can i change my apple id

If you apple ID ends in mac.com, me.com , or icloud.com you cannot change your Apple ID. If it ends with anything else you can change it.

http://support.apple.com/kb/ht5621

Apple ID: Changing your Apple ID

Learn how to change your Apple ID

Before you change your Apple ID:

• Sign out of all Apple features and services that you use with your current Apple ID.
• Make sure that the email address you want to use for your Apple ID meets these conditions:
  • The email address is one that you use regularly, because it will be the primary email address for your Apple ID.
  • The email address is not associated with any other Apple ID.
  • The email address is not an iCloud email address, which is already an Apple ID. iCloud email addresses end with @icloud.com, @me.com, or @mac.com.