Statement of one needing doctor? Job description's the opposite (9)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

I’ M PATIENT (statement of one needing doctor). In the Bible, Job is said to have had great patience because of his extraordinary endurance in the face of immense suffering, and this has given rise to the saying ‘The patience of Job’. This is a tricky clue because the definition and answer are what Job was not, but the wordplay alludes to what he was!