What credentials?

To my understanding it is just CCRN, but that you aren't supposed to use the title outside of specialty(ies) you have certified in. For example if you got floated to a PICU then you shouldn't be representing yourself as a CCRN.

Personally I put my specialty afterwards in parentheses for things like emails since I work across multiple departments and see preemies through geriatrics.

Ex:

PeakRN, BSN, RN, [other board certs I have]..., CCRN (Pediatric)

Congrats!

I personally just put CCRN--writing out 'neonatal' practically turns the credential into a sentence (especially if you have more than one specialty certification). Unless you're in a situation like Peak described above, for most nurses it's safe to assume that you're only going to be practicing within your own specialty. Even if you get floated for the occasional shift, it won't make a practical difference (unless you're physically signing your name and CCRN credential, in which case you'd simply leave the CCRN off of your signature).

The only place where I spell it out is on my resume, since I figure that prospective employers are the only people who would care enough to thoroughly investigate. In the header I only write 'Adventure BSN, CCRN, RNC-NIC,' but in my credentials section I write out 'CCRN-Neonatal.'