Why don't they do all possible blood tests?

[Guest guest]

Ok, tossing this one out. Every time I see an additional doctor or one

in a different field, I find myself having more blood tests for

different things. The nephrologist found several things that the

primary, pulmonologist, hospital and rheumatologist didn't test for. One

seems so simple but it was a huge Vitamin D deficiency. I'm just

wondering why with patients known to have complicated illnesses or

several conditions that one can't run all the tests at once for all the

doctors to ultimately use. Now, many of mine have been used by other

doctors but there is just always more. The nephrologist also found

another thing that meant a referral to another specialist

-hematologist/oncologist. I would have thought 22 tubes of blood in

Chicago would have been enough...lol. But each doctor looks at all my

blood tests which have been done and then orders just a few more. Just

seems to me that with all my trips to a doctor and blood taken, finding

an extreme Vitamin D deficiency should have been done long ago.