Ambulance Services – Commercial and Individual Exchange Medical Policy
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Defines medical necessity, coverage rationale, limitations, prior authorization rules, applicable codes, definitions, and clinical evidence for emergency and non-emergency ground and air ambulance services for UnitedHealthcare Commercial and Individual Exchange plans. This is Part 1 of 2 and includes criteria, exclusions, codes, and supporting evidence.
01/01/2026 Template Update: Created shared policy version to support application to Oxford plan membership and archived previous policy versions MP.001.23 and TRANSPORT 002.32
Coverage Summary
This policy (Part 1 of 2) defines medical necessity and coverage criteria for both emergency and non-emergency ground and air ambulance services (including rotary and fixed wing air ambulances) for UnitedHealthcare Commercial and Individual Exchange plans. It lists covered indications and limitations, applicable HCPCS and revenue codes, definitions (for example Air Ambulance and Medically Necessary), and cites clinical and regulatory guidance informing coverage decisions. Prior authorization is required for non‑emergency Air Ambulance transport and may be required for non‑emergency ground ambulance depending on the member's specific plan.
Medical-Necessity Criteria
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
- The 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 are excessive (i.e., 30-60 minutes or longer); weather/traffic make ground impractical; pickup point inaccessible by ground
- The member's destination is the nearest acute care hospital that can meet the member's needs
ONE of the following
- Services are requested by police or medical authorities at the site of an Emergency
- Advanced or basic life support is required during transportation
Emergency Air Ambulance - Not Medically Necessary
Emergency Air Ambulance services are not considered Medically Necessary for all other indications.
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
ALL of the following
To one of
- The nearest acute hospital that can provide services appropriate to the covered person's illness or injury
- The nearest neonatal special care unit for newborn infants when required level of care is needed
- A hospital that provides a required higher level of care that was not available at the original hospital
- A delay in transportation time may endanger the member's life or seriously endanger the member's health
- Advanced or basic life support is required during transportation
Emergency Ground Ambulance - Medically Necessary without transport
Emergency ground ambulance services without ground transportation are considered Medically Necessary when:
Emergency Ground Ambulance - Not Medically Necessary
Emergency ground ambulance transportation is not considered Medically Necessary for all other indications.
Non-Emergency Ambulance (Ground and Air) - Covered when ONE of the following is met
Coverage includes non-Emergency ambulance transportation between facilities only when transport meets one of the following:
ANY of the following
- From an out-of-network hospital to the closest network hospital when Covered Health Care Services are required
- To the closest network hospital that provides the required Covered Health Care Services that were not available at the original Hospital
- From a Short-Term Acute Care Facility to the closest network Long-Term Acute Care Facility (LTAC), network inpatient rehabilitation facility, or other network Sub-Acute Facility where the required Covered Health Care Services can be delivered
Non-Emergency Ambulance - Benefit level depends on origin
The applicable benefit level for eligible non-Emergency ambulance transportation depends on member pick-up location (origin):
ANY of the following
- If member is inpatient and transported from a hospital to another hospital or inpatient facility, coverage levels may vary
- If member is in a sub-acute setting and transported to an outpatient facility and back, coverage is under the benefits that apply to that sub-acute setting (example: skilled nursing facility transports covered under SNF/IRF section of the Certificate of Coverage)
Not Medically Necessary / Exclusions
Claims may be denied when services fall outside the stated coverage criteria — for example when the transport mode is inappropriate given the clinical criteria (including use of air transport that does not meet air ambulance indications), the provider is not properly licensed to perform the ambulance service, the transport is non‑ambulance (e.g., taxi, rideshare, commercial/private aircraft or police car), the transport is primarily for convenience, or when the transport violates required notification or benefit‑specific rules. Prior authorization requirements for non‑emergency air (and plan‑dependent ground) must also be met.
Coding
| 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 (must be billed in place of origin/destination combo) |
| R | Residence |
| 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 |
| A0225 | Ambulance service, neonatal transport, base rate, emergency transport, one way |
| 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 |
| A0394 | ALS specialized service disposable supplies; IV drug therapy |
| A0396 | ALS specialized service disposable supplies; esophageal intubation |
| A0398 | ALS routine disposable supplies |
| A0420 | Ambulance waiting time (ALS or BLS), one-half (1/2) hour increments |
| 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 |
| 42 CFR 414.605 | Definitions; Fee Schedule for Ambulance Services |
| 42 CFR 460.100 | Emergency Care |
Provider Actions
Prior authorization for non-emergency Air Ambulance
Prior authorization is required for non-Emergency Air Ambulance transport.
Prior authorization for non-emergency ground ambulance (plan dependent)
Certain plans may require prior authorization for non-Emergency ground ambulance transport; refer to the member specific benefit plan document.
Medical records documentation for reviews
Medical records documentation may be required to assess whether the member meets the clinical criteria for coverage but does not guarantee coverage; reviewers may request records. Benefit coverage is determined by the member specific benefit plan document and applicable laws.
Ambulance modifier reporting
Ambulance claims are billed with two modifiers: the first indicates place of origin and the second indicates destination. Exception: QL must be billed in place of the origin/destination combination in applicable cases.
- D
- E
- G
- H
- I
- J
- N
- P
- QL
- R
- S
- X
Exclusions and denial conditions
Claims may be denied when providers are not properly licensed, when Air Ambulance transport does not meet covered indications, when transport is non-ambulance (e.g., taxi, rideshare), when ambulance transport is not appropriate (including transport for convenience), or when notification criteria are violated.
Certificate of Medical Necessity completion
Receiving physician or the transport program medical director may complete the Certificate of Medical Necessity on scene transports; medical necessity should be documented based on regional policy and the requesting authorized provider's best medical judgment.
Air medical use must meet at least one primary goal
Air medical transport requests that do not meet at least one of the three NAEMSP/ACEP/AMPA primary patient-centered goals risk being considered not medically necessary.
- Initiation or continuation of advanced or specialty care not available locally from hospital or GEMS
- Expedited delivery to definitive care for time-sensitive intervention
- Extraction, evacuation, or rescue from environments difficult to access (geography, weather, remote location, distance)
Use member-specific benefit plan
Verify the member specific benefit plan and applicable federal/state mandates when deciding coverage; when there is a conflict, the member specific benefit plan governs.
Background, Evidence & Definitions
This policy explains how medical necessity is determined for ambulance services (ground and air), provides definitions of key terms (for example rotary and fixed wing Air Ambulance and Emergency), and references field triage and national EMS/air‑medical guidance to inform coverage decisions. It cites evidence and expert position statements — including NAEMSP/ACEP/AMPA joint guidance and AMPA statements on STEMI and acute stroke — and clinical studies that examine transport times, outcomes, and scenarios where air transport may be appropriate (for example remote or time‑sensitive cases). The purpose is to align coverage determinations with generally accepted standards of medical practice and regional EMS/triage policy.
| Citation | Key finding |
|---|---|
| Rhodes et al. 2023 | Retrospective single-center trauma registry showing prolonged transport times associated with worse GCS and increased deaths; supports direct HEMS launch in rural/time-critical scenarios. |
| Kunte et al. 2021 | Retrospective stroke transfer study: air transfers faster when distance >40 miles; transfer mode not independently associated with outcome when controlling for therapies. |
| Stewart et al. 2021 | Retrospective cohort: helicopter transfer associated with decreased 72-hour mortality for transfers <90 miles; mixed findings and potential overtriage. |
| NAEMSP/ACEP/AMPA Joint Position (Lyng et al. 2021a) | Defines three primary goals for air medical transport and emphasizes GEMS preference when appropriate. |
| AMPA Position (2012, 2004/2012 update) | Supports air transport for ACS/STEMI and acute stroke when timely interventions are needed and not available locally; medical necessity determination by requesting provider. |
| Term | Definition |
|---|---|
| Air Ambulance | Medical transport by rotary wing (RW) or fixed wing (FW) aircraft as defined in 42 CFR 414.605. |
| Rotary wing Air Ambulance (RW) | Transportation by a helicopter certified as an ambulance and such services and supplies as may be Medically Necessary. |
| Fixed wing Air Ambulance (FW) | Transportation by a fixed wing aircraft certified as an ambulance and such services and supplies as may be Medically Necessary. |
| Medically Necessary | Services that are in accordance with Generally Accepted Standards of Medical Practice, clinically appropriate, not mainly for convenience, and not more costly than an alternative providing equivalent results. |
| Emergency | A condition with acute symptoms of sufficient severity that a prudent layperson could reasonably expect absence of immediate medical attention to result in placing health in serious jeopardy, serious impairment of bodily functions, or serious dysfunction of any bodily organ or part. |
| GEMS | Ground Emergency Medical Services. |
Medicare Determinations
| Name | Type/Number | Effective Date |
|---|---|---|
| Medicare Benefit Policy Manual, Chapter 10 - Ambulance Services | NCD |
Revision History
Template Update: Created shared policy version to support application to Oxford plan membership and archived previous policy versions MP.001.23 and TRANSPORT 002.32
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