Summary & Overview
HCPCS A0426: Ambulance Advanced Life Support Non-Emergency Transport
HCPCS Level II code A0426 denotes advanced life support, non-emergency ground ambulance transport (level 1). This designation applies when ALS-level interventions are provided during a non-emergent transfer, and it is widely used across emergency medical services and hospital transfer workflows. Nationally, accurate coding of ALS non-emergency transports affects facility and EMS billing, utilization monitoring, and payer adjudication for medically necessary transfers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find context on the clinical setting and service definition for A0426, common payer coverage considerations, and what elements typically establish ALS-level care during a non-emergency transport. The publication also highlights benchmarking topics and policy updates that commonly affect ambulance services reimbursement and documentation requirements.
The report is organized to help revenue cycle leaders, EMS billing managers, and policy analysts understand coding intent, payer scope, and the operational implications of billing HCPCS Level II code A0426 for non-emergency ALS transports.
Billing Code Overview
HCPCS Level II code A0426 describes an ambulance service: advanced life support, non-emergency transport, level 1 (ALS 1). This code captures transports in which advanced life support interventions are provided during a non-emergency transfer.
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Service type: Advanced life support, non-emergency transport
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Typical site of service: Ground ambulance transport between healthcare facilities or from a residence to a healthcare facility for non-emergent clinical needs
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Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult with a chronic cardiac condition requiring scheduled non-emergency interfacility transport to a tertiary hospital for cardiology evaluation and monitoring. Example: a 68-year-old male with ischemic cardiomyopathy and recent decompensated heart failure is medically stable for transport but requires advanced life support capability during transit due to risk of arrhythmia and need for continuous cardiac monitoring and intravenous infusions. The clinical workflow begins with a physician or case manager ordering non-emergency ambulance transport with ALS 1 level. The ambulance provider verifies medical necessity, confirms presence of ALS-trained personnel (paramedic), prepares cardiac monitor/defibrillator, oxygen, IV access supplies, and medications as indicated. On pickup, the paramedic documents baseline vitals, ongoing interventions (cardiac monitoring, IV fluid or medication administration), and any changes en route. On arrival, a transfer report is provided to receiving staff, and documentation supports the ALS level by recording advanced assessment, monitoring, and any ALS-level interventions performed during transport.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
AS | Non‑participating physician certification and notice of admission not required under Medicare | Use when transport involves a beneficiary with applicable certification status for outpatient services under Medicare rules |