US · guidance
CMS Pub. 100-06, ch. 4, § 30
Interest Assessment/Payment on Overpayments and Underpayments
The CMS regulations, in accordance with the Federal Claims Collection Act, as amended, the Social
Security Act, and common law establish specific rules for the payment of interest on Medicare
overpayments and underpayments (42 CFR 405.378). As a general rule, interest shall be assessed at the
prevailing rate specified by the Secretary of the Treasury unless the overpayment is recouped or the
underpayment is paid within 30 days of a "final determination."
Interest shall be assessed on overpayments, and shall be paid on underpayments, to providers and suppliers
of services (including physicians and other practitioners), if the overpayment or the underpayment is not
liquidated within 30 days from the date of the final determination.
The provisions of this section may not apply to FI overpayments or underpayments determined as a result of
interim rate and periodic interim payment (PIP) adjustments (See Chapter 3, §60) or utilization reviews.
The basic rules for assessing interest are:
History
(Rev. 29, 01-02-04)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
bfda7cb9526ecec1fb9ca1dc8c8b1796ae91b4f83983b8653ee903ef242a9e6f
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