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RTP reason code 34963 FAQ

February 18, 2026
Read this article to learn how to resolve claim rejects for reason code 34963.

Avoid the wait: submit electronically

February 18, 2026
Are you sending hardcopy mail to submit your requests to First Coast? Avoid the wait. There are faster and easier ways to send your requests to us. Learn about the electronic options available for you.

Responding to additional documentation requests (ADRs)

February 18, 2026
This article explains how to respond to ADRs.

Ambulance transport - multiple patients

February 18, 2026
Learn about Medicare’s billing and payment guidelines for ambulance transports of multiple patients.

Ending AX modifier requirements for acute kidney injury (AKI) and end stage renal disease (ESRD)

February 27, 2026
Effective July 1, 2026, new billing instructions apply related to no longer submitting the AX modifier and hemodiafiltration and AKI claims.

Medicare deductible and coinsurance

March 4, 2026
View annual deductibles and coinsurance for beneficiaries covered through the Medicare fee-for-service program.

COVID-19 vaccine and monoclonal antibody billing for Part A providers

March 6, 2026
This article will assist Medicare Part A providers with proper billing relating to COVID-19 vaccine and monoclonal antibody infusion. Beneficiary coinsurance and deductible are waived.

Tools & forms: Billing / coding

February 19, 2026
Use these self-service tools and forms related to billing and coding.

Availability of the list of essential medicines considered to be in shortage for the purposes of the recently finalized separate IPPS payment for establishing and maintaining access to essential medicines

February 18, 2026
In the fiscal year 2025 IPPS and LTCH final rule, CMS finalized a separate payment for establishing and maintaining access to essential Medicines. Read this article to learn more.

Immunization

February 20, 2026
See this article for additional resources for mass immunizers.
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