CMS releases April update to average sales price (ASP) Medicare Part B drug pricing files On February 20, CMS issued its quarterly update to the ASP drug pricing files for Part B drugs not paid on a cost or prospective payment basis. Effective date: April 1, 2009 Implementation date: April 6, 2009 View the transmittal. CMS announces HCPCS codes subject to and excluded from CLIA edits On February 20, CMS released a transmittal informing its contractors of the new HCPCS codes, including modifiers, for 2009 that are both subject to CLIA edits and excluded from CLIA edits. Effective date: January 1, 2009 Implementation date: April 6, 2009 View the transmittal. CMS updates model letters On February 20, CMS issued a transmittal updating the model letters under the Medicare Program Integrity Manual. Effective date: March 20, 2009 Implementation date: March 20, 2009 View the transmittal. CMS releases MLN Matters articles CMS released several MLN Matters articles last week related to transmittals previously covered in Medicare Weekly Update.

• Payments to Institutional Providers with Multiple Service Delivery Locations
• Corrections to the Inpatient Prospective Payment System Wage Index for Fiscal Year (FY) 2009
• Clarification on Use of National Drug Codes (NDCs) in 837 I Billing
• Changes to the Laboratory National Coverage Determination (NCD) Edit Software for April 2009