First of all, if it is insolvent and not a willful default or refusal to pay the amount due, it is necessarily not illegal.
Secondly, if it is not a refusal to pay the amount due, but because of special circumstances that lead to arrears, is a civil dispute.
Thirdly, if it is due to special circumstances, (eg: ambulance breakdown, medical equipment failure, patient accident, etc.) resulting in its refusal to pay the amount due, also belongs to civil disputes. The police will usually come to assist the two sides to mediate and negotiate.
(All of the above a **** the same premise, that is, the hiring party did not borrow the rental behavior profit, if there are subjective and objective profit behavior, unless the amount is low, or necessarily illegal)
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If the use of hospital ambulances to transport patients and can not afford to pay back the words, you can negotiate with the hospital.
Generally, hospitals can help special patients apply for special treatment, such as a reduction in the amount of money needed for medical treatment.
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If the ambulance, paramedics, and medical equipment are rented (not borrowed or hired) from the hospital or a third party, and you make a profit from them, this is a criminal case.
If no profit is made, the penalty is based on the exact amount of money involved.
But as I understand it, the amount is not too low unless it's very close and there are no paramedics traveling with them and no medical equipment is used.
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Finally, it's impossible to analyze specifically because the specifics are not known.
First point: the reason for non-payment, whether it is delinquency, refusal to pay or insolvency.
The second point: whether the party owning the rented ambulance is the hospital or a third-party rental agency.
The third point: a clear lease, hire or loan, which is used to determine the relationship between the two parties. Leasing and hiring are still different.
The fourth point: whether there is a profit-making behavior.