R.L.
Dropping weight in infants is a very big deal and could be a symptom of other problems, especially with twins who are almost always born premature and are at risk for under developed lungs and other respiratory issues. So yes the hospital can charge more. You may not feel that they had a right to charge more, but they do so because those babies were classified as in need of different care. You may not have seen the extra monitoring, extra nurse or doctor visits, but they were there, even if a doctor just looks at their charts one extra time it will cost more.
If you have insurance though, it does not matter what your hospital charges because they can only bill you what your insurance states is your copay/coinsurance.
If you don't have insurance, call the billing department and ask for a medical review of the charges and diagnosis and state exactly what you said here that you do not feel that the service were warranted. They will have the medical records reviewed and have an explanation for you on why the charges are higher, or will remove any unnecessary charges. If that does not work you may have to write a dispute letter and/or request your medical records. Also ask what kind of financial arrangement they can make. many hospitals will discount the services if there is no insurance, they will definitely set up a payment plan, and also most offer prompt pay discounts.
I've been working in insurance and hospital billing for 15+ years, please feel free to send me a message if you need any more info or assistance.
R. :)