iatros denotes a medical practitioner, whether invoked in a healing saying, described as treating illness, or named as Luke's occupation.

The occurrences consistently denote a medical practitioner: one is named in a greeting, practitioners are associated with treating illness, and the singular is used in sayings contrasting those who need treatment with those who are well or strong. The evidence shows one attested use across varied clauses rather than distinct lexical senses.

1. Medical practitioner in healing and treatment contexts · dominant

   In Luke 5:31, Mark 2:17, and Matthew 9:12, the singular genitive form occurs in the saying that those who are well or strong have no need of such a practitioner, whereas the sick do. Luke 8:43 and Mark 5:26 use plural forms for the people to whom a woman had turned during her long illness; Luke 4:23 addresses one directly in the proverb about healing oneself, and Colossians 4:14 names Luke with the nominative singular form.

   Luke 5:31Mark 2:17Matthew 9:12Luke 8:43Mark 5:26Colossians 4:14

In the Anselm Project Bible: The APB presents the term as “physician” in the sayings, the direct address, and Luke's description, while plural occurrences are rendered “physicians.” These renderings confirm the verse-level context rather than establish finer distinctions.