Summarize Function

91asma2 

Of course you're getting BLANKS. That's obvious when you look at your measure and think for a sec. You're trying to filter AssesmentID's using the [Disorders Ct] measure. It's obvious that for any one particular assessment the measure will return either 0 or 1. So the filter removes all assessments.

You should not have changed the measure OwenAuger gave you because if you want to count the USERS where [Disorders Ct] > 1, then it makes no sense whatsoever to filter assessments by the mentioned measure.

By the way, one more way to write the measure is this:

Disorders Ct =
var Score_ = 
    SELECTCOLUMNS(
        {1},
        "@Score", [Value]
    )
var Category_ = {
        "ADDICTION",
        "ADHD",
        "APNEA",
        " DEPRESSION",
        "GEN_ANX",
        "PTSD",
        "SOC_ANX"
    }
var Filter_ =
    CROSSJOIN(
        Score_,
        Category_
    )
var Result =
    CALCULATE(
        DISTINCTCOUNT( Assessment[assessment_id] ),
        // If you want to obey any filters that are
        // already present on either [Assses Score]
        // or [Assess Category] you have to wrap
        // the TREATAS in KEEPFILTERS. If in doubt,
        // just use this measure first and then the
        // version with:
        //
        //KEEPFILTERS(
        //    TREATAS(
        //        Filter_,
        //        Assessment[Assess Score],
        //        Assessment[Assess Category]
        //    )
        //)
        //
        // KEEPFILTERS enables you to join filters
        // in the measure and coming from outside
        // in an AND operation instead of overwriting
        // which is the usual semantics of filters in
        // CALCULATE.
        TREATAS(
            Filter_,
            Assessment[Assess Score],
            Assessment[Assess Category]
        )
    )
return
    Result