How can insurance companies find out if you enjoy a pre-existing condition??

I have heard ancestors mention the MIB as a source, but where do they get their info? I thought medical library were strictly private, how do they find out your past medical info? Ty!
Records are private between you and your insuring company and any company you apply for coverage next to.
Another way pre-existing conditions are discovered by the insurance company is looking into your medical records after you already own a policy and file a claim.
For example lets articulate on your application you "forget" to mention you have been suffering from headache for the last year and have already be to the doctor. You get your new form policy and rush to the Doctor with these headaches and your DR files a claim. The insurance company next request your medical records from the DR and bingo they find you have be seeing this DR for a year with these headaches. In this grip the insurance company can rescind your policy and deny all claims. you will be refunded adjectives premiums and you will have to pay your medical bills out of
pocket.
They also consider symptoms that would own caused a reasonable entity to seek treatment to be a pre-existing condition. Example, you have a lump on you collar but don't seek treatment until you buy health insurance. When you progress to the DR he says when did you notice the lump and you vote 6 weeks ago. Bingo pre-existing condition.

Your prescription history is also reported to the MIB.
You can request your MIB below
When you apply for an insurance policy, you sign a waiver agreeing that the health insurer is permitted to have use of your medical information as it pertains to the policy.

This mode that they are entitled to discuss your medical conditions with your doctors, and they also have the right to check your information surrounded by the MIB.

If you don't sign the waiver allowing them reasonable access to your medical background, they aren't going to issue a policy.

MIBs get data from insurance companies - both condition and life.


Answers:    Insurance companys maintain databases of claims experience that they upload to the Medical Information Bureau. So for example, if Anthem has claims experience on you, they upload it to the bureau and United healthcare can then access your claims experience facts.

That aside, many times the information gleaned from your first or second claim makes it in full view that you have a prexisting condition. For example, when you fill your first prescription, and it is for an insulin base product - voila - you have diabetes and chances are you weren't a moment ago diagnosed. At that point, they go to your physician for additional information (onset of disease, etc), and i.e. where you get hit near PreEx
Good point...I'll be watching for the answer on this one!!
they check back next to other carriers that you had insurance beside