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Last Modified: 4/3/2019 Location: FL, PR, USVI Business: Part A, Part B

Contractor numbers for processing Medicare administrative contractor workload

The Centers for Medicare & Medicaid Services (CMS) issues workload numbers to replace the carrier and fiscal intermediary contractor numbers for the Medicare administrative contractor (MAC) Part A and Part B workloads in the state of Florida and the territories of Puerto Rico and the U.S. Virgin Islands. These changes were made because certain CMS claim systems rely on these numbers for processing purposes. Some provider systems may also rely on these numbers.
Part A and Part B claims for Florida, Puerto Rico, and the U.S. Virgin Islands are processed by First Coast Service Options Inc. (First Coast) using the contractor numbers and effective dates listed below:

Part A workload

MAC Workload No.
Effective Date
Puerto Rico/U.S Virgin Islands

Part B workload

MAC Workload No.
Effective Date
Puerto Rico
U.S Virgin Islands
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