Depends. The largest companies often self-insure, where they pay the insurance companies a fixed rate for administration, but the costs of the actual health care come out of the company budget.

It's quite close, it's probably over $17,000 for 2018:

https://kaiserfamilyfoundation.files.wordpress.com/2016/02/8...

Overall US healthcare spending is ~$10k per person, so it is probably at least in the ballpark.