service: Hospital laboratory, hospital emergency department, outpatient laboratory, or other acute care settings where arterial blood sampling and point-of-care or central laboratory analysis are performed.
Clinical & Coding Specifications
Clinical Context
A 67-year-old male with chronic obstructive pulmonary disease (COPD) and new-onset shortness of breath is brought to the emergency department with hypoxemia and increasing work of breathing. The treating physician orders an arterial blood gas (ABG) to evaluate oxygenation, ventilation, and acid–base status. A respiratory therapist or trained phlebotomist performs arterial puncture (typically radial artery) and collects an arterial specimen. The specimen is promptly transported to the hospital laboratory or analyzed at the point-of-care using a blood gas analyzer. The lab analyst performs blood gas analysis measuring at least two parameters such as pH and pCO2, and often pO2, HCO3-, and calculated O2 saturation. Results are reported to the ordering clinician for immediate management decisions such as supplemental oxygen adjustments, noninvasive ventilation, intubation, or acid–base correction. Typical sites of service include the emergency department, inpatient wards (including ICU), and hospital-based outpatient procedural areas that perform ABGs.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation or professional portion of a lab test if facilities separate technical and professional components. |
TC |