When scanning color negative film, the film code can be useful. It tells you which film stock was used, which can be used in some software to get a good starting point preset.
If you’re using Lightroom for the conversions to a positive image, you’ll probably find that settings for one film type are a very useful starting point for other instances of the same film. I outline how to accomplish this in Digitizing Your Photos.
• Kodak film codes can be found here, compiled by Tom Philo.
• Fuji film codes can be found in their data guide, found here.
• Here’s a list published by Vuescan.