MLN Matters Number: MM5905                                            Related Change Request (CR) #: 5905
Related CR Release Date: March 7, 2008                                 Effective Date: September 1, 2008
Related CR Transmittal #: R323OTN                                       Implementation Date: July 7, 2008

New Contractor Numbers for the State of California -Jurisdiction 1 Part B Medicare Administrative Contractor (MAC) Workload

Provider Types Affected
Physicians, providers, and suppliers billing Medicare carriers in the State of California transitioning to the Jurisdiction 1 Part A/B Medicare Administrative Contractor (A/B MAC) for services provided to Medicare beneficiaries.

Provider Action Needed
This article is based on Change Request (CR) 5905, which changes the contractor numbers for the State of California as this claims processing work transitions to Jurisdiction 1 Part A/B Medicare Administrative Contractor (MAC) Workload.

Background
Change Request (CR) 5905 notifies all interested parties that the Centers for Medicare & Medicaid Services (CMS) needs to change the contractor numbers in the Medicare Administrative Contractor (MAC) Jurisdiction 1 (J1) state of California when that state is transitioned to J1. This change needs to be made because certain applications require separate contractor numbers for each state. For example, providers using free billing software from the Medicare carrier may want to obtain updated versions of the software from the A/B MAC, once CR5904 is effective in order to have the correct contractor number in that software.

Claims for the state California will be processed by the J1 MAC using the contractor numbers and effective dates listed below.

Note: Wisconsin Physicians Services Ins. Corp. Medicare providers (formerly Mutual of Omaha) will continue to do business with Wisconsin Physicians Services Ins. Corp.

The following table reflects the change in numbers:

Additional Information
The official instruction, CR 5905, issued to your Medicare carrier and A/B MAC regarding this change may be viewed at http://www.cms.hhs.gov/Transmittals/downloads/R323OTN.pdf on the CMS Web site.

If you have any questions, please contact your Medicare carrier or A/B MAC at their toll-free number, which may be found at http://www.cms.hhs.gov/MLNProducts/downloads/CallCenterTollNumDirectory.zip on the CMS Web site.

Disclaimer This article was prepared as a service to the public and is not intended to grant rights or impose obligations. This article may contain references or links to statutes, regulations, or other policy materials. The information provided is only intended to be a general summary. It is not intended to take the place of either the written law or regulations. We encourage readers to review the specific statutes, regulations and other interpretive materials for a full and accurate statement of their contents.

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Posted: 03/31/2008