Real-World Study of Foslevodopa/Foscarbidopa to Assess Quality of Life Outcomes in Adult Participants Earlier Within Advanced Parkinson Disease

* Eligibility for Foslevodopa/Foscarbidopa (LDp/CDp) therapy in accordance with approved local label in the participating country and local reimbursement regulations, if applicable * A diagnosis of levodopa-responsive idiopathic Parkinson's Disease (PD) * Adult male or female between 18 and 80 years of age * Disease duration (time since diagnosis) \<10 years * Time since motor fluctuations ≤3 years * H\&Y Stage \<3 in best "on" * "off" time of 2.5-6 hours per day * Naïve to LDp/CDp * Treatment has been optimized with oral/transdermal PD medication in the opinion of the Investigator * Decision to treat with LDp/CDp made by the clinician prior to any decision to approach the participant to participate in the study * Willing and able to comply with procedures required during this study, specifically with entering data and filling questionnaires in an electronic device (tablet). * Prior to any study-related procedures being performed, the participant or Legal Authorized Representative (LAR) must voluntarily sign an Authorization for Use/Disclosure of Data (AUDD)/Informed Consent Form (ICF) according to national regulations once the study has been explained and the participant has the opportunity to have any questions answered

* History of any condition included in the contraindications section of the approved local Foslevodopa/Foscarbidopa (LDp/CDp) label in the participating country * History of treatment with any Device-Aided Therapy (DAT), such as Deep Brain Stimulation (DBS), Continuous Subcutaneous Apomorphine Infusion (CSAI), Levodopa/Carbidopa Intestinal Gel (LCIG)/ Carbidopa/Levodopa Enteral Suspension (CLES), Levodopa/Entacapone/Carbidopa Intestinal Gel (LECIG) * Mini-Mental State Examination (MMSE) score \<24 * Participation in a concurrent investigational or observational clinical trial * Lack of motivation/insufficient language skills to complete the study questionnaires * History of significant skin conditions or disorders (e.g., psoriasis, atopic dermatitis). In case of temporary affections like recent sunburn or open wounds, or in case of permanent affections like acne, scar tissue, tattoo, branding, or colorations, the participant should not be included if the Investigator considers these as interfering with infusion of study drug or study assessments.