The Social Security Administration, the Centers for Medicare & Medicaid Services,
and State Medicaid certifying agencies must work together closely when de- certifying
Although decertification is prospective rather than retroactive, overpayments or underpayments
will occur if SSA delays decertification notifications and SSA does not adjust Supplemental
Security Income (SSI) payments (including federally administered State supplementary
payments) beginning with the month of decertification.