UnitedHealthcare Ambulance Coverage Update

Medical Necessity Criteria for Ambulance Services

Emergency Air Ambulance - Medically Necessary

Emergency Air Ambulance services are considered Medically Necessary when ALL of the following criteria are present:

ALL of the following

Time/Access criteria (ANY of the following)
- Ground transport times are excessive (i.e., 30-60 minutes or longer)30-60 minutes or longer
- Weather or traffic conditions make ground ambulance transportation impractical, impossible, or overly time consuming
- Pickup is inaccessible by ground ambulance
Clinical immediacy criteria (ANY of the following)
- Member's medical condition requires immediate transportation that cannot be provided by ground ambulance and a delay may endanger life or seriously endanger health
- Services are requested by police or medical authorities at the site of an Emergency
- Advanced or basic life support is required during transportation
Member's destination is the nearest acute care hospital that can meet the member's needs

Emergency Air Ambulance - Not Medically Necessary

Emergency Air Ambulance services are not considered Medically Necessary for all other indications (i.e., when the above criteria are not met).

ANY of the following

Air Ambulance transportation that does not meet the covered indications in the Air Ambulance criteria
Any other indication not meeting ALL required medical necessity criteria above

Emergency Ground Ambulance - Medically Necessary

Emergency ground ambulance services are considered Medically Necessary when ALL of the following criteria are present:

ALL of the following

Clinical/recipient criteria (ANY of the following)
- Transport is to the nearest acute hospital that can provide services appropriate to the covered person's illness or injury
- Member's medical condition requires immediate transportation and a delay may endanger life or seriously endanger health
- Member requires transport to the nearest neonatal special care unit for newborns when that level of care is required
- Transport is to a hospital providing a required higher level of care not available at the original hospital

Emergency Ground Ambulance - On-Scene Treatment (no transport)

Emergency ground ambulance services without transport are considered Medically Necessary when:

ALL of the following

Treatment is rendered by emergency ground ambulance personnel at the scene

Emergency Ground Ambulance - Not Medically Necessary

Emergency ground ambulance transportation is not considered Medically Necessary for all other indications (i.e., when the above criteria are not met).

ANY of the following

Any transport that does not meet the emergency medical necessity criteria above

Non-Emergency Ambulance (Ground and Air) - Covered Interfacility Transport

Non-emergency ambulance transport between facilities is covered when transport meets ONE of the following:

ANY of the following

To the closest network hospital or facility that provides the required covered services that were not available at the original hospital or facility
From a short-term acute care facility to the closest network LTAC, network inpatient rehabilitation facility, or other network sub-acute facility where required services can be delivered

Non-Emergency Air Ambulance - Prior Authorization

Prior authorization requirements for non-emergency air ambulance:

ALL of the following

Prior authorization is required for non-Emergency Air Ambulance transport

Relevant Codes and Modifiers

Air Ambulance HCPCS (transport + mileage + nonemergency codes)HCPCS

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 services, nonemergency transport; one way (rotary wing)
T2007	Transportation waiting time, air ambulance and nonemergency vehicle, one-half (1/2) hour increments

Ground/Other Ambulance HCPCS (BLS/ALS/mileage/supplies/special services)HCPCS

A0140	Nonemergency transport and air travel (private or commercial) intra- or interstate
A0225	Unspecified in document (placeholder)
A0380	BLS mileage (per mile)
A0382	BLS routine disposable supplies
A0384	BLS specialized service disposable supplies; defibrillation
A0390	ALS mileage (per mile)
A0392	ALS specialized service disposable supplies; defibrillation (to be used only in jurisdictions where defibrillation cannot be performed in BLS ambulances)
A0394	ALS specialized service disposable supplies; IV drug therapy
A0396	ALS specialized service disposable supplies; esophageal intubation
A0398	ALS routine disposable supplies

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Ambulance Revenue CodesRevenue

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 Modifiers (Place of Origin/Destination)Modifier

D	Diagnostic or therapeutic site other than P or H when these are used as origin codes
X	Intermediate stop at physician's office on way to hospital (destination code only); only allowed in second modifier position
Other origin/destination modifiers	Residence, hospital, site of transfer (e.g., airport or helicopter pad), freestanding ESRD facility, hospital-based ESRD facility, patient pronounced dead, scene of accident or acute event, and other listed origin/destination locations

Authorization, Documentation & Billing Rules

Prior Authorization

Prior authorization for non-emergency Air Ambulance

Prior authorization is required for non-Emergency Air Ambulance transport. Providers must follow federal, state, or contractual requirements for authorization. Codes: A0430, A0431, S9960, S9961.

A0430, A0431, S9960, S9961

Prior Authorization

Possible prior authorization for non-emergency Ground Ambulance

Certain plans may require authorization for non-Emergency ground ambulance transport; providers must refer to applicable federal, state, or contractual requirements. Codes referenced: A0426, A0428, A0429, A0425.

A0426, A0428, A0429, A0425

Clinical and Administrative Context

Ambulance services — including ground, air, and water transport — are required when they are the only safe means to transport a member to the nearest hospital or facility capable of meeting the member's clinical needs. The mode of transportation is determined by the appropriate authorities, such as first responders or the emergency department physician, based on the nature and severity of the illness or injury. [[13]]

For air medical (air ambulance) services, coverage and medical necessity are tied to time-sensitive clinical and access considerations. Emergency air transport is considered medically necessary when criteria such as excessive ground transport time (e.g., 30–60 minutes or longer), weather or traffic making ground transport impractical, inaccessible pickup sites, or when a patient requires expedited transfer to the nearest facility that can meet their needs are met; additional requirements include request by police or medical authorities or the need for advanced/basic life support en route. Air transport that does not meet these covered indications is not considered medically necessary. [[3]]

The policy cites professional society position statements and peer-reviewed studies supporting selective use of air medical services for time-sensitive conditions such as trauma, acute stroke, and STEMI. Joint position statements (NAEMSP/ACEP/AMPA) emphasize that air medical services should be used in a clinically effective, safe, and fiscally responsible manner and reserved for primary patient-centered goals such as expedited delivery for time-sensitive interventions, access when distance or remoteness prevents timely ground transport, or initiation/continuation of advanced care not available locally. AMPA position statements support air transport for certain ACS/STEMI and acute stroke scenarios when clinically indicated. [[32]][[33]]

UnitedHealthcare emphasizes fiscal responsibility and alignment with federal, state, and contractual requirements: non-emergency air ambulance transport requires prior authorization, and coverage decisions are made in the context of clinical effectiveness, documented need (including transport times and origin/destination), and applicable regulatory or contractual rules. The policy revision dated 07/01/2025 is described as a Template Update with reference updates. [[17]][[4]][[38]]

Defined Terms

Definitions

Air Ambulance (Fixed wing)Transportation by a fixed aircraft certified as a fixed wing air ambulance (per 42 CFR 414.605).

Air Ambulance (Rotary wing)Transportation by a helicopter certified as an ambulance (per 42 CFR 414.605).

Covered Health Care Service(s)Services, supplies, or pharmaceutical products determined by UnitedHealthcare to be medically necessary for preventing, evaluating, diagnosing, or treating a condition.

EmergencyA medical condition with acute symptoms of sufficient severity that a prudent layperson could reasonably expect absence of immediate medical attention to result in serious jeopardy, organ dysfunction, impairment of bodily functions, or death.

Medically NecessaryHealth care services that are clinically appropriate, in accordance with generally accepted standards of medical practice, not primarily for convenience, and not more costly than an alternative that is at least as likely to produce equivalent results.

Policy Changes & Versioning

07/01/2025Template Update (non-material)Latest

Template update: removed content/language pertaining to Mississippi, updated Clinical Evidence and References sections, and archived previous policy version CS003.R.

OpenPayer

Ambulance Services (Emergency & Medical Transportation)

Medical Necessity Criteria for Ambulance Services

Relevant Codes and Modifiers

Authorization, Documentation & Billing Rules

Clinical and Administrative Context

Defined Terms

Policy Changes & Versioning