Atopic deRMAtitis DiseAse registry of ADult and adolescent patients initiating or switching systemic treatments (ARMADA-AD) (ARMADA-AD)

Patients aged >=12 years at the time of consent

Confirmed diagnosis of AD, of any severity, according to the Investigators assessment as aligned with International Classification of Diseases 10th revision (ICD-10) code of L20

Prescribed and scheduled to initiate any systemic treatment for AD (including but not limited to biologics, oral JAK inhibitors, cyclosporine, azathioprine, methotrexate, mycophenolate mofetil)

Signed informed consent for registry participation by the patient or parent-legal representative and assent by the patient appropriate to the patients age, including willingness to participate in long-term follow-up

Concurrent participation in an interventional clinical trial that administers an investigational drug that modifies patient care

Insufficient understanding of the study by the patient and-or parent/guardian