The Medicare claim payment amount.
For hospital services, this amount does not include the claim pass-through per diem payments made by Medicare. To obtain the total amount paid by Medicare for the claim, the pass-through amount (which is the daily per diem amount) must be multiplied by the number of Medicare-covered days (i.e., multiply the CLM_PASS_THRU_PER_DIEM_AMT by the CLM_UTLZTN_DAY_CNT), and then added to the claim payment amount (this field).
For non-hospital services (SNF, home health, hospice, and hospital outpatient) and for other non-institutional services (Carrier and DME), this variable equals the total actual Medicare payment amount, and pass-through amounts do not apply.
For Part B non-institutional services (Carrier and DME), this variable equals the sum of all the line item-level Medicare payments (variable called the LINE_NCH_PMT_AMT).
Medicare payments are described in detail in a series of Medicare Payment Advisory Commission (MedPAC) documents called “Payment Basics” (see: http://www.medpac.gov/payment_basics.cfm).
Also in the Medicare Learning Network (MLN) “Payment System Fact Sheet Series” (see: http://www.cms.gov/Outreach-and-Education/Medicare-Learning-NetworkMLN/MLNProducts/MLN-Publications.html).