I would use a dispatch table: 
my %function = (
  allergies => sub { print "in allergies\n" },
  immunizations => sub { print "in immunizations\n" },
);
...
$function{$file}->() if exists $function{$file};

[download]

(Untested)
The empty while part can be deleted, its condition is probably wrong anyway.

In reply to Re: How to call a Sub / Function with changing name by choroba
in thread How to call a Sub / Function with changing name by kevyt

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