Public Welfare. Part158:Issuer use of premium revenue: reporting and rebate requirements. Section158.221:Formula for calculating an issuer's medical loss ratio.
(a) Medical loss ratio. (1) An issuer's MLR is the ratio of the numerator, as defined in paragraph (b) of this section,to the denominator, as defined in paragraph(c) of this section, subject to the applicable credibility adjustment, if any, as provided in §158.232 of this subpart.