This code system http://hl7.org/fhir/v2/0570 defines the following codes:

CodeDisplayComments
CASHCash
CCCACredit Card
CCHKCashier's Check
CDACCredit/Debit Account
CHCKCheck
DDPODirect DepositEFT
DEBCDebit Card
SWFTSociety for Worldwide Interbank Financial Telecommunications (S.W.I.F.T.)
TRACTraveler's Check
VISNVISA Special Electronic Funds Transfer Network