Is a physician's assistant considered a "acceptable medical source" for medical malpractice claims?

^5. Prior to March 2017, physicians' assistants were not classified as an "acceptable medical source." See 20 C.F.R. 404.1502(a)(8) (including licensed physicians' assistants as acceptable medical sources for impairments within their licensed scope of practice "only with respect to claims filed ... on or after March 27, 2017"). Instead, physicians' assistants were defined as "other sources" not entitled to the same deference as an "acceptable medical source." Molina v. Astrue, 674 F.3d 1104, 1111 (9th Cir. 2012).