The infection prevention and control activities during COVID-19 outbreak may affect every aspect in medical services, including medical rehabilitation. In geriatric patients, rehabilitation programs are essential to help in overcoming consequences of physical and cognitive impairments, and to prevent functional decline after hospitalisation. To protect both patients and healthcare professionals, direct contact through visits/ward round by HCPs will be reduced, and the rehabilitation programs will be emphasized on patient’s independence and/or caregiver competence. This study aims to evaluate the impact of service adjustment to functional capacity of the inpatient geriatric population in RSCM, Jakarta. This is a cross-sectional study. Data were taken through 45 medical records of geriatric patients who received inpatient care before pandemic (2016 to February 2020) and during pandemic (from March 2020). Functional ability was assessed by Barthel Index at hospital admission and discharge. From 23 geriatric patients who received inpatient care before pandemic, the mean difference of Barthel Index was 4.69. After pandemic, the mean difference of Barthel Index from 22 patients was 2.75. However, this is not statistically significant (p=0.074). There was no statistically significant difference in Barthel Index due to service adjustment in Medical Rehabilitation Department during COVID-19 era. There may be other factors contributing to patient’s recovery other than differences in health care services that are not analyzed in this study. Therefore, larger study is required to prove this beneficial effect.