Two more Los Angeles skin specialists are getting their products into the big leagues of the retail game.

The Neiman Marcus chain has begun to stock lines by Stuart Kaplan and Kate Somerville. The former is a Beverly Hills-based dermatologist and founder of KaplanMD skin care; the latter is founder and chief executive of Kate Somerville skin care products in West Hollywood.

“We felt that we would have a broader reach to more people in the traditional retail locations,” Kaplan said.

They launched at Neiman Marcus in Beverly Hills this spring rather than Macy’s because of their price points, which are high.

Their treatment creams and moisturizers cost between $150 and $300, so buyers have to be willing to spend up to $500 on a home skin-care treatment set.

Both say the strategy is working.

“We are exceeding our sales goals,” Kaplan said.

Kate Somerville products are now available at 10 other Neiman Marcus stores. The products will be heading toward an additional 11 Neiman Marcus locations this fall. Kaplan is in discussions for expansion throughout the chain.

Neither company has an ad campaign, but celebrity customers help publicize them. Paris Hilton uses Somerville products, while Eva Longoria and Gwyneth Paltrow use Kaplan. That gets the products mentioned in magazines.

“We don’t advertise,” says Tracy O’Connor, vice president of communications at Kate Somerville. “Our products have been validated by celebrities and their makeup artists, and their skin has become our business card.”

The trend of marketing through retailers was kicked off a few years ago when Howard Murad, a Los Angeles-based dermatologist, took his Dr. Murad skin care line out of his clinic and launched it in the French beauty store chain Sephora and luxury hotel spas. Other doctor-brand products followed.

Kaplan and Somerville said that the most effective marketing for these products are in-store events.

“We found that our most loyal customers are people who have had a chance to try the products,” Kaplan said. “We believe in sampling in store and scheduling events such as complimentary signature facials.”