Help with Power Pivot DAX Measures

Darren Anderson 20 Reputation points

Good morning.

I am in the process of converting a straight up Excel workbook that I inherited to a Data Model within Excel (our client does not use PowerBI, unfortunately). There are a couple of formulas that essentially evaluate the data and calculate an expected reimbursement value that a) evaluates for duplicate/multiple entries and essentially calculates a single expected reimbursement (e.g. an account with 4 entries sums all the hard-coded expected reimbursements and divides that sum by the number of duplicates and produces a "new" expected reimbursement). I can absolutely add those columns in the Power Query from the raw data (adding the per-row reduced output so that it totals up correctly), but my understanding is that it "makes more sense" to leverage DAX in Power Pivot to get to those results.

I wrote a measure to do this and everything checks out when I put the data output into a Pivot Table with the Account Number as the row. But, the amounts do not total up at the bottom of the table.

Here are the Excel Formulas that I want to make DAX Measures to use in my data model.

Formula to count instances of the account number in the data (checks for the instances of the HSP_ACCOUNT_ID where the PRIM_PAYOR and FY all match):

Excel Column/Table Column: [Duplicates]


I was able to create a DAX Measure that does this (modified it from one I found on the web, actually):

Status Change Duplicate HSP_ACCOUNT Count=

var current_row_Hosp_ID = min(
var current_row_Prim_Payor = min(
var current_row_FY=min(


			'Status Change'[HSP_ACCOUNT_ID]

This measure comes up with the correct answers and matches the [Duplicates] table column, but it does not "total" at the end when I put into the Data Model Pivot Table

The two additional Excel formulas that I want to convert to DAX are as follows (I plan to change the names to something easier to use...):

[Current Expected Reimbursement - Duplicates]


[Original Expected Reimbursement - Duplicates]


[Lost Revenue]

=IF([@[ORIG_EXP_REIM]] ="NULL", 0,IFERROR([@[Current expected Reimbursement - duplicates]]-[@[Original expected reimbursement - duplicates]],0))

I took a shot at converting the [Current Expected Reimbursement - Duplicates] conversion to DAX and keep running into calculation errors. My attempt that keeps erroring:

Current Expected Reimbursement - Duplicates =
 		'Status Change'[CURR_EXP_REIM],
 		[Status Change Duplicate HSP_ACCOUNT_ID Count],

Error Message: Calculation error in measure 'Measures Table'[Current Expected Reimbursement - Duplicates]: A single value for column 'CURR_EXP_REIM' in table 'Status Change' cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single result.

I feel like I am missing a very basic step, so any assistance would be appreciated.

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Accepted answer
  1. Jiajing Hua-MFST 6,745 Reputation points Microsoft Vendor


    I suggest you post a new thread in:

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