Expression of non-boolean type specified - tsql

Question

Can't figure out why this query won't run, because its saying I don't have a Boolean statement where one should be.
The error I'm getting says:
An error occurred while executing the query.
An expression of non-boolean type specified in a context where a condition is expected, near 'AND'. (Microsoft SQL Server Report Builder)
Server Name: xxxxxxxxxx
Error Number: 4145
Severity: 15
State: 1
Line Number: 9
SELECT
REF_TPI_NPI_PHYS.MNE,
REF_TPI_NPI_PHYS.REFERRING,
RPT_MK_PRACT_PHYS_PT_CNT.COUNT_PTS AS TOTAL_PTS,
Sum(IIf(HBA1C_DATE IS NOT NULL, 1, 0)) AS COUNT_HBA1C,
Format((Sum(IIf(HBA1C_DATE IS NOT NULL, 1, 0)) / ([RPT_MK_PRACT_PHYS_PT_CNT].COUNT_PTS)), 'Percent') AS PANELED_HBA1C,
Format(Sum(IIf(HBA1C_VALUE IS NOT NULL AND IsNumeric(CAST(HBA1C_VALUE AS FLOAT)) AND CAST(HBA1C_VALUE AS FLOAT) <= 100, 1, 0))) / Sum(IIf(HBA1C_DATE IS NOT NULL, 1, 0)), 'Percent') AS HBA1C_COMP
Sum(IIf(LDL_DATE IS NOT NULL, 1, 0)) AS COUNT_LDL,
Format((Sum(IIf(LDL_DATE IS NOT NULL, 1, 0)) / ([RPT_MK_PRACT_PHYS_PT_CNT].COUNT_PTS)), 'Percent') AS PANELED_LDL,
Format(Sum(IIf(LDL_VALUE IS NOT NULL AND IsNumeric(CAST(LDL_VALUE AS FLOAT)) AND CAST(LDL_VALUE AS FLOAT) <= 100, 1, 0))) / Sum(IIf(LDL_DATE IS NOT NULL, 1, 0)), 'Percent') AS LDL_COMP
FROM
(
(
TBL_HBA1C_LDL LEFT JOIN TBL_REGISTRATION
ON CAST(RTRIM(LTRIM(TBL_HBA1C_LDL.PAT_MRN)) AS INTEGER) = TBL_REGISTRATION.MRN
)
LEFT JOIN
REF_TPI_NPI_PHYS
ON TBL_REGISTRATION.PCP = REF_TPI_NPI_PHYS.REFERRING
)
LEFT JOIN
RPT_MK_PRACT_PHYS_PT_CNT
ON TBL_REGISTRATION.PCP = RPT_MK_PRACT_PHYS_PT_CNT.PCP
GROUP BY
REF_TPI_NPI_PHYS.MNE,
REF_TPI_NPI_PHYS.REFERRING,
RPT_MK_PRACT_PHYS_PT_CNT.COUNT_PTS
ORDER BY
REF_TPI_NPI_PHYS.MNE,
REF_TPI_NPI_PHYS.REFERRING