Supreme Court Ethics, Recusal, and Transparency Act of 2023 This bill makes various changes related to the ethical standards, financial disclosure requirements, and recusal requirements that apply to Supreme Court Justices. Among the changes, the bill requires the Supreme Court to adopt a code of conduct for Justices and establish procedures to receive and investigate complaints of judicial misconduct; adopt rules governing the disclosure of gifts, travel, and income received by the Justices and law clerks that are at least as rigorous as the House and Senate disclosure rules; and establish procedural rules requiring each party or amicus to disclose any gift, income, or reimbursement provided to Justices. Additionally, the bill expands the circumstances under which a Justice or judge must be disqualified; and requires the Supreme Court and the Judicial Conference to establish procedural rules for prohibiting the filing of or striking an amicus brief that would result in the disqualification of a Justice, judge, or magistrate judge.