Is it better to have an insurer with a TPA for my group mediclaim, or should one pick an insurer that processes claims in-house i.e. on their own?

Both in-house claim departments and TPAs provide effective processes for health insurance claim settlements. The in-house claim process allows the insurance company to exert better control. This includes easier claims handling and a  lower turn-around time (TAT) for policyholders. TPAs have their own cashless hospital networks which are generally wider than most insurers.