Dedicated to Quality Patient Care
The Maas Clinic is internationally recognized for its expertise and nuanced, transformative results in surgical and non-surgical procedures.
explore before & after galleryLooking Your Best
Face, Body, Plastic & Aesthetic Surgery in San Francisco
Be your best & most beautiful self.
Combining art & science for a result that is naturally beautiful–and beautifully you.
World-Renowned Excellence
Board-certified by the American Board of Facial Plastic & Reconstructive Surgery as well as the American Board of Otolaryngology-Head & Neck Surgery, San Francisco plastic surgeon Corey S. Maas MDTM is one of the most highly regarded and sought-after facial plastic surgeons in the world. Dr. Maas is regularly featured in newspapers, television broadcasts, and magazines, from San Francisco Medicine and Cosmetic Surgery Times to Vogue and Allure.
Education & Background
After years of studying at prestigious medical institutions, Dr. Maas completed his fellowship in Facial Plastic and Reconstructive Surgery at the University of California, San Francisco. His skill and dedication to the craft eventually led him to serve at UCSF as the Chief of the Division of Facial Plastic and Reconstructive Surgery for over a decade.
Leader & Medical Director
Dr. Maas was honored to serve as President of the American Academy of Facial Plastic and Reconstructive Surgery (AAFPRS) & California Society of Facial Plastic Surgery (CSFPS). Dr. Maas founded The Maas Clinic for Aesthetic and Facial Plastic Surgery, The Research Center at The Maas Clinic, and is the Medical Director of The Appearance Care Center, a state-of-the-art medical day spa with the latest in technology and a skilled nursing staff. His luxury facilities are known for high-end care, privacy, and patient satisfaction.
Research & Fellowship Director
Dr. Maas doesn’t just practice facial plastic surgery and aesthetics—he is pushing boundaries and expanding our understanding of the field through training programs, profound studies and industry-leading clinical research. For over 20 years, Dr. Maas has been a fellowship director for The Fellowship Program under the auspices of the Educational and Research Foundation for the American Academy of Facial Plastic and Reconstructive Surgery.
Meet Dr. Rajaie Hazboun
Dr. Rajaie Hazboun is a plastic surgeon at The Maas Clinic, specializing in breast, body, and facial procedures. He tailors treatment plans to each patient’s goals, fostering lasting relationships built on trust and support.
His expertise spans cosmetic and reconstructive surgeries, including breast augmentation, breast lift, tummy tuck, liposuction, facelift, rhinoplasty, and Mohs reconstruction. Committed to innovation, he refines his techniques to deliver advanced, effective care. At The Maas Clinic, Dr. Hazboun helps patients restore confidence with expertise, compassion, and personalized procedure plans.
Dr. Rajaie Hazboun
Expertise in Face, Breast, and Body Cosmetic Surgery
Face Procedures
Discover transformative facial procedures at The Maas Clinic, where Dr. Corey S. Maas specializes in enhancing your natural beauty. Our comprehensive options include facelifts, rhinoplasty, eyelid surgery, brow and neck lifts. With precision and artistry, Dr. Maas delivers exceptional results, not altering your beauty but emphasizing your unique features. Elevate your facial aesthetics on a journey towards renewed confidence and timeless beauty with our expertly crafted procedures.
View All Face Procedures
“The most rewarding part of my job is providing results that give my patients the confidence to feel like the best versions of themselves.”
— Dr. Corey S. Maas
His attention to excellence and details is evident in the outstanding results of his work.
Dr Maas has extensive knowledge, experience and expertise in the field of plastic surgery. His attention to excellence and details is evident in the outstanding results of his work. I trusted him with my face and am 100% satisfied with the results of his work and attention to details. Dr Maas demonstrates his humanity in the care and attention he pays to his patients as I find him to consistently put the interests and welfare of his patients first.
I absolutely love Dr Maas!
I absolutely love Dr Maas! He cares deeply about his clients and is the ultimate professional with fine attention to detail! So happy I discovered Dr Maas and his clinic—I’ll be a lifer!
I would recommend Dr. Maas to anyone who is looking for great care.
I’ve been seeing Dr. Maas for over 15 years; one of the most skilled and caring doctors that I know. His staff is helpful and professional. I would recommend Dr. Maas to anyone who is looking for great care.
Dr. Maas is an exceptional plastic surgeon
Dr. Maas is an exceptional plastic surgeon due to his exceptional skills and genuine care for his patients. Unlike many other doctors, he devotes time to addressing all your questions and thoroughly explaining the procedures and expected outcomes. I am willing to travel from Washington DC to seek his treatment, as I trust his ability to consistently deliver natural-looking and flawless results.
Dr. Maas is an aesthetic genius!
Dr. Maas is an aesthetic genius! Besides his very friendly light hearted demeanor, he is a master at his work. I look so much better, all refreshed, smooth & pretty and younger looking. I will recommend him to all my friends. Very professional and light years more advanced & competent then anyone I've ever experienced! Thank you Dr. Mass.
Dr. Maas is wonderful, he’s friendly and most importantly very skilled.
Maas Clinic is a friendly environment. You feel very comfortable to trust them with your procedures. Dr. Maas is wonderful, he’s friendly and most importantly very skilled. He takes the time to explain and answer all your questions and help with your concerns. You can tell he genuinely cares and wants what’s best for you and understands your situation. Staff are extremely courteous and professional. I love Cassidy, she’s the best! I highly recommend Dr. Maas for all your beauty needs.
Breast Procedures
Body Procedures
Hair Restoration At The Maas Clinic
Rediscover confidence through advanced hair restoration at The Maas Clinic. Dr. Maas offers personalized solutions tailored to your concerns, with options such as hair transplants, NeoGraft, facial hair restoration, and PRP treatment to restore a fuller, more vibrant head of hair.
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Injectable Treatments At The Maas Clinic
Revitalize your appearance through expertly administered injectable treatments at The Maas Clinic. Dr. Corey S. Maas utilizes a variety of dermal fillers and neurotoxins, such as Botox and Dysport, to enhance your natural beauty and achieve youthful, harmonious results. From addressing wrinkles and fine lines to non-surgical facelifts, rhinoplasty, lip augmentation, and jawline contouring, our comprehensive approach ensures personalized, stunning outcomes tailored to your unique features. Explore the transformative possibilities of injectables with Dr. Maas.
View All Injectable TreatmentsBeauty Buys & Events Take a look at our beauty specials and promotions.
All Your Aesthetic Needs
The Research Center FDA and Non-FDA Clinical Trials
Dr. Maas maintains an active role in evaluating emerging technologies by regularly participating in clinical trials.
Appearance Care Center Non-Surgical Aesthetics Services
At the Appearance Care Center in San Francisco, we use advanced skincare, dedicated to total face and body rejuvenation
The San Francisco Rejuvenation Center Accredited Ambulatory Outpatient Surgery Center
The San Francisco Rejuvenation CenterTM provides patients the best experience available today for aesthetic and reconstructive surgery.
Traveling Patients Our Concierge Services
For our traveling patients, The Maas Clinic offers concierge service that ensures a seamless and comfortable experience before, during, and after your procedure. Trust us to prioritize your well-being while you embark on your transformative journey.
