Response Genetics (RGDX) 10-K 2012 FY Annual report

EXHIBIT 23

Consent of Independent Registered Public Accounting Firm

Response Genetics, Inc.

Los Angeles, California

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-159296, No. 333-159297, No. 333-162591, No. 333-166163, No. 333-171266, No. 333-181045 and No. 333-184614) and Form S-8 (No. 333-154307 and No. 333-167954) of Response Genetics, Inc. of our report dated March 26, 2013, relating to the consolidated financial statements and financial statement schedule, which appear in this Form 10-K.

/s/ BDO USA, LLP

BDO USA, LLP

Los Angeles, California

March 26, 2013