Why did ZAPP's operating expenses surge in Q4 2022?

Zapp's operating expenses surged in Q4 2022 due to several factors: 1. **Increased Physician Burnout and Turnover**: As mentioned in the lawsuit, there was a significant increase in operating expenses related to physician turnover. This increase could be attributed to the rising physician burnout rate, which led to higher costs associated with onboarding new physicians, despite their lower productivity compared to existing employees. 2. **Lifting of Lockdown Restrictions**: As lockdown restrictions were lifted, there was a decrease in the number of virtual visits, which flattened the Company's outpatient/virtual revenue growth. However, the increase in operating expenses was likely due to the rise in in-person visits, which required additional resources and infrastructure to support. In summary, Zapp's operating expenses surge in Q4 2022 was likely a result of increased physician turnover and burnout, and the lifting of lockdown restrictions that led to higher costs associated with onboarding new physicians and supporting increased in-person visits.