US · guidance
CMS Pub. 100-09, ch. 6, § 70.2.2
Timeliness of Responses to Written Provider Inquiries
Standards for responding timely to provider written inquiries (general, PRRS and Congressional) are
calculated using business days. See the chart below for assistance with converting calendar days to
business days. This chart is provided as a guide only and isn’t definitive. The chart assumes the MAC
was open for business every day during the reporting period. Days where the MAC is closed for
business shall not count as business days.
Business
Days
Calendar
Days
5 7
10 14
15 21
20 28
25 35
30 42
35 49
40 56
45 63
History
(Rev. 13683; Issued: 04-08-26; Effective: 05-08-26; Implementation: 05-08-26)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
805f63a3eae79aad071c0ef2a5e39ca538b328711096da6a4ded8031cca5adb2
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