(a) An adverse reimbursement determination is final and binding unless appealed pursuant to paragraph (e) of this section.
(b) Except as provided in paragraph (c) of this section, a sponsor may request an appeal of an adverse reimbursement determination.
(c) A sponsor may not appeal an adverse reimbursement determination if the denial is based on the unavailability of funds.
(d) An adverse reimbursement determination is a determination constituting a complete or partial denial of a reimbursement request.
(e) If a sponsor appeals an adverse reimbursement determination, the sponsor must submit the appeal in writing to the Secretary within 15 calendar days of receipt of the determination pursuant to guidance issued by the Secretary.