patient_signature_source_type

Valid Values:

Value
"Signed authorization form(s) for HCFA block 12 and 13 on file"	"Signed HCFA-1500 Claim Form on file"
"Signed authorization form for HCFA block 13 on file"	"Signature generated by provider because patient was not present"
"Signed authorization form for HCFA block 12 on file"