This case-insensitive code system http://hl7.org/fhir/us/davinci-pdex/CodeSystem/PDexAdjudicationCS defines the following codes:

Code	Display	Definition
coinsurance	Co-insurance	The amount the insured individual pays, as a set percentage of the cost of covered medical services, as an out-of-pocket payment to the provider. Example: Insured pays 20% and the insurer pays 80%.
noncovered	Noncovered	The portion of the cost of this service that was deemed not eligible by the insurer because the service or member was not covered by the subscriber contract.
priorpayerpaid	Prior payer paid	The reduction in the payment amount to reflect the carrier as a secondary payor.
paidbypatient	Paid by patient	The amount paid by the patient at the point of service.
paidtoprovider	Paid to provider	The amount paid to the provider.
paidtopatient	Paid to patient	paid to patient
memberliability	Member liability	The amount of the member's liability.
discount	Discount	The amount of the discount
drugcost	Drug cost	Price paid for the drug excluding mfr or other discounts. It typically is the sum of the following components: ingredient cost, dispensing fee, sales tax, and vaccine administration