Ambulance billing for ground ambulance services: emergency and non-emergency transports, medical necessity from the patient care report, physician certification statements, prior authorization for repetitive trips, origin and destination modifiers and mileage, billed to Medicare, Medicaid and commercial plans.
An ambulance claim is built from the crew’s patient care report. The level of service is set from the care given, medical necessity is shown from the patient’s condition, non-emergency trips have the certification or authorization they need, mileage is billed to the tenth of a mile, and every denial is appealed or corrected until it is resolved.
$453M
in improper Medicare payments to ambulance suppliers in CMS’s 2025 review, a 10.4% improper payment rate
24.9%
of those ambulance errors failed medical necessity, and another 58.2% were missing or insufficient documentation
Medicare pays for an ambulance only when any other way of getting there would put the patient’s health at risk, and the claim has to show it. For non-emergency trips, that means a physician certification statement and, for repeated scheduled trips, prior authorization. The crew’s report is the main evidence, so a narrative that says “transported without incident” and nothing about the patient’s condition can sink a claim that was medically justified.
The patient care report decides the claim. That is why we read each report for the patient’s condition, the care given and the trip details before choosing the level of service and sending the claim.
Ambulance services bill emergency calls, scheduled non-emergency trips and the miles between them. Each has its own proof. Here is where each breaks, and what we do about it.
Pays forEmergency responses at the basic, advanced or specialty care level, with the miles to the nearest appropriate facility.
Where it breaks
What we do
Pays forScheduled transports for dialysis, wound care, radiation and discharges, with certification and authorization.
Where it breaks
What we do
Pays forLoaded miles to the destination, with origin and destination modifiers on every line.
Where it breaks
What we do
A repetitive, scheduled non-emergency ambulance transport is three or more round trips in 10 days, or at least one round trip a week for three weeks or more, typically for dialysis or wound care. Medicare covers these trips only with a physician certification statement dated no more than 60 days before the transport, showing why the patient cannot safely travel another way. A bed-confined patient must be unable to get up from bed without help, unable to walk and unable to sit in a chair or wheelchair.
Since August 2022, Medicare has required prior authorization for these transports nationwide. The first three round trips in a 30-day period can be billed without it; after that, claims without an affirmed request are stopped for review. The contractor decides most requests within seven calendar days, and an affirmation can cover up to 40 round trips in 60 days.
What we do: when a patient starts scheduled transports, we collect the certification and the records, send the prior authorization request before the fourth round trip, and track the affirmed trip count and end date so the next request goes in on time.
Ambulance claims pair a service level with mileage, and every line carries the trip’s origin and destination. These are the codes behind most of them.
| Code | What it covers | What payers look for |
|---|---|---|
| A0429A0428 | Basic life support, emergency and non-emergency | The patient's condition and the reason another way of travel was unsafe. |
| A0427A0426 | Advanced life support level 1, emergency and non-emergency | An ALS assessment or intervention documented. |
| A0433 | Advanced life support level 2 | The required number of drug administrations or a qualifying procedure. |
| A0434 | Specialty care transport | Care beyond the paramedic level, between facilities. |
| A0425 | Ground mileage, per statute mile | Loaded miles, to the tenth of a mile under 100. |
| A0430A0431 | Fixed wing and rotary wing air transport | Why ground transport was not appropriate. |
| A0435A0436 | Fixed wing and rotary wing air mileage | Loaded miles from pickup to destination. |
Two letters on every line: the first for where the trip began, the second for where it ended, such as R for residence and H for hospital.
A transport arranged by a hospital or other provider under arrangement.
A transport furnished directly by a provider of services.
More than one patient transported on the same trip.
Medicare: a transport that does not meet the ambulance benefit, so a secondary plan can be billed.
Medicare: a non-emergency trip that may not be covered, with a signed notice.
Sources: Medicare Benefit Policy Manual, chapter 10 (ambulance services); Medicare Claims Processing Manual, chapter 15 (ambulance); 42 CFR 410.40. HCPCS descriptions are summaries. Reviewed October 2026.
It is not for every practice. If you are a hospital-employed group whose billing the hospital handles, you do not need us. And if your in-house team keeps denials low and receivables current, keep them, and consider a periodic billing audit instead.
We look at your clean-claim rate, your denials by payer and reason, medical necessity from run reports, certification statements, prior authorization and mileage, and your aging receivables, and tell you what we find, whether or not you go further with us.
We get access to your practice management system and clearinghouse, load each payer's authorization and bundling rules and your fee schedules, list patients on scheduled transports and their authorizations, and agree how escalations work. Most practices are live within one to two weeks.
Transports and mileage are coded and claims submitted within 24 hours. Rejections are corrected the same day, remittances posted as they arrive, run reports, certifications and authorizations checked, and denials worked to their cause, all inside your system.
A report you can read in ten minutes: what was billed and collected by payer, site and service line, what was denied and why, authorizations pending, and what is aging.
You do not change systems to work with Summit Billing Solutions. We work in the software you already use and through your existing clearinghouse. The systems below are the medical practice systems we work in most; tell us what you use, and we will confirm how we would work in it.
95-98%
First-pass claim rate
24 hrs
Claims submitted within
28
Average days in A/R
Ambulance services often wait longest to be paid, because claims are reviewed for medical necessity and appealed. A fee that is a share of collections means we are paid only when those claims are.
Summit Billing Solutions charges between 3% and 9% of monthly collections. Your rate depends on transport volume, the share of emergency and scheduled trips, your Medicare and Medicaid mix and the state of the receivables, which we see in the free account review.
3% to 9%
of monthly collections
We bill for more than 40 specialties, for practices in all 50 states, from Salem, New Hampshire. Each one has its own codes, modifiers and payer rules.
A free account review looks at your clean-claim rate, your denials by payer and reason, medical necessity from run reports, certification statements, prior authorization and mileage, and your aging receivables, and tells you what we would change. No cost, no obligation, and no pressure to continue. What the review covers, step by step, is on the free account review page.
50A Northwestern Dr Ste 3, Salem, NH 03079-4827
603-207-3172
(866) 906-3116
info@summitbillingsolutions.com
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