Don't rely on MCOs--take systems approach to physician practice data collection.
Physician practices can thrive under capitation with proper data collection. Practices should take a systems approach to managing the financial, operations, and clinical aspects of their businesses--and this requires data. While some of it may be acquired from MCOs, most physicians will have to rely on IPAs or PHOs to do the dirty work. Here's a laundry list of data to collect, plus report templates.
D003625:Data Collection; D004608:Eligibility Determination; D007344:Insurance Claim Reporting; D008329:Managed Care Programs / Q000458:organization & administration*; D011216:Practice Management, Medical / Q000458:organization & administration; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D011787:Quality of Health Care; D013597:Systems Analysis; D014481:United States