Your client is a city. An employee injures his shoulder, goes on TTD, then moves to county; who is responsible for the 4850?

• A. The city
• B. The county
• C. New TPA no later than date of change
• D. The WCAB

Answer: (C)

When a public employee switches employers within a SIP framework, the ongoing workers’ comp claim follows the entity in control of the employee after the move. The new TPA must take over the administration of the claim and the 4850-related responsibilities by the date the change occurs. This ensures continuous, properly authorized temporary total disability benefits and seamless coordination of medical treatment, reporting, and payments. If the new TPA isn’t in place by the date of change, benefits can gap or become misrouted, complicating the claim and potentially delaying payments. So the responsible party for the 4850 is the new TPA, effective no later than the date of the change. The former entity retains responsibility only for periods before the move.