Health Nexus is a new blockchain and decentralized database for healthcare. We're taking some fundamental operations common to operating systems - account management, permissioning, file handling, and decentralizing them; which is why I think of it like a decentralized operating system.

Most other healthcare decentralization efforts are applications that can be built on Health Nexus. That's how we envision it working - service providers that understand decentralization and are crypto-savy will build applications on Health Nexus and use familiar SaaS models to engage healthcare providers (that don't really have crypto-economic experience and don't want to).

It's a Decentralization as a service (DaaS) model. 

I'm a blockchain engineer on this project. No tokens have been distributed yet, and Health Cash (HLTH) will not be tradeable until after the ICO completes in March of 2018.

I'm not sure I understand your question. If you are asking about the transaction cost of using smart-contracts on the blockchain. The increase in cost is primarily related to one of two things: the increase in data that is processed in smart-contract transactions over time, and the increase in the value of the transactional cryptocurrency.

The first is something you may be able to solve for programatically, the second is balanced against the corresponding increase in value of your holdings.

If you're asking about something else, please clarify.