Pacific Mercantile Bancorp (PMBC) 8-K Changes in Registrant's Certifying Accountant

16.1

April 2, 2014

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Ladies and Gentlemen:

We have read Item 4.01 of Form 8-K dated April 2, 2014, of Pacific Mercantile Bancorp and are in agreement with the statements contained in section (a) therein. We have no basis to agree or disagree with other statements of the registrant contained therein.

/s/ SQUAR, MILNER, PETERSON, MIRANDA & WILLIAMSON, LLP