There is a weird dynamic about doctors and the way medicine is these days.

Doctors USED to have to diagnose a person, so their word was 'law'. They did the work before they sent you out to a machine, scan or specialist.

Some of the older doctors still haven't embraced the idea that they cannot look at a person, or do a phone interview and diagnose a person based on a chart or patient history. Sometimes they think the old ways are the best.

They also take it as an affront to their experience and knowledge.

Some of the younger doctors put too much emphasis on modern technology and don't try to find time to know their patients.

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Their are other reasons why doctors will/will not prescribe or order additional tests.

With meds, some doctors do 'deal's with manufacturers and sales reps. Discounts, freebies and other perks are common. The more they prescribe the more they are rewarded by the drug companies.

With diagnostic procedures and tests some physicians are not reimbursed in a timely manner by the government or insurance companies when they bill for them.

As the elections go on, and if the topic of health care isn't buried by other issues, you'll see some of the health care pros oppose the idea of a government backed health system. Sadly, it comes down to money.