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Economic evaluation of inpatient medication reconciliation with a subtraction strategy

Author

Listed:
  • Nontakorn Khomsanoi

    (Suranaree University of Technology Hospital)

  • Theetad Chombandit

    (Bangkok Pattaya Hospital)

  • Jurinporn Wiwatmanaskul

    (Suranaree University of Technology Hospital)

  • Chatchai Kreepala

    (Suranaree University of Technology)

Abstract

Background University-based hospitals in Thailand face increasing financial strain due to insufficient reimbursement for inpatient care. The public health financing system comprises three major schemes: the Universal Coverage Scheme (UCS), Social Security Scheme (SSS), and Civil Servant Medical Benefit Scheme (CSMBS), which differ in funding mechanisms and reimbursement rates. Although all schemes apply the Diagnosis-Related Groups (DRG) system for inpatient payment, variations in base rates and case-mix complexity often leave tertiary hospitals underfunded. Medication reconciliation (MR) with a subtraction strategy—deducting patients’ home medications from discharge prescriptions—has been implemented to optimize hospital resources. This study aimed to evaluate cost savings and identify key determinants influencing the economic outcomes of MR across public insurance schemes. Methods We conducted a retrospective cohort study of 563 hospitalized internal medicine patients at a university-based hospital. Of these, 324 underwent MR with subtraction. Cost savings and reimbursement margins were calculated from the provider’s perspective. Patients were stratified by healthcare scheme (CSMBS, UCS, SSS) and length of stay (LOS). Generalized Linear Mixed Models were used to identify factors associated with cost savings. Results The highest mean cost savings per patient were observed in the SSS group (508.5 ± 56.1 THB [~ 14.1 USD]), and the lowest in CSMBS (133.5 ± 23.6 THB [~ 3.7 USD]). Prolonged LOS was associated with significantly greater savings (LOS > 21 days: IRR = 2.45, p

Suggested Citation

  • Nontakorn Khomsanoi & Theetad Chombandit & Jurinporn Wiwatmanaskul & Chatchai Kreepala, 2025. "Economic evaluation of inpatient medication reconciliation with a subtraction strategy," Health Economics Review, Springer, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:spr:hecrev:v:15:y:2025:i:1:d:10.1186_s13561-025-00649-0
    DOI: 10.1186/s13561-025-00649-0
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