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Last Modified: 7/18/2022 Location: FL, PR, USVI Business: Part A, Part B

Use current mailing addresses to prevent returned mail

In September 2020, First Coast transitioned our mailing P.O. Box addresses from Jacksonville, Florida, to Mechanicsburg, Pennsylvania. Starting in September 2021, we’re no longer forwarding mail received at the old addresses. Please ensure you are sending First Coast correspondence to the proper address.
Please visit the Contact Center page on our website for the current and correct mailing addresses. Mail received in the old Jacksonville P.O. Boxes will be returned.
Forms were also updated last year with the proper addresses. You should always download the most current forms from the First Coast website for accurate submission and mailing information.
Note: First Coast’s headquarters remain in Jacksonville. Mail services only were transitioned to Mechanicsburg.
The new mailing addresses that became effective in September 2020 included the following areas:

New address
Old address
JN Part A and B Medical Affairs and FOIA requests
P.O. Box 3425
Mechanicsburg, PA 17055-1825
P.O. Box 2078
Jacksonville, FL 32231
P.O. Box 45073
Jacksonville, FL 32232
P.O. Box 45092
Jacksonville, FL 32232
P.O. Box 45096
Jacksonville, FL 32232
JN Redeterminations, Inquiries, General Correspondence, Congressional FL Part A/B
P.O. Box 3411
Mechanicsburg, PA 17055-1850
P.O. Box 2360
Jacksonville, FL 32231
P.O. Box 45001
Jacksonville, FL 32232
P.O. Box 45020
Jacksonville, FL 32232
P.O. Box 45053
Jacksonville, FL 32232
P.O. Box 45270
Jacksonville, FL 32232
Part B Claims and Claims ADR FL
P.O. Box 2009
Mechanicsburg, PA 17055-0709
P.O. Box 2525
Jacksonville, FL 32203
P.O. Box 2537
Jacksonville, FL 32203
P.O. Box 44067
Jacksonville, FL 32231
P.O. Box 44071
Jacksonville, FL 32231
P.O. Box 44078
Jacksonville, FL 32231
P.O. Box 44099
Jacksonville, FL 32231
P.O. Box 44117
Jacksonville, FL 32231
P.O. Box 45031
Jacksonville, FL 32232
P.O. Box 45236
Jacksonville, FL 32232
P.O. Box 45263
Jacksonville, FL 32232
Part A Claims and Claims ADR FL
P.O. Box 2006
Mechanicsburg, PA 17055-0733
P.O. Box 2711
Jacksonville, FL 32231
JN Part B Florida Debt Recovery and Check Mail
P.O. Box 3092
Mechanicsburg, PA 17055-1810
P.O. Box 44094
Jacksonville, FL 32231
P.O. Box 44141
Jacksonville, FL 32231
P.O. Box 44179
Jacksonville, FL 32231
P.O. Box 44187
Jacksonville, FL 32231
Part A and Part B Post Pay Medical Review
P.O. Box 3701
Mechanicsburg, PA 17055-1860
P.O. Box 44159
Jacksonville, FL 32231
P.O. Box 44288
Jacksonville, FL 32231
Part A Claims and Claims ADR PR/VI
P.O. Box 2001
Mechanicsburg, PA 17055-0707
P.O. Box 45003
Jacksonville, FL 32232
P.O. Box 45071
Jacksonville, FL 32232
JN Part A Florida, Puerto Rico, and Virgin Islands Debt Recovery and Check Mail
P.O. Box 3162
Mechanicsburg, PA 17055-1837
P.O. Box 45011
Jacksonville, FL 32232
JN Part B Florida, Puerto Rico, and Virgin Islands Debt Recovery and Check Mail
P.O. Box 3121
Mechanicsburg, PA 17055-1831
P.O. Box 45013
Jacksonville, FL 32232
P.O. Box 45040
Jacksonville, FL 32232
JN Redeterminations, Inquiries, General Correspondence, Congressional PR/VI Part A/B
P.O. Box 3412
Mechanicsburg, PA 17055-1851
P.O. Box 45015
Jacksonville, FL 32232
P.O. Box 45024
Jacksonville, FL 32232
P.O. Box 45028
Jacksonville, FL 32232
P.O. Box 45056
Jacksonville, FL 32232
P.O. Box 45091
Jacksonville, FL 32232
P.O. Box 45097
Jacksonville, FL 32232
Part B Claims and Claims ADR PR/VI
P.O. Box 2004
Mechanicsburg, PA 17055-0704
P.O. Box 45036
Jacksonville, FL 32232
P.O. Box 45098
Jacksonville, FL 32232
JN Part A and B Complaint Processing Unit
P.O. Box 3419
Mechanicsburg, PA 17055-1859
P.O. Box 45087
Jacksonville, FL 32232
First Coast Service Options (First Coast) strives to ensure that the information available on our provider website is accurate, detailed, and current. Therefore, this is a dynamic site and its content changes daily. It is best to access the site to ensure you have the most current information rather than printing articles or forms that may become obsolete without notice.