Exhibit 23.3

CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use in this Registration Statement on Form S-1 of Omeros Corporation of our report dated December 2, 2005 relating to the financial statements of nura, inc., which appears in such Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

Seattle, Washington
January 8, 2008