Colorado Rocky Mountain Health Plans ambulance Coverage Update

Coverage and Medical Necessity Criteria

Emergency Air Ambulance - Medical Necessity

Emergency Air Ambulance services are considered Medically Necessary when ALL of the following are met

Air Ambulance medical necessity: Member's medical condition requires immediate transportation that cannot be provided by ground ambulance and a delay in transportation time may endanger the member's life or seriously endanger the member's health

Examples: ground transport times excessive (30-60 minutes or longer); or weather/traffic make ground impractical; or pickup point inaccessible by ground

Destination requirement: The member's destination is the nearest acute care hospital that can meet the member's needs

Request or level of care: Either services are requested by police or medical authorities at the site of an Emergency OR advanced or basic life support is required during transportation

Emergency Ground Ambulance - Medical Necessity

Emergency ground ambulance services are considered Medically Necessary when ALL of the following are met

Immediate transport need: Member's medical condition requires immediate transportation to the nearest acute hospital that can provide services appropriate to the covered person's illness or injury

Includes neonatal transfers to the nearest neonatal special care unit and transfers to a higher level of care not available at the original hospital

Delay risk: A delay in transportation time may endanger the member's life or seriously endanger the member's health

Care during transport: Advanced or basic life support is required during transportation

Emergency ground ambulance without transport is considered medically necessary when treatment is rendered at the scene

Non-Emergency Ambulance - Coverage

Non-Emergency Ambulance (Ground and Air) coverage includes transport between facilities when ANY one of the following is met

Inter-facility transfer reasons: From an out-of-network hospital to the closest network hospital when Covered Health Care Services are required; OR to the closest network hospital that provides the required Covered Health Care Services not available at the original hospital; OR from a Short-Term Acute Care Facility to the closest network LTAC, network inpatient rehabilitation facility, or other network Sub-Acute Facility where the required Covered Health Care Services can be delivered

Covered ambulance transport

Covered when ALL of the following are met

General coverage: Transport is by a licensed ambulance (ground, air, or water) and is the only safe way to transport the member to the nearest hospital or other care facility due to the nature or severity of the injury or illness.

Mode of transport is determined by appropriate authorities (e.g., first responders, emergency room physician).

Non‑Emergency interfacility coverage: Interfacility non‑emergency ambulance (ground or air) is covered when transport is from an out‑of‑network hospital to the closest network hospital when covered services are required; to the closest network hospital that provides required covered services not available at the original hospital; or from a Short‑Term Acute Care Facility to the closest network LTAC, inpatient rehabilitation facility, or other network Sub‑Acute Facility where required covered services can be delivered.

Applicable benefit level depends on the member's pick‑up location (origin) and inpatient vs sub‑acute settings.

Appropriate Use Criteria for Air Medical Transport

Air medical transport is appropriate when ONE OR MORE of the following primary goals are met:

Primary goals for air transport: Initiation or continuation of advanced or specialty care not otherwise available locally; OR expedited delivery for time‑sensitive intervention; OR extraction/evacuation/rescue from environments difficult to access (geography, weather, remote location, distance, or other factors limiting timely access)

Per joint NAEMSP/ACEP/AMPA position statement

Preference for ground EMS: Ground EMS is preferred if it can meet the patient's clinical need for critical care expertise and timely transport to definitive care

GEMS clinicians should be empowered to cancel air response if continued response would place air or ground crews at undue risk or does not align with primary goals

STEMI and Acute Stroke: Air transport is supported for STEMI patients from scene to PCI‑capable hospitals and for acute stroke requiring urgent/time‑sensitive diagnosis or intervention, with medical necessity determined by trained personnel under regional policy

AMPA supports certification of necessity by requesting provider or receiving physician/transport medical director on scene transports

Equipment Standards and Quality Assurance

EMS agencies should follow equipment and maintenance standards:

Equipment and QA standards: Providers must be credentialed with demonstrated knowledge and skills; follow clinical protocols supported by evidence; carry equipment and supplies necessary to deliver appropriate care across all ages; perform preventive maintenance and routine function checks; and promptly address malfunctioning or missing equipment to preserve readiness to respond.

Includes recommended required equipment lists for BLS and ALS ground ambulances, optional equipment based on local needs, and optional medications; routine quality assurance to confirm equipment readiness.

Emergency air ambulance services are considered medically necessary only when the policy’s specified air-transport criteria are met. If the member’s condition does not meet those criteria (for example, when the situation does not require immediate transportation that cannot be provided by ground, the destination is not the nearest appropriate acute-care hospital, or neither police/medical authorities requested the service nor ALS/BLS is required during transport), the service is not covered. The policy explicitly states: Emergency Air Ambulance services are not considered Medically Necessary for all other indications.

Common exclusions include services provided by unlicensed or improperly licensed providers, any air ambulance transports that do not meet the policy’s covered air-transport indications, and non‑ambulance transportation modes (examples given: commercial or private airline or helicopter, police car, medi‑van/wheelchair van, taxi, bus, rideshare services such as Lyft and Uber). Additional exclusions include ambulance transport when another mode of transport would not endanger the member’s health, transports to home/residential/custodial facilities, transports for member convenience or non-clinical reasons, and transports that violate the policy’s notification criteria or other coverage limits.

FDA regulation is not relevant to coverage determinations for ambulance transport. The policy notes that ambulance transportation is a service and, therefore, not subject to regulation by the FDA, and that FDA approval alone is not a basis for coverage. This section is informational only and does not change the medical‑necessity criteria.

Transports that fail to meet the emergency criteria in this policy are considered not medically necessary. Examples include situations where the member does not require immediate transport to the nearest acute-care facility, where a delay would not be expected to endanger life or health, or where ALS/BLS are not required during transport. The policy states that Emergency ground and air ambulance transportation is not considered Medically Necessary for all other indications beyond the listed emergency criteria.

Ambulance transport is not required when other safe modes of transportation are available. The policy excludes transports when ‘‘ambulance transportation when other mode of transportation is appropriate’’ and specifies that ambulance services are not covered when transportation by other means would not endanger the member’s health. Routine trips (e.g., hospital-to-home, home-to-physician office, scheduled services) and non‑urgent travel where the member is medically able to use another mode of transport are listed as examples.

Coding and Billing Codes

Air Ambulance CPT/HCPCSmixed

A0430	Ambulance service, conventional air services, transport, one way (fixed wing)
A0431	Ambulance service, conventional air services, transport, one way (rotary wing)
A0435	Fixed wing air mileage, per statute mile
A0436	Rotary wing air mileage, per statute mile
S9960	Ambulance service, conventional air services, nonemergency transport, one way (fixed wing)
S9961	Ambulance service, conventional air service, nonemergency transport, one way (rotary wing)
T2007	Transportation waiting time, air ambulance and nonemergency vehicle, one-half (1/2) hour increments

Air Ambulance Revenue CodesRevenue

0545	Ambulance-Air Ambulance
0540	Ambulance-General Classification
0541	Ambulance-Supplies
0542	Ambulance-Medical Transport
0543	Ambulance-Heart Mobile
0544	Ambulance-Oxygen
0546	Ambulance-Neonatal Ambulance Services
0547	Ambulance-Pharmacy
0548	Ambulance-EKG Transmission
0549	Ambulance-Other Ambulance

Ambulance Revenue Codes ExamplesRevenue

0540	Ambulance-General Classification
0541	Ambulance-Supplies
0542	Ambulance-Medical Transport
0543	Ambulance-Heart Mobile
0544	Ambulance-Oxygen
0545	Ambulance-Air Ambulance
0546	Ambulance-Neonatal Ambulance Services
0547	Ambulance-Pharmacy
0548	Ambulance-EKG Transmission
0549	Ambulance-Other Ambulance

Ambulance ModifiersModifier

D	Diagnostic or therapeutic site other than P or H when these are used as origin codes
E	Residential, domiciliary, custodial facility (other than 1819 facility)
G	Hospital-based ESRD facility
H	Hospital
I	Site of transfer (e.g., airport or helicopter pad) between modes of ambulance transport
J	Freestanding ESRD facility
N	Skilled nursing facility
P	Physician's office
QL	Patient pronounced dead after ambulance called; billed in place of origin/destination combination
R	Residence

1–10 of 13

1/2

Placeholder - No Explicit Codes Listedmixed

N/A	No additional codes listed in this section of the document

Ground transport time threshold

Ground transport excessive time threshold30-60 minutes

Air transport efficiency threshold

Air transport time efficiency thresholdAir transport may be faster than ground when distance > 40 miles (study cited)

Provider Responsibilities, Prior Authorization, and Denial Triggers

Prior Authorization

Prior Authorization and Coding for Non-Emergency Transports

Prior authorization is required for non-Emergency Air Ambulance transports. Certain plans may require prior authorization for non-Emergency ground ambulance transport; providers must verify the member-specific benefit plan document. When prior authorization is required, include origin and destination, clinical justification for the interfacility transfer, and relevant clinical records supporting the level of transport requested. Ambulance claims must be billed with appropriate ambulance modifiers indicating origin and destination as described in the Applicable Codes section.

Prior authorization required: non-Emergency Air Ambulance (all plans).
Check member-specific plan for non-Emergency ground ambulance PA requirements.
Include pickup origin, destination, clinical rationale, and supporting medical records with PA request.
Use correct ambulance modifiers for origin and destination on claims (see Applicable Codes).

Denial Risk

Definitions and Terms

Air Ambulance — rotary/fixed wing definition per 42 CFR reference and scope

Regulatory definitionAir Ambulance = medical transport by rotary wing (helicopter) or fixed wing aircraft certified as an ambulance per 42 CFR 414.605

Rotary wing (RW)Transportation by a helicopter that is certified as an ambulance, including medically necessary services and supplies during transport

Fixed wing (FW)Transportation by a fixed wing aircraft that is certified as a fixed wing Air Ambulance, including medically necessary services and supplies during transport

Medically Necessary — definition of medically necessary services

Core definitionMedically Necessary services are those that are in accordance with Generally Accepted Standards of Medical Practice and clinically appropriate in type, frequency, extent, service site and duration

Additional criteria

Background and Evidence

Emergency ambulance (ground or air) is intended to provide immediate transport when the member’s condition cannot safely be managed by ground transport and a delay may endanger life or seriously jeopardize health. Air transport is specifically reserved for situations where ground transport is impractical or excessively delayed (for example, when ground times are excessive, access by ground is impossible, or weather/traffic preclude ground response). Non‑emergency ambulance coverage is limited to interfacility transfers that meet the policy’s transfer conditions. Overall, the policy’s scope defines when ambulance services are covered by plan benefits and clarifies documentation and authorization expectations for both emergency and non‑emergency transports.

The policy summarizes the clinical evidence base supporting selective use of air medical transport. Published retrospective studies and systematic reviews show mixed results: some single‑center and registry analyses report shorter in‑transit times or potential benefits for selected trauma, stroke, and time‑sensitive conditions, while other studies find no clear mortality or functional‑outcome advantage after adjustment for confounders. For example, Kunte et al. found air transfer was faster only when distances exceeded about 40 miles and that mode of transfer did not independently predict functional outcome after accounting for treatments; Rhodes et al. described worse outcomes associated with prolonged rendezvous delays and emphasized timely direct HEMS transfer in rural trauma systems; larger observational analyses and a Cochrane review note heterogeneity, selection bias, and limited high‑quality evidence. The policy uses this literature to support targeted, criteria‑based use of air transport rather than routine deployment.

Policy Revision History

2026-01-01policy_revisionLatest

Administrative template update and creation of a shared policy version to support application to Oxford plan membership; previous policy versions MP.001.23 and TRANSPORT 002.32 archived.

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Ambulance and Emergency Air Ambulance Services