The Maas Clinic

San Francisco, California FUE, FUT, NeoGraft

Surgeon verified

Hair transplant rules in the USA

Surgeon Verified

Checked against US State Medical Board, August 2026.

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About the Clinic

The Maas Clinic offers advanced hair restoration solutions for both men and women experiencing hair loss. Utilizing modern techniques like micrografting, the clinic aims to provide natural and long-lasting results with minimally invasive procedures. They specialize in follicular unit extraction (FUE) and follicular unit transplantation (FUT), carefully transplanting individual hair follicles from donor areas to thinning or balding regions of the scalp. The Maas Clinic also offers complementary treatments such as Propecia and Platelet-Rich Plasma (PRP) therapy to enhance hair growth and support transplant results.

Patients seeking hair restoration at The Maas Clinic can expect a personalized approach, with the clinic focusing on meeting each individual's specific needs and aesthetic goals. The clinic employs sophisticated tools, including microscopes for precise graft preparation, ensuring that finer hairs are used along the frontal hairline for a natural appearance, while thicker hairs are placed in other areas. They also provide consultations to discuss hair loss concerns and develop tailored treatment plans. A portfolio of before-and-after photos and client testimonials are available to showcase the clinic's capabilities.

Reviews for The Maas Clinic indicate a high level of patient satisfaction, with many praising Dr. Corey S. Maas and his team for their skill, attention to detail, and compassionate care. Patients frequently mention feeling comfortable and well-informed throughout their treatment journey. Many express delight with the natural-looking results and the positive impact on their confidence. While some early experiences mentioned long wait times, the overall sentiment highlights the clinic's commitment to achieving excellent outcomes and providing a positive patient experience.

Meet the Surgeon

Surgeon Verified

An independent professional body or licensing authority has verified at least one surgeon practicing under this clinic's name.

The surgeon profiled here has verified credentials.

Checked against US State Medical Board, August 7, 2026.

Dr. Corey Maas

STATE LICENSE Verified via NPPES record G71163 verify on the issuing register (opens in a new tab)

Dr. Corey Maas is a highly experienced and board-certified facial plastic surgeon. He earned his Bachelor of Science in Biology from Florida State University and his Medical Doctor degree with honors from the University of Florida College of Medicine. His postgraduate training included a General Surgery Internship and a Residency in Otolaryngology-Head and Neck Surgery at St. Louis University Medical Center, followed by a Fellowship in Facial Plastic and Reconstructive Surgery at the University of California, San Francisco (UCSF). Dr. Maas served as the Chief of the Division of Facial Plastic and Reconstructive Surgery at UCSF for over 11 years before founding The Maas Clinic. He is a Fellow of several prestigious organizations, including the American Academy of Facial Plastic and Reconstructive Surgery, the American Academy of Otolaryngology-Head and Neck Surgery, and the American College of Surgeons. Among his many accomplishments, Dr. Maas has received the Sir Harold Delf Gilles Award from the American Academy of Facial Plastic and Reconstructive Surgery and has been recognized with Readers' Choice Awards for Best Cosmetic Surgeon. He has also authored over 150 articles and book chapters and is an Associate Clinical Professor at UCSF, dedicating time to educating future surgeons.

Procedures Offered

FUE
FUE (Follicular Unit Extraction) is a minimally invasive hair transplant technique where individual hair follicles are extracted one by one from the donor area using a small circular punch tool. The harvested follicles are then carefully implanted into the balding or thinning areas of the scalp. This method leaves tiny, nearly invisible scars rather than a linear scar, resulting in faster healing and the ability to wear shorter hairstyles. Because of this, FUE is the most popular hair transplant technique today.
FUT
FUT (Follicular Unit Transplantation), also known as the "strip method," involves surgically removing a narrow strip of scalp from the donor area, typically the back of the head. The strip is then carefully dissected under a microscope to separate individual hair follicles, which are implanted into the recipient areas. While this technique leaves a linear scar that requires longer hair to conceal, it allows surgeons to harvest a large number of high-quality grafts in a single session, making it cost-effective for patients needing extensive coverage.
NeoGraft
NeoGraft is an automated hair transplant device that streamlines the FUE process using pneumatic technology to maintain consistent suction and speed up the harvesting process while still requiring the surgeon's skill and judgment for follicle selection and placement. The system works as an extension of the surgeon's technique to extract and implant individual hair follicles more efficiently than fully manual methods. NeoGraft can reduce procedure time and potentially improve graft survival rates. It represents a middle ground between manual FUE and completely robotic systems.

Contact Info

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Hair transplant safety in the USA
RulesModerate
EnforcementModerate

The USA has general medical rules that cover hair transplants, and checking is about average.

You can look your doctor up yourself on the government’s official list of licensed doctors. It is free to search. Search it here (opens the government register in a new tab)

What the rules are in the USA