The office of Inspector General (OIG) has released its "2011 Workplan". In other words, these areas of compliance are going to be targeted for audit (and fined accordingly, I'm sure).
The areas of specific focus for physicians / medical practices are:
Place of Service Errors
Ambulatory Surgical Center Payment System
Coding of Evaluation and Management Services
Payments for Evaluation and Management Services
Evaluation and Management Services During Global Surgery Periods
Medicare Payments for Part B Imaging Services
Billing of Portable X-Ray Supplies
Outpatient Physical Therapy Services Provided by Independent Therapists
Questionable Billing for Medicare Outpatient Therapy Services
Appropriateness of Medicare Payments for Polysomnography
Medicare Payments for Sleep Testing
Excessive Payments for Diagnostic Tests
Medicare Part B Payments for Glycated Hemoglobin A1C Tests
Trends in Laboratory Utilization
Geographic Areas with a High Density of Independent Diagnostic Testing Facilities
Independent Diagnostic Testing Facilities' Compliance with Medicare Standards
Medicare Providers' Compliance with Assignment Rules
Medicare Payments for Claims Deemed Not Reasonable and Necessary
Medicare Billings with Modifier GY
Payments for Services Ordered or Referred by Excluded Providers
Payments for ESRD Beneficiaries Entitled to Medicare Under Special Provisions