* 9 out of 10 physicians would discourage their children from becoming doctors.[3] There are many reasons for this. Malpractice insurance premiums are a factor. Not the only factor.
* California physicians have the lowest insurance premiums in the country. This is directly the result of tort reform, and caps on pain and suffering payouts. His survey of physicians he knows in the area is subject to this sampling bias. Malpractice is a big issue in other states.[0] California is the model for tort reform for this reason, by not acknowledging this fact, he's missing a big aspect of the national (not just Californian) issues regarding healthcare.
* California physicians also have some of the lowest reimbursement rates in the country.
* As he indicated, internal medicine docs pay far less in premiums (as he noted) than other specialties. Surgeons pay much higher premiums. [1]
* The California Department of Insurance does a good job of keeping most premium information public. It's not a secret what your average doctor pays in insurance.[2]
[0] : https://en.wikipedia.org/wiki/Medical_Injury_Compensation_Re...
[1] : http://cl.ly/image/0m390m1F2D2D
[2] : http://www.insurance.ca.gov/0250-insurers/0800-rate-filings/
[3] : http://www.thedoctors.com/ecm/groups/public/@tdc/@web/docume...