Introduction: The demand for complementary medicine (CM) is well studied in the outpatient sector, but representative data on type and extent of inpatient care using CM are missing. Therefore, our aim was to examine the range of CM treatments offered and the types of indications for using CM in acute care hospitals in the German state of Bavaria. Methods: We conducted a cross-sectional questionnaire survey by contacting the medical heads of all 388 Bavarian acute care hospitals between November 2020 and April 2021. The questionnaire included a wide range of CM to assessed availability of CM supply, most frequent indications, and medical specialities. Furthermore, we assessed basic information about the hospital and the participating medical staff. Results: A total of 101 (26%) hospitals participated in the survey. At least one CM treatment was offered by 92% of the responding hospitals and 75% offered at least 5 therapy modalities (mean of 10 treatments, range: 0–25). These were most commonly massage therapies (68%), relaxation techniques (63%), phytotherapy (60%), mindfulness-based treatments (53%), art, diet, and exercise therapies (each 48%), aromatherapy (46%), acupuncture, and compresses/poultices (both 42%). The most reported medical conditions for CM treatments (in descending order) were chronic pain, mental disorders, degenerative affections, sleep disorders, fatigue syndrome, functional gastrointestinal disorders, and acute pain. Conclusion: According to the Bavarian acute care hospitals that participated in our postal survey, a considerable part offered CM. Further research should include personal interviews and more detailed assessments of indications and attitudes for the use of CM in acute care hospital settings.