Association of Cost Sharing With Delayed and Complicated Presentation of Acute Appendicitis or Diverticulitis.

Importance: Treatment delays are associated with increased morbidity and cost of disease, although the extent to which cost sharing influences timely presentation and management of acute surgical disease remains unknown. Given recent policy changes using cost sharing to modify health care behavior, this study examines the association of cost sharing with the health of the patient at presentation and with receipt of optimal or minimally invasive surgery.

Objective: To assess whether cost sharing is associated with the likelihood of early, uncomplicated patient presentation or with surgical management of 2 representative emergency general surgery diagnoses: acute appendicitis and acute diverticulitis.

Medicaid professional fees for treatment of opioid use disorder varied widely across states and were substantially below fees paid by medicare in 2021.

Background: As Medicaid is the largest payer for opioid use disorder (OUD) treatment services in the United States, information about Medicaid provider reimbursement is critical, and Medicaid payment policies influence the structure of OUD treatment services for everyone with OUD treatment needs.

Methods: We collected Medicaid professional fees for OUD treatment and related services for the District of Columbia and fifty state Medicaid programs and the Medicare program in 2021. We create three fee indexes related to OUD treatment, with an emphasis on services related to first-line medication treatments in outpatient settings.

Medicaid Physician Fees Remained Substantially Below Fees Paid By Medicare In 2019.

In 2019, as in prior years, Medicaid physician fees remained well below Medicare and private insurance fees despite growth in Medicaid enrollment. Low Medicaid physician fees have important implications in terms of access to care for Medicaid enrollees and the effects of proposals to expand coverage through a Medicaid buy-in program or a Medicaid-like public option.

New evidence of state variation in Medicaid payment policies for dual Medicare-Medicaid enrollees.

Objective: To develop the first longitudinal database of state Medicaid policies for paying the cost sharing in Medicare Part B for services provided to dual Medicare-Medicaid enrollees ("duals") and an index summarizing the impact of these policies on payments for physician office services.

Data Sources: Medicaid policy data collected from electronic sources and inquiries with states.

Study Design: We constructed a national database of Medicaid payment policies for the period 2004-2018, consolidating information from online Medicaid policy documents, state laws, and policy data reported to us by state Medicaid programs.

Cluster expansion Monte Carlo study of indium-aluminum segregation and homogenization in CuInSe-CuAlSe pseudobinary alloys.

The influence of temperature and Al content on the segregation and homogenization behaviour of In-Al atoms in CuIn1-xAlxSe2 (CIAS) pseudobinary alloys is studied using a combination of cluster expansion Monte Carlo simulations and first-principles calculations. Such alloys are promising materials for a number of solar-energy-related applications. We found that the segregation of In-Al atoms in CIAS alloys with different Al contents occurs at relatively low temperatures.