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What is the purpose of sequencing in medical coding?

  1. To provide training and certification for coding professionals

  2. To arrange codes in the proper order based on alphabetical order

  3. To maintain the diagnosis portion of ICD-9-CM

  4. To arrange codes in the proper order according to the definitions of principal or primary diagnosis

The correct answer is: To arrange codes in the proper order according to the definitions of principal or primary diagnosis

The purpose of sequencing in medical coding is to arrange codes in the proper order according to the definitions of principal or primary diagnosis. This ordering is essential for accurately reflecting the patient's conditions and ensuring proper billing and reimbursement. By sequencing codes correctly, it helps to identify the primary reason for the encounter or the main condition being treated, which is crucial for coding accuracy and for establishing medical necessity.