Answer to Question 1
Open item and balance forward.
Answer to Question 2
Any four of the following:
Claims or equivalent encounters and coordination of benefits (ANSI 837)
Remittance and payment advice (ANSI 835)
Claims status inquiry (ANSI 276) and response (ANSI 277)
Eligibility and benefit inquiry (ANSI 270) and response (ANSI 271)
Referral certification and authorization (ANSI 278)
Health plan premium payments (ANSI 820)
Enrollment and de-enrollment in a health plan (ANSI 834)
Retail drug claims, coordination of drug benefits and eligibility inquiry (NCPDP 5.1)