PrimeraDx Inc. drummed up another hefty chunk of change, raising $20 million in a Series C round from new and existing investors.

The Marlborough, Mass.-based molecular diagnostics maker said a new backer, CHL Medical Partners, led the round and was joined by previous backers including Abingworth, InterWest Partners, Malaysian Technology Development Corp., MPM Capital, Burrill & Co. and the Invus Group.

President and CEO Martin Verhoef said the company will use the cash to help commecialize its technology and broaden the assay menu for its IcePlex system.

Earlier this month, the company added $1 million from a debt offering to the $21 million it raised in a Series B round in early 2008.