Return nonblank value issues.

Hi Michael_DOC - you can modify the logic to filter out blank values in the FIRSTNONBLANK part of your measure. 

ceck the below measure:

Medical Score =
VAR ClosestRow =
CALCULATE (
FIRSTNONBLANK(
SCORES[SCOR_MEDICAL],
NOT (ISBLANK(SCORES[SCOR_MEDICAL])) // Exclude blank values
),
FILTER (
SCORES,
SCORES[SCOR_PER_ID] = PS[Number] &&
ABS(DATEDIFF(PS[OffenseDt], SCORES[SCOR_EFF_DATE], DAY)) =
MINX (
FILTER (
SCORES,
SCORES[SCOR_PER_ID] = PS[Number] &&
NOT (ISBLANK(SCORES[SCOR_MEDICAL])) // Exclude blank values in comparison
),
ABS(DATEDIFF(PS[OffenseDt], SCORES[SCOR_EFF_DATE], DAY))
)
)
)
RETURN
ClosestRow

Hope it works