The information requested is not readily available and to provide it would incur disproportionate cost. Information for initial disallowance decisions following a PIP assessment, including the number where the award was changed after a Mandatory Reconsideration (MR) or appeal is published as part of Personal Independence Payment: Official Statistics to October 2019, in Table 5c of Data tables: “PIP award rates, clearance/outstanding times and tracking of initial decisions following a PIP assessment through to mandatory reconsiderations or appeals, to October 2019”. https://www.gov.uk/government/statistics/personal-independence-payment-april-2013-to-october-2019