{"DID":"crit2eb32b","Sites":"DEX","Start Date":"06-01-2022 00:47","End Date":"06-30-2022 19:00","Content":"Attention: Please take a look at the Top News update for important information for Medicare Advantage Payors fourth wave.","URL":"https://www.dexzcodes.com/palmetto/dex.nsf/DID/07860YUDBI","Target":"_self","Color":"blue","Mode":"Standard\n","Priority":null}, {"DID":"crit3125a4","Sites":"DEX","Start Date":"08-29-2025 08:00","End Date":"09-01-2025 23:00","Content":"DEX Customer Service will be closed on September 1, 2025, in observance of Labor Day.","URL":"","Target":null,"Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"crit3ac124","Sites":"DEX","Start Date":"11-24-2025 08:00","End Date":"11-28-2025 23:00","Content":"DEX Customer Service will be closed on November 27 and 28, 2025, in observance of the Thanksgiving holiday.","URL":"","Target":null,"Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"crit43b55b","Sites":"DEX","Start Date":"01-16-2026 08:00","End Date":"01-19-2026 19:00","Content":"DEX Customer Service will be closed on January 19, 2026, in observance of Dr. Martin Luther King Jr. Day.","URL":"","Target":"_self","Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"crit4d4e3e","Sites":"DEX","Start Date":"07-02-2025 00:00","End Date":"07-04-2025 21:00","Content":"DEX Customer Service will be closed on July 4, 2025, in observance of Independence Day.","URL":"","Target":null,"Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"crit5d3bcc","Sites":"DEX","Start Date":"01-16-2025 14:53","End Date":"01-20-2025 17:30","Content":"DEX Customer Service will be closed on January 20, 2025, in observance of Martin Luther King Jr. Day.","URL":"","Target":null,"Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"crita5be51","Sites":"DEX","Start Date":"05-23-2025 07:00","End Date":"05-26-2025 18:00","Content":"DEX Customer Service will be closed on May 26, 2025, in observance of Memorial Day.","URL":"","Target":null,"Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"critadcaaa","Sites":"DEX","Start Date":"12-31-2025 11:19","End Date":"01-01-2026 21:21","Content":"DEX Customer Service will be closed on January 1, 2026, in observance of New Year's Day.","URL":"","Target":"_self","Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"critbc15cb","Sites":"DEX","Start Date":"05-24-2024 08:00","End Date":"05-27-2024 18:00","Content":"DEX Customer Service will be closed on May 27, 2024, in observance of Memorial Day.","URL":"","Target":null,"Color":"blue","Mode":"Standard\n","Priority":"no"}, {"DID":"critc242ce","Sites":"DEX","Start Date":"05-23-2025 08:00","End Date":"05-26-2025 17:30","Content":"DEX Customer Service will be closed on May 26, 2025, in observance of Memorial Day.","URL":"","Target":null,"Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"critcc2b25","Sites":"DEX","Start Date":"12-19-2025 08:00","End Date":"12-25-2025 23:00","Content":"DEX Customer Service will be closed on December 24 and 25, 2025, in observance of the Christmas holiday.","URL":"","Target":"_self","Color":"green","Mode":"Standard\n","Priority":"no"}, {"DID":"crite2be25","Sites":"DEX","Start Date":"08-23-2022 09:53","End Date":"08-29-2022 09:00","Content":"Palmetto GBA will be performing a system upgrade on the DEX (TM) Registry Thursday, August 25th at 5pm ET through Monday, August 29th at approximately 8am ET. For any questions, please contact DEX.customer.service@palmettogba.com","URL":"","Target":"_self","Color":"yellow","Mode":"Standard\n","Priority":"yes"}

Other Payers

Published 01/29/2026

The following payers participate in the DEX Z-Code® program and may require providers to submit a DEX Z-Code Identifier for Molecular Diagnostic Test Services on claims:

Medical Mutual of Ohio
Fallon Health
Blue Cross® and Blue Shield® of North Carolina
Community Health Plan of Washington
MVP® Health Care

Payer specific requirements may vary, refer to payer for details.

To view a list of all payers participating in the program, please see 1. Program Overview

Other Payers

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