Using "wegen" at an reception/information desk to ask for information

Question

would it be correct to use "wegen X" as an equivalent to "for X" at a reception desk.

For example "Hi, for the blood test, should I...". Would it be equivalent to "Hallo, wegen dem Bluttest, sollte man links oder rechts gehen?. .."

Answer 1

First, wegen requires the genitive, so it must be

Hallo, wegen des Bluttests, ...

For the question which word to use, yes, you can use either für X or wegen Y, both would be correct. Which one would sound more natural would depend a bit un the exact wording.

The version with wegen would be the best choice as an introduction to another complete sentence. Examples:

Wegen des Bluttests: Darf ich da vorher etwas essen, oder muss ich nüchtern sein?
(For the blood test: may I eat something before or do I need to have an empty stomach?)

Wegen des Bluttests sollte ich mich bei Doktor Müller melden.
(With respect to the blood test I should report to Doktor Müller)

Wegen des Bluttests hätte ich da noch ein paar Fragen
(With regard to the blood test, I still have some questions)

In your concrete example with direction, wegen is also possible, but I would probably rather say

Für den Bluttest, muss ich da nach rechts oder links?
or even
Zum Bluttest, muss ich da nach rechts oder links?

But that is a matter of style rather than a matter of right or wrong.