What is the first step when validating a DEA number?

The correct approach to validating a DEA number begins with adding the 1st, 3rd, and 5th digits of the DEA number together. This step is crucial because the DEA number's validity relies on a specific algorithm that incorporates both the odd and even positions of the numbers. By summing these digits together, you create a foundational part of the calculation that will eventually help verify if the DEA number is legitimate.

Once you have the sum of the 1st, 3rd, and 5th digits, you will then proceed to multiply the sum of the 2nd, 4th, and 6th digits by 2. This product, combined with the previous sum, will be used to check against the last digit of the DEA number for validation. The process not only ensures that the number follows a standardized format but also helps prevent misuse or fraudulent DEA number usage in the pharmacy and healthcare settings.

Each step of the validation method is interconnected, and starting with the correct summation lays the groundwork for the subsequent calculations needed to confirm the adequacy of the DEA number.