You are not entitled to reimbursement of your expenses for medical treatment by the Norwegian state if you are in Norway on a visitor's visa and reside in a country that does not have an agreement with Norway on mutual right to healthcare.
If you are in Norway on a visitor's visa, you need to have health insurance that will cover your healthcare expenses. You will have to cover the expenses yourself if you do not have a health insurance.
If you need urgent medical care, the health services cannot reject you even if you will not be able to pay for the service. The health services might send you a bill afterwards, but the health institution will be able to cover the cost of the healthcare if you are unable to pay.