DSH: Disproportionate Share Hospital Payments
DSH payments are federal adjustments to hospitals that serve a disproportionate share of low-income, Medicaid, and Medicare/Medicaid dual-eligible patients. Includes Medicare DSH, Medicaid DSH, and ACA uncompensated care pool payments.
The three DSH categories
Disproportionate Share Hospital payments come from three distinct programs:
- Medicare DSH — Section 1886(d)(5)(F) adjustment to inpatient prospective payment based on the hospital's DSH percentage (sum of Medicare SSI percentage and Medicaid percentage).
- Medicaid DSH — state-administered payments funded through federal allotments. Each state has a DSH allotment cap and operates its own distribution methodology.
- ACA Uncompensated Care DSH — implemented in 2014, redistributes a portion of Medicare DSH dollars based on uncompensated care volume.
Medicare DSH calculation
The Medicare DSH percentage is calculated as the sum of:
- Medicare SSI percentage: Medicare patient days for SSI-eligible patients / total Medicare patient days.
- Medicaid percentage: Medicaid patient days (regardless of Medicare entitlement) / total patient days.
A hospital with DSH percentage above 15% receives a Medicare DSH payment add-on calculated through a complex formula (different for urban vs rural). Below 15%, no add-on. The threshold creates significant financial cliff effects.
Why DSH analytics matters
DSH payments commonly account for 5-15% of total Medicare reimbursement at safety net hospitals. Errors in patient-day classification or payer-mix data flow directly to DSH payment errors that are caught in cost report audits — often years later, with recoupment and interest. Continuous DSH eligibility monitoring is far cheaper than annual cost report reconstruction.
Where Vizier fits
Vizier reads inpatient encounter data and patient eligibility data via the EHR connector and tracks Medicare SSI percentage, Medicaid percentage, and the rolling DSH percentage continuously. Modeled DSH payment projections refresh monthly. Cost report prep moves from a 6-week annual project to a one-week verification.