Authorities Cited: United States Code 42 U.S.C. § 25 42 U.S.C. § 401 42 U.S.C. § 405(g) 42 U.S.C. § 423(d)(1)(A) Code of Federal Regulations 6 C.F.R. § 404.1527(d)(2) 20 C.F.R. § 22 20 C.F.R. § 404.1527(d)(2) 25 C.F.R. § 404.1567 Supreme Court 402 U.S. 389, 401 Circuit Courts 721 F.2d 414, 419 59 F.3d 307, 314 134 F.3d 496, 505 142 F.3d 75, 81 168 F.3d 72, 79 177 F.3d 128, 133 198 F.3d 45, 51-52 209 F.3d 117, 123 221 F.3d 24 311 F.3d 468, 472 312 F.3d 578, 588 335 F.3d 99, 106-108 362 F.3d 28, 31-33 388 F.3d 377, 383