It depends on your contracts with your payers. CMS pays midlevels at 85% of the physician allowable, and some payers will reimburse specialists differently. Smaller practices typically get paid based on an established fee schedule, but if you are a bigger facility,or associated with a PHO, sometimes you can use their clout to negotiate a better reimbursement.
If your software supports it, you should load your fee schedule, by payer, and by provider so that you can verify when you post payments that you are being paid correctly based on that payer and depending on who provided the service. Payers make mistakes, and if you're not aware of your contracted allowance, you could be writing off dollars that you are entitled to.