I understand that when praying for a sick person, whether privately or in a mishaberach following the Torah reading, one should omit honorifics; e.g. not to use "HaRav" when praying for a rabbi, or not inserting "haKohen" or "haLevi" in the name for a kohen or levi. For example, just last night, our rav had us pray for an ill levi without mentioning his tribal status when giving us his name. Many people I know, however, don't know this. What is the source and reasoning for excluding the honorific, and are there any contrary opinions? Is including honorifics wrong?