An unnamed partner in Proskauer's Washington, D.C., office has sued the firm in federal court, alleging she is a victim of discrimination and claiming “substantial gender disparities” in the firm's partnership. The suit claims at least $50 million in damages.

Proskauer called the claims “groundless” and suggested that the partner sought to force a payout after her practice faltered.

The complaint was filed Friday in D.C. by lawyers at Sanford Heisler Sharp—which is also leading a high-profile gender bias lawsuit in New York on behalf of current and former female Chadbourne & Parke partners. Proskauer represents Chadbourne in that case.