Summary & Overview
CPT 82800: Measurement of Blood pH, Arterial Blood Gas
CPT code 82800 denotes the laboratory measurement of blood pH, commonly obtained from an arterial blood gas (ABG). Blood pH is a core physiological parameter used to assess acid–base balance and guide acute care decisions in settings such as emergency departments, intensive care units, and inpatient wards. Nationally, standardized reporting of pH measurement supports clinical decision-making for respiratory and metabolic disorders and underpins billing/coverage workflows for laboratory services.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage and billing practices across these payers influence how facilities code and submit claims for ABG-related laboratory testing and how technical and professional components are handled.
Readers will find a concise overview of the clinical context for the test, typical sites of service, and payer coverage considerations. The publication also outlines common modifiers associated with laboratory services (listed in the metadata), expected settings where the test is performed, and where to find related coding guidance. Data not supplied in the input (such as associated taxonomies, ICD-10 mappings, and payer-specific reimbursement rates) is identified as not available.
Billing Code Overview
CPT code 82800 describes the laboratory measurement of blood pH, typically performed as part of an arterial blood gas (ABG) analysis. The service involves a laboratory analyst running an arterial blood specimen on a blood gas analyzer to determine the acid–base balance of the blood, a parameter that varies with respiratory, metabolic, and systemic clinical conditions.
Service type: Laboratory test — blood gas analysis (pH measurement)
Typical site of service: Hospital inpatient and emergency departments, intensive care units, and hospital or reference laboratories
Clinical & Coding Specifications
Clinical Context
A 62-year-old male with chronic obstructive pulmonary disease (COPD) and acute shortness of breath is brought to the emergency department. The treating clinician orders arterial blood gas analysis to assess oxygenation, ventilation, and acid–base status. An arterial sample (commonly radial artery) is obtained by a nurse or respiratory therapist and sent to the clinical laboratory. The lab analyst performs measurement of blood pH using an arterial blood gas (ABG) analyzer and documents results in the laboratory information system. Results are used by the treating team to guide oxygen therapy, ventilator settings, and acid-base management. Typical site of service: hospital inpatient or emergency department; occasionally performed in outpatient clinics, ambulatory surgery centers, or intensive care units when clinically indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the professional interpretation component (rare for ABG pH alone) |
52 | Reduced services | When specimen quality or volume limits full testing and a reduced service is performed |
53 | Discontinued procedure | If arterial collection attempted but procedure discontinued for patient safety |
59 | Distinct procedural service | When ABG pH is performed separately from other unrelated procedures on the same day |
62 | Two surgeons | When two providers of different specialties jointly perform the arterial puncture and stabilization (uncommon) |
76 | Repeat procedure by same physician | When a repeat arterial blood gas pH measurement is performed by the same provider (Note: 76 not listed in provided modifiers; excluded) |
90 | Reference (outside) laboratory | When the specimen is sent to an outside reference laboratory for pH measurement |
91 | Repeat clinical diagnostic laboratory test | When a second arterial blood gas pH measurement is performed on a subsequent specimen to verify results |
91 is included above; duplicates avoided for clarity |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207RP1000X | Pulmonary Disease | Pulmonologists frequently order and interpret ABG results for respiratory failure and ventilator management |
| 363LP0800X | Clinical Laboratory | Clinical laboratory technologists/medical laboratory scientists perform the pH measurement and reporting |
| 207L00000X | Critical Care Medicine | Intensivists commonly manage patients needing serial ABGs in the ICU |
| 207Q00000X | Emergency Medicine | Emergency physicians order ABGs in acute respiratory or metabolic emergencies |
| 261QM0800X | Respiratory Therapy | Respiratory therapists commonly obtain arterial samples and perform point-of-care ABG testing |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
| Data not available in the input. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
82803 | Blood gas analysis; measurement of oxygen and carbon dioxide partial pressures (pO2 and pCO2) | Often performed alongside pH measurement on the same ABG sample to assess gas exchange and ventilation |
82805 | Blood gas analysis; multiple electrode (pH, pCO2, pO2, electrolytes) | Comprehensive ABG panels that include pH as one component; commonly ordered together |
36415 | Collection of venous blood by venipuncture | Venous collection codes may be billed for other laboratory tests obtained in the same encounter; arterial puncture itself is not separately coded here |
94640 | Pressurized or non-pressurized inhalation treatment for acute airway obstruction; nebulizer therapy | Clinical treatments often adjusted based on ABG pH results in respiratory distress |
94002 | Ventilation assist and management initiation | ABG pH informs decision to initiate or adjust mechanical ventilation; code reflects related ventilator management activities |