The earnings of medical assistants vary, depending on their experience, skill level, and location. Median annual earnings of medical assistants were $24,610 in May 2004. The middle 50 percent earned between $20,650 and $28,930. The lowest 10 percent earned less than $18,010, and the highest 10 percent earned more than $34,650. Median annual earnings in the industries employing the largest numbers of medical assistants in May 2004 were: