Anyone can use the blockchain technology since it's really just a ledger of transactions at the end of the day. It all boils down to the customization of the said technology based on what the company/organization
actually needs work on. Most are also just joining the hype train and using the popularity of the said tech thinking that it's 'the next big thing' since everybody else is doing it, while in reality there aren't any significant advantage of integrating it on their services compared to their older systems. With the world slowly shifting into the digital realm, it's time that most companies also change their systems to keep up with the pace, but integrating blockchain into an organization isn't always the answer. Blockchain is revolutionary, but not always the go-to solution IMO.
I am yet to hear a good argument for blockchain in healthcare. The arguments I have heard thus far can be broadly summarised in to two categories: patient records or fees.
The patient record argument goes somewhat along the lines of every patient would have a unique identifier, and upon presentation to any healthcare provider, the provider can scan this identifier and access their records on the blockchain. There are a few issues with this. Firstly, this system already exists in many countries, and works just fine without blockchain technology. Secondly, you need to regulate access to the database as it contains confidential health information - that becomes more difficult as your database becomes decentralized and spread over many remote computers and sites.
Medical records are fine as is, and also, using the concept of a blockchain technology in such an application
might affect medical record confidentiality in such a way that your information is floating freely, waiting for everyone to see. Medical databases are fine and already secure, so yeah, the healthcare industry doesn't really need this tech for sorting and storing medical records.
The fee argument is along the lines of streamlining the interface between patient and provider, removing some of the insurance companies' oversight and paperwork, and therefore reducing fees. This is only a problem in the US - no other country in the world has such a ridiculous healthcare system. A much better solution would be to simply move to a more logical system, and blockchain is not needed at all to do that.
If anything, the blockchain would somewhat make things worse for healthcare providers. Imagine the added layers of confusion just to get the file that you really wanted to look at.