As hackneyed as this sounds, following this simple rule will address most, if not all, credentialing issues. And, in many instances, it is precisely the kind of behavior an MCO is trying to encourage. Many things fall under the rubric of practicing good medicine, including proper documentation and adherence to standards of care. When you do these things, the potential for an adverse decision is greatly diminished. The health plan's medical director is your ally.
Most doctors exhibit a visceral reaction when the medical director shows up.
From an idealistic perspective, medical directors serve an increasingly legitimate role in assuring quality care and keeping costs down. On the cynical side, they can make or break a practice by decredentialing the practice's physicians. Ask for help. This follows from the previous suggestion. If you sense that you have a problem with your practice that might pose a credentialing issue, call the plan's provider representative and ask for help.