In some patients, coronavirus (COVID-19) can cause symptoms that last weeks or even months after the infection has gone. Long COVID-19 was defined as a confirmed initial COVID-19 infection, the presence of signs and symptoms more than four weeks after initial infection, and the persistence or appearance of signs and symptoms that another condition cannot explain and did not exist before infection. This study aimed to describe the effect of adjunctive individualized homeopathic treatment delivered to Long COVID-19 patients with previously confirmed symptomatic SARS-CoV-2 infection. Fifteen female consecutive patients with Long COVID-19 were documented. The mean age was 48.5 ± 13.5 (SD) years. The symptoms of Long COVID-19 were diverse. None of the patients showed identical symptoms. All but one patient, hence 93.3%, experienced a timely improvement to complete healing after individualized homeopathic treatment, characterized by modified Naranjo criteria of at least 8 points. The average time until improvement/remission was 47.6 ± 34.6 days, and the median was 37 days. Our observations suggest that adjunctive individualized homeopathic treatment might be considered for patients suffering from Long COVID-19 even with severe long-term sequelae of COVID-19.