Employers will almost exclusively hire transcriptionists who have completed some kind of formal training in the area or who have experience. There are many ways to obtain such training, but for most a community college or vocational school will be the best option, especially if the training includes on-the-job experience. Do not worry about whether or not they offer the opportunity to earn the Certified Medical Transcriptionist designation. This is not a required certification in general, and in fact, most transcriptionists need a couple of years’ experience before they can pass the test to gain this designation. I am not a CMT, but I was able to find a job.
Courses typically take several months to two years to complete, depending on the school chosen. Many vocational schools include the cost of books and course materials in their tuition, which may be helpful after you have landed a job. If you already work in a medical field, and simply want to switch to working from home, you may only need to learn transcription, as you may already have the vocabulary you need, but think carefully, as a refresher course may not be an entirely bad thing either.
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