Category: Algorithms

Validating NPI – Luhn Algorithm

by papadiddydoo | Jan 15, 2013 | Algorithms, Programming | 0 |

Sample NPI Number – 1295723567 Step 1 (take first 9 digits, last digit is check digit) 129572356 check digit 7 Step 2 prefix 80840 80840 129572356 Step 3 Double the value of alternate digits, beginning with the rightmost...

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Category: Algorithms

Validating NPI – Luhn Algorithm

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