US · guidance
CMS Pub. 100-09, ch. 2, § 20.2
Complex Beneficiary Inquiries
Although MACs may receive beneficiary inquiries (letters, faxes, e-mails, and, rarely,
telephone calls) through a number of portals, under the current design, the MACs are
responsible for responding only to the complex beneficiary inquiries that are referred to
them by the (BCC) or the CMS ROs. If MACs receive beneficiary inquiries that are of a
general nature, such as, specific billing questions and questions about claims, medical
records, or expenses. MACs shall refer the inquiring beneficiaries to the BCC at 1-800-
MEDICARE, or TTY # 1-877-486-2048. MACs may also provide the beneficiaries with
the address to which they may send correspondence: Centers for Medicare & Medicaid
Services, P.O. Box 39 Lawrence, KS 66046.
History
(Rev. 33, Issued: 10-02-15, Effective: 11-02-15, Implementation: 11-02-15)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
017c37b2028b39e46483fcd795f178f1714c410adc2523ba31b3504d1d722faf
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