Hello Fenil,
I see -- and are Communication, ChargeItem, Schedule, and Slot also not available? I presume that Schedule and Slot aren't, since Slot depends on Appointment and Schedule depends on Slot. For Communication and ChargeItem, I've been a bit confused trying to find out where exactly one might find references to id's for these resources inside other patient-accessible resource documents. It sounds to me as though Communication pertains more to records of communications to and from a health provider that don't necessarily involve the patient, while ChargeItem can be requested if you know that it is associated with an Encounter and you supply the Encounter id via the "context" parameter in the request, but (at least in the test data) I can't tell from the Encounter document whether it is automatically associated with a ChargeItem or not.
Thanks,
Francesca