Send your appeal here
Self-funded plan (federal rules)
This is a union health fund run by trustees. It pays claims from the fund's own money, so federal law (ERISA) applies, not state insurance law.
Your appeal
The fund office (Board of Trustees)
BOARD OF TRUSTEES OF MASON TENDERS DISTRICT COUNCIL WELFARE FUND
ATTN: BOARD OF TRUSTEES, APPEALS
520 EIGHTH AVENUE, SUITE 600
NEW YORK, NY 10018-4196
Union funds decide appeals through the trustees. If your denial letter gives a different appeal address, use that one.