Either credential will portray basic CDI knowledge, IMO. From the many CDI job postings I've seen, both are accepted. I chose CCDS, due to the extensive resources available through ACDIS website.
Richard Guerzon, RN, CCS, CCDS
I am not w/o prejudice since I am on the ACDIS Board, but I chose ACDIS several years ago because:
1. Active MD participation noted within ACDIS on our Board, and also demonstrated per articles, seminars, presentation.
2. I concur with Richard that the resources on the ACDIS site are very helpful
AHIMA may have similar attributes, I don't know? But, I see no real need to be both CCDS and CDIP certified.
Paul Evans, RHIA, CCDS, CCS, CCS-P