Applying for both L1 and H4 visa


I’m in the US on an H1-B. My fiance and I are getting married in 3 months. She’s also looking to get an internal transfer with her current company which might allow her to come to the US on an L1 (individual) visa.

Can she apply for an L1 and H4 visa at the same time? I read somewhere that if she applies for an H4 that the embassy might void her L1 stamp.