About the Practice

In 2007, Dr. Stanley Poulos and Dr. Yngvar Hvistendahl joined forces to see a shared dream become a reality with the opening of Plastic Surgery Specialists, now known simply as PSS. Confident in the philosophy that the sum is greater than its parts, when Dr. Trent Douglas joined the practice in January of 2020 it was immediately clear that the PSS team sum had grown exponentially. Dr. Poulos, Dr. Hvistendahl, and Dr. Douglas share a unique passion for plastic and reconstructive surgery and believe in a collaborative team approach that extends to the entire PSS staff.

PSS has grown over the years from two board-certified surgeons and a team of six to three board-certified surgeons and a team of 20. We are one of the most recognized and respected plastic surgery practices in Marin County and the greater San Francisco Bay Area. The addition of our very active medical spa on-site in our 6,000 square foot clinic allows us to provide nearly every surgical and non-surgical aesthetic option for our patients. Our team is dedicated to innovation and results and constantly adding new technologies in skin tightening, weight loss, women’s intimate health, hair restoration, injectables, and more.

We pride ourselves on providing safety and comfort without compromise and hold ourselves to the highest standards for surgical and non-surgical procedures. If you are considering surgical or non-surgical cosmetic procedures, we invite you to request a consultation online or call (415) 925-2880 to make an appointment with one of our board-certified plastic surgeons. People in all parts of Marin County and the San Francisco Bay Area travel to our Greenbrae clinic for the superior care we provide our patients.

Learn more about our practice, our surgeons, and our facility by using the links below:

About the Practice

Center of Excellence

  • Over 50,000 procedures performed
  • Over 75 years of combined experience

Our experienced team of board-certified plastic surgeons combines a unique aesthetic perspective, the ability to listen closely to your needs, and the skills to achieve those desires. This combination sets PSS apart as a world-class plastic surgery clinic, located in Marin County, CA.

Meet Dr. HvistendahlMeet Dr. DouglasMeet Dr. Poulos

Black Diamond

A Team Approach

Dr. Poulos, Dr.Hvistendahl, and Dr. Douglas collaborate and discuss cases daily. This team approach makes us better surgeons and ultimately brings the best possible experience for our patients allowing them to reap the benefits of our combined 75 years of knowledge. It’s rare to find this depth of knowledge at a single plastic surgery practice, and we’re proud to provide this specialized team approach, which is specifically beneficial for women undergoing a mommy makeover and patients choosing to combine multiple procedures in a single operation. 

Our team extends beyond our plastic surgeons to a staff of board-certified anesthesiologists, a nursing team with advanced cardiovascular life support training, and specialty-trained technicians who were hand-selected by our surgeons. We offer the latest technology and a stunning 6,000-square-foot facility that includes a state-of-the-art surgery center.


Our on-site medical spa, SpaPSS, supports our surgical practice by providing aesthetic, non-surgical treatments in a discreet and tranquil atmosphere. We offer a wide variety of injectable dermal fillers and Botox to maintain a youthful and confident look. We offer a full range of non-invasive body treatments as well including body contouring, skin tightening, skin resurfacing, laser hair removal treatments, and hair restoration. We take great pride in using the most advanced technologies for our patients including CoolSculpting, Emsculpt, the radio frequency-based Venus Legacy and Accent-Prime, Skin Tyte infrared laser, the state-of-the-art Halo Hybrid Fractional laser system, Venus Viva, Microchanneling with PRP, Soprano Ice hair removal laser, Hydrafacial® treatments as well as treatments for women’s intimate health.

We’ve also added the NeoGraft hair restoration system – a wonderful option for both men and women. NeoGraft produces dramatic natural results and permanent hair restoration without the need for a linear scar across the back of the scalp. When combined with a series of PRP treatments and our Nutrafol Vitamins, our patients see incredible results.

We’re also excited to assist patients working to lose significant weight (30-70 lbs) with the PSS Health & Wellness Weight Loss Program. This program combines a well-designed health and wellness plan with the technology of the Orbera®  Gastric Balloon. This treatment consists of inserting a saline-filled balloon endoscopically to occupy space in the stomach, preventing overeating and allowing for sustained weight loss while being supported by nutrition and exercise specialists.

Lastly, we offer convenient payment options to make either a big surgical procedure or regular maintenance affordable.

How to find our MedSpa

Plastic Surgery Specialists is known throughout the Bay Area for our excellence and expertise. Choose your area below to get accurate, easy-to-follow directions to our center.