Summary & Overview
CPT 82805: Blood Gas Analysis with Measured Oxygen Saturation
CPT code 82805 denotes a blood gas analysis performed on a blood gas analyzer that measures one or more blood gas parameters and must include direct measurement of oxygen saturation. This code is used across acute and ambulatory laboratory settings to document clinically important physiologic measurements that guide respiratory and metabolic management, making it a frequently used laboratory service in emergency care, inpatient monitoring, and critical care workflows. Key national payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 82805, the typical sites of service where it is performed, and the common modifier usage patterns. The publication summarizes benchmarking considerations for utilization and payment, outlines policy and coding clarifications that commonly affect coverage determinations, and provides practical guidance on documentation elements required for accurate coding. Data not provided in the input is noted explicitly where relevant. The content is intended for coding professionals, laboratory managers, and policy analysts seeking a national perspective on the use and administration of CPT code 82805.
Billing Code Overview
CPT code 82805 describes a laboratory measurement of blood gas parameters performed on a blood gas analyzer. The service includes measurement of any number of blood gas values and specifically requires direct measurement of oxygen saturation (O2 saturation) as part of the test.
Service type: Laboratory — Blood Gas Analysis
Typical site of service: Clinical laboratory or hospital laboratory setting, including inpatient hospital laboratories, emergency department laboratories, and outpatient or reference laboratory facilities where blood gas analyzers are available.
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with chronic obstructive pulmonary disease (COPD) presents to the emergency department with progressive shortness of breath, hypoxemia, and altered mental status. The clinician orders an arterial blood gas (ABG) to evaluate ventilation, oxygenation, and acid-base status. A respiratory therapist or phlebotomist obtains an arterial sample (radial artery) and sends it to the hospital laboratory. The laboratory analyst runs the specimen on a blood gas analyzer that measures pH, partial pressures of carbon dioxide (PaCO2) and oxygen (PaO2), bicarbonate (HCO3-), electrolytes if applicable, and includes direct measurement of oxygen saturation (SaO2) per the description of 82805. Results are used by clinicians to guide decisions about supplemental oxygen, noninvasive ventilation, intubation, ventilator settings, and acid-base management. Typical site of service is the hospital laboratory supporting the emergency department, intensive care unit, or inpatient wards. The service type is clinical laboratory testing (blood gas analysis) with direct O2 saturation measurement documented in the laboratory report.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the laboratory professional interpretation component is reported separately from the technical component |
52 | Reduced services | When the laboratory test was partially completed or limited in scope compared with full procedure |
53 | Discontinued procedure | If specimen collection or analysis was started but aborted for clinical reasons |
59 | Distinct procedural service | To indicate a separate, distinct laboratory procedure when multiple unrelated services on same day might be bundled |
62 | Two surgeons | Rare for lab CPTs but used when two clinicians share distinct responsibilities relevant to collection/processing in complex settings |
91 | Repeat clinical diagnostic laboratory test | When the same blood gas test is repeated on the same day for monitoring purposes |
90 | Reference (outside) laboratory | When testing was performed by an outside reference laboratory and billed accordingly |
TC | Technical component | When billing only the laboratory technical component (instrumentation, technician time) separate from professional component |
26 | Professional component | When only professional interpretation or supervision is billed (listed again to emphasize applicability to lab tests) |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207R00000X | Pulmonary Disease | Pulmonologists frequently order and interpret ABG results for respiratory failure and ventilation management |
| 207L00000X | Critical Care Medicine | Intensivists use blood gas analysis for ventilator management in ICU settings |
| 363A00000X | Anesthesiology | Anesthesiologists obtain and use blood gas data intraoperatively and in perioperative critical care |
| 207P00000X | Emergency Medicine | Emergency physicians order ABGs for acute respiratory distress and shock evaluation |
| 261QM0700X | Clinical Laboratory Science/Medical Technology | Laboratory directors and medical technologists perform and oversee blood gas analyses |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
J96.00 | Acute respiratory failure, unspecified whether with hypoxia or hypercapnia | Primary indication for arterial blood gas measurement to assess oxygenation and ventilation |
J44.1 | Chronic obstructive pulmonary disease with (acute) exacerbation | Exacerbations commonly prompt ABG testing for hypoxemia and hypercapnia assessment |
R09.02 | Hypoxemia | Directly assessed by PaO2 and measured O2 saturation reported with 82805 |
R09.02 | Respiratory failure, hypoxia | (Note: R09.02 covers hypoxemia; clinicians frequently pair this code when blood gas confirms low oxygenation) |
E87.6 | Hypokalemia | Electrolyte disturbances can accompany acid-base abnormalities; blood gas analyzers may report electrolytes alongside gas measurements |
N18.9 | Chronic kidney disease, unspecified | CKD patients may have acid-base disturbances monitored with blood gas testing |
I46.9 | Cardiac arrest, cause unspecified | Post-arrest patients require immediate blood gas and SaO2 measurement for resuscitation management |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
82803 | Blood gas; single parameter (e.g., PaCO2 or PaO2) | Performed when only one blood gas parameter is measured; 82805 includes multiple parameters plus direct O2 saturation measurement |
82810 | Blood gas analysis, venous or arterial, multiple parameters, without direct O2 saturation measurement | Often ordered alongside or as alternative when direct SaO2 measurement is not required; 82805 specifies direct O2 saturation measurement |
36415 | Collection of venous blood by venipuncture | Commonly performed for concurrent laboratory tests; specimen collection for blood gas typically requires arterial puncture but venous samples may be drawn for comparative labs |
36600 | Arterial puncture, therapeutic, diagnostic, or monitoring (for blood gas) | Procedure code for arterial blood draw used to obtain specimen for 82805 in some billing contexts |
93000 | Electrocardiogram, routine ECG with at least 12 leads; with interpretation and report | Often performed in parallel when evaluating cardiopulmonary causes of hypoxia; complements blood gas data |