How to avoid duplicated rows?

Hi there ok so without data im just gonna wing it but i think what you need to do is;

create a measure on your date ie

last appointment = max(last apt)

then replace this  measure with the date on your matrix

change your other measures to 

change both your  

Allowed Units =
VAR maxdte =
MAX ( [last apt] )
RETURN
CALCULATE (
MAX ( MERGE_BillingSUMMARY[*C-Allowed] ),
FILTER ( 'table'[last apt], 'table'[last apt] = maxdte )
)

Applied Units =
VAR maxdte =
MAX ( [last apt] )
RETURN
CALCULATE (
SUM ( MERGE_BillingSUMMARY[Units] ),
FILTER (
MERGE_BillingSUMMARY,
MERGE_BillingSUMMARY[CPT Code]
IN {
"90791",
"90832",
"90834",
"90837",
"90839",
"90840",
"90846",
"90847",
"90853"
}
),
FILTER ( 'table'[last apt], 'table'[last apt] = maxdte )
)