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At Regency Specialties, we believe great care starts with great doctors. We have assembled some of the nation’s leading specialists in dermatology, plastic surgery, breast oncologic treatment and reconstruction, and dermatopathology.  

Betty Hinderks Davis, MD FAAD

Board-Certified & Mohs Fellowship Trained Dermatologist 

Dr. Betty Hinderks Davis is a nationally recognized, board-certified dermatologist and a fellowship trained Mohs surgeon who has practiced in the greater Phoenix area since 2005. Dr. Davis has advanced the field of dermatology and Mohs surgery through her numerous scientific and educational contributions. While an expert in skin cancer diagnosis and treatment, she is passionate about skin cancer prevention and early detection, as well as working in conjunction with her patients to achieve optimal skin health.

Dr. Betty Hinderks Davis - MD

Dr. Davis graduated as an honors scholar from the University of Missouri-Columbia (UMC), majoring in biochemistry. She completed her medical school training at UMC, graduating cum laude. Her residency training in dermatology was then completed at UMC. Her surgical fellowship took her to Birmingham, Alabama where she completed a Mohs and dermatologic procedural fellowship with Dr. Gary Monheit. She also received extensive cosmetic training during this time. Dr. Davis’ fellowship culminated with the receipt of the Mohs College Theodore Tromovich Award for research done on periorbital tumors in 2004, which is the highest national fellow award presented by the Mohs College.

In April 2017, Dr. Davis was also awarded the Outstanding Young Physician Honor for being distinguished in and contributing to advancement of dermatology as a medical profession by the University of Missouri.

Dr. Davis is passionate about the patient experience, and was the national recipient of the “Top Performer Clinic — Overall Patient Experience” in 2013 from Health Stream. Dr. Davis believes that great healthcare begins with a patient-centric, team-based approach. She works to ensure patients have the right care when needed, as well as early diagnosis and treatment. She strives to cultivate an environment where patients are active in their care.

  • National leader in dermatology and Mohs treatment of skin cancer
  • Arizona Dermatology & Dermatologic Surgery Society Board Member since 2017
  • In practice over 20 years
  • Over 50,000 Mohs surgeries performed
  • “Top Performer Clinic — Overall Patient Experience” 2013 from Health Stream


  • Undergraduate: University of Missouri-Columbia
  • Medical School: University of Missouri-Columbia
  • Residency: University of Missouri-Columbia
  • Fellowship: MOHS and dermatologic procedural fellowship with Dr. Gary Monheit

Caroline Carr, MD

Dr. Caroline Carr is a dermatologist who completed her residency training at the University of Missouri in Columbia, MO. During residency, she worked with numerous faculty members to publish journal articles on a variety of topics including drug rashes in the pediatric population, as well as drug-induced bullous pemphigoid and allergic contact dermatitis.

Dr. Caroline Carr - MD

Dr. Carr served as co-chief resident of MedZou, a clinic for underprivileged patients in Missouri, and organized and executed the first MedZou procedural clinic for the treatment of skin cancer. She volunteered for a similar clinic during medical school, and focused on treating underprivileged patients with psoriasis. She enjoys teaching and presenting on the topic of dermatology, and has spoken at the Missouri Dermatological Society annual meeting, at the American Academy of Dermatology annual meeting, and most recently was a speaker at the Missouri Athletic Trainers Association conference, where she addressed skin disorders in athletes.

Dr. Carr completed her undergraduate studies at New York University and attended medical school at the University of Nevada in Reno. She completed her internship year with the internal medicine program at the University of Missouri in Columbia, where she stayed to complete her dermatology residency. Dr. Carr is passionate about patient care and has special interest in skin cancer prevention, monitoring, and treatment; contact dermatitis, and dermatologic manifestations of systemic disease.


  • Undergraduate at New York University
  • Medical school at the University of Nevada, Reno
  • Internship at the University of Missouri – Columbia
  • Dermatology residency at the University of Missouri – Columbia 

Special interests

  • Speaking/teaching on the topic of dermatology
  • Prevention, monitoring and treatment of skin cancer
  • Contact dermatitis
  • Dermatologic manifestations of systemic disease and medications

Drew Klug, MD

Dr. Klug is from Omaha, Nebraska. He completed his undergraduate studies at Creighton University, where he graduated magna cum laude. At Creighton, he was active in Alpha Phi Omega, a national service organization.

Dr. Drew Klug - MD

Dr. Klug attended medical school at the University of Nebraska (UNMC), graduating with highest honors. During his time at UNMC, he was appointed to AOA, a medical honors society, in recognition of his excellence in academics and medicine.

He completed his internship at Intermountain Medical Center in Murray, Utah. During his internship, he gained significant exposure to internal medicine and surgery. He further specialized in dermatology at the University of Missouri- Columbia (UMC).
While at UMC, he continued his service-oriented mindset helping at a volunteer clinic for underserved populations. He performed community skin checks to help detect and treat skin cancer in the community. 

During his second and third year of residency, he spent considerable time teaching surgical skills at the Veterans Affairs Hospital to new residents and medical students. 

He spent his final year of residency as a chief resident helping coordinate care at the Veterans Affair, teaching resident academics, cosmetics as well as coordinating a volunteer clinic for underserved populations. During his training, he contributed to the dermatologic literature.
He is a member of the American Academy of Dermatology and the American Society of Dermatologic Surgery. Dr. Klug practices the full spectrum of medical and surgical dermatology, treating patients of all skin types and ages. Outside of dermatology, he enjoys spending time with his family, hiking, camping, and aviation.


  • Undergraduate at Creighton University
  • Medical School at the University of Nebraska
  • Internship at Intermountain Medical Center in Murray, UT
  • Dermatology residency at the University of Missouri – Columbia

Areas of interest

  • Medical and surgical dermatology
  • Prevention/management of melanoma and other types of skin cancer
  • Treatment of skin cancer in immunocompromised and transplant patients
  • Contact dermatitis
  • Other dermatologic disorders including psoriasis, acne, eczema and dry skin

Stephanie Ewalt, PAC

Stephanie Ewalt was born and raised in Tucson, Arizona. She received her Bachelor of Arts in Chemistry at Grinnell College in Iowa, and went on to graduate school at Midwestern University in Glendale. She spent time as a CNA in nursing homes and hospice, and was a PT technician prior to attending PA school. Her three greatest accomplishments include serving on a medical mission trip in Panama, being captain of her collegiate golf team during the first time in history the team made it to Nationals, and running a marathon. She has always had a passion for dermatology, and looks forward to continuing to care for patients and practicing in the field.


Bachelor of Arts in Chemistry – Grinnell College
Master of Medical Science in Physician Assistant Studies – Midwestern University

Brittany Silverman, PAC

Brittany Silverman is an Arizona native and nationally certified as a Physician Assistant. She completed her undergraduate education at the University of Arizona, where she graduated Cum Laude with a Bachelor of Science in Physiology. She then earned her Master’s degree at Hofstra University in Long Island, New York. 

Education and training

As a graduate student, Brittany received clinical dermatology training at a private practice in her hometown of Tucson, Arizona. 

After earning a perfect score on the dermatology section of her licensing exam, she completed additional training from the American Academy of Dermatology and became a proud Diplomate Fellow through the Society of Dermatology Physician Assistants. 

Brittany has a strong passion for dermatology, which began when she was a teenager. She strives to treat all her patients with a high degree of understanding and compassion. Her mission is to provide excellent patient-centered care and to help her patients feel comfortable and confident in their own skin. In her free time, Brittany enjoys spending time with her family and friends. She lives a very active lifestyle and loves hiking, traveling, running, cycling, and swimming.

Elyse Broucek, PAC

Elyse Broucek is a board-certified Physician Assistant, born and raised in Grand Rapids, Michigan. She relocated to the Phoenix area to begin her career with Regency. She received her Bachelor of Science degree from Grand Valley State University in Michigan and went on to graduate with her Master of Science in Physician Assistant Studies from the University of Saint Francis in Fort Wayne, Indiana.

Prior to attending PA school, Elyse spent time working as a nurse tech in a large hospital and also in the front office of an oncology clinic. During PA school, Elyse volunteered for many different organizations in the Fort Wayne area and also obtained excellent leadership skills by serving as the Co-President of her class.

After completing a clinical rotation in Plastic Surgery during PA school, she grew to love the field and looks forward to continuing to practice in plastics. In her free time, Elyse enjoys spending time with family and friends and exploring all the fun things Phoenix has to offer. 


Bachelor of Science — Grand Valley State University
Master of Science in Physician Assistant Studies — University of Saint Francis

Karla Munoz, PAC 

Karla Munoz is originally from Coahuila, Mexico, although she has spent most of her life in Phoenix, AZ. She went to The University of Arizona and received her Bachelor of Science in Physiology with a minor in Spanish. She earned her Master of Science in Physician Assistant Studies at Northern Arizona University Downtown Campus.

Prior to becoming a Physician Assistant, she volunteered at a non-profit clinic in Tucson, AZ where she gained valuable dermatology experience by working alongside the clinic’s Dermatologist and providing care to the underserved population. As a graduate student, Karla received additional clinical and procedural dermatology training at a private practice in Fountain Hills.

Karla is a member of the Society of Dermatology of Physician Assistants and the American Association of Aesthetic Medicine and Surgery. Karla strives to provide quality patient-oriented care and has a special interest in skin cancer prevention and aesthetic medicine. Karla lives in Biltmore with her fiancé. She enjoys spending time with family and friends and weightlifting.

Ashkaun Shaterian, MD 

Undergoing surgery can be life-changing. Your trust in choosing Dr. Shaterian as your surgeon is valued and taken seriously. Caring for you and your family members at the highest level is his top priority. Dr. Shaterian strives to provide optimal surgical results and a positive patient experience. You will find his patient focused consultations and individualized treatment plans are centered on understanding your goals and expectations. With 12 years of post-college education and training at top programs in the country, Dr. Shaterian is able to provide quality care and successful patient outcomes.

Dr. Ashkaun Shaterian - MD

Education and training

Dr. Shaterian obtained his medical education from the University of California, San Diego School of Medicine. He completed six years of surgical training in plastic and reconstructive surgery at the Aesthetic and Plastic Surgery Institute of the University of California, Irvine.

He also completed sub-specialty training via the Hand and Microsurgery Fellowship at the Christine M. Kleinert Institute for hand and microsurgery. Dr. Shaterian has also earned a Master’s degree in clinical research at the University of California, San Diego. He participated in the NIH Clinic Research Training Program, and has published over 25 scientific research articles and book chapters in cosmetic surgery, hand surgery, and reconstructive plastic surgery.

Areas of interest

  • Reconstruction: Breast and skin cancers, wounds, trauma
  • Plastic Surgery: Breast, abdomen, and mommy makeover
  • Hand and extremity surgery: Nerve disorders (i.e. carpal tunnel syndrome), arthritis, traumatic injuries (i.e. hand/wrist fractures, tendon/ligament injury)
  • Non-surgical treatments: Therapeutic hand/wrist injections, varicose vein care, cosmetic injections of hand and face.

Martin Benjamin, MD

Dr. Martin Benjamin is a Manhattan-trained plastic surgeon who is also both a Chicago-born and Arizona-raised native. He attended the University of Arizona in Tucson to earn his bachelor’s degree in molecular and cellular biology, with minors in chemistry and health and human service administration. He returned to complete his medical degree just one year after. 

Dr. Martin Benjamin - MD

Dr. Benjamin’s strong interest in translational research, cancer epigenetics, and novel cancer drug development motivated him to conduct research studies at the University of Texas M.D. Anderson Cancer Center as a designated Medical Student Research Fellow. Dr. Benjamin's work helped contribute to the opening of new Phase I and II clinical trials for novel cancer drug development in Myelodysplastic syndrome (MDS), Acute Lymphoblastic Leukemia (ALL), as well as early-stage colon and breast cancers.

After medical school, Dr. Benjamin returned to his hometown of Chicago, Illinois, to complete five years of general surgery residency at the University of Illinois at Chicago. It was here where he also trained at renowned institutions such as Cook County Hospital, the Jesse Brown VA in Chicago, and Level I Advocate Christ Medical Center.

Dr. Benjamin presented at several national meetings, including at the American Medical Association as well as the American College of Surgeons annual meeting. He also served as the Administrative Chief Resident of his residency program. It was here that his passion for plastic surgery further developed, and he was recruited to New York to pursue a plastic and reconstructive surgery residency.

Dr. Benjamin completed his plastic and reconstructive surgical training at the Long Island Plastic Surgical Group, PC, in affiliation with SUNY-Stony Brook University, which is the oldest and largest private academic plastic surgery practice in the United States. 

Dr. Benjamin has particular interests in cosmetic/aesthetic surgery with an emphasis on rhinoplasty, facial rejuvenation, and upper and lower eyelid blepharoplasty, as well as liposuction, abdominoplasty, and breast aesthetic surgery.

Dr. Benjamin has presented at numerous locoregional as well as national meetings. His published work spanning the years of 2018 - 2019 has garnered back-to-back American Society of Plastic Surgery Outstanding Paper Presentation awards in both aesthetic and breast reconstruction, respectively.

He has multiple published primary papers in the Journal of Plastic and Reconstructive Surgery, as well as the Annals of Plastic Surgery. He is an active member of the American Society of Plastic Surgeons, as well as the American Society for Aesthetic Plastic Surgery.

Dr. Benjamin enjoys the creativity and complexity of cosmetic/aesthetic surgery. He is dedicated to patient safety while striving to help patients achieve the results they desire. After spending eight years training in two of the largest and most populated cities in the United States, he is very excited to be coming back home to the valley.

Dr. Khang Nguyen, MD

Dr. Khang Nguyen is passionate about helping patients achieve their goals in aesthetic and reconstructive plastic surgery. He understands that every patient is unique and strives to tailor clinical advice, surgical solutions, and artistic vision to fit the health needs and aesthetic preferences of each individual.

Dr. Nguyen offers a broad spectrum of cosmetic and reconstructive procedures, but has particular interest in aesthetic surgery of the face and body and advanced breast reconstruction techniques using the patient’s own tissue (DIEP flap, PAP flap) with or without the use of implants.

Dr. Nguyen holds a Bachelor’s Degree in Biology from Harvard University and a Doctor of Medicine from Northwestern University. Following medical school, he completed six years of residency training in plastic and reconstructive surgery at Northwell Health System, the largest healthcare network in New York City and Long Island. Dr. Nguyen was then selected to complete a prestigious fellowship in reconstructive microsurgery with advanced training in breast reconstruction techniques at the University of Pennsylvania.

Areas of Interest:

Aesthetic (face): Rhinoplasty, Facelift, Necklift, Non-Surgical Rejuvenation

Aesthetic (body): Breast Augmentation, Breast Lift, Breast Reduction, Abdominoplasty, Arm Lift, Thigh Lift, Gluteal Augmentation

Reconstructive: Breast Reconstruction (DIEP flap, PAP flap, implants), lower extremity trauma reconstruction, skin cancer reconstruction

Jason Mussman, MD FACS

Board-Certified Plastic & Reconstructive Surgeon

Dr. Jason Mussman is one of Phoenix and Scottsdale’s most experienced and well-respected plastic surgeons, offering advanced cosmetic and reconstructive procedures focused on accomplishing each patient’s individual goals safely and successfully. Dr. Mussman offers consultations in a comfortable and discreet setting to explore your aesthetic goals and desires. With an understanding that each person is a unique individual and each person’s body type and culture leads to a different aesthetic vision, Dr. Mussman will discuss your vision in a comfortable, judgment-free way and outline a plan to maximally achieve your goals.

Dr. Jason Mussman - MD

From your initial consultation to your final follow-up visit and beyond, Dr. Mussman will remain committed to your wellbeing. You will never feel rushed, and Dr. Mussman will happily address all questions and concerns before, during, and after your aesthetic procedure. When you place yourself in the hands of Dr. Mussman, you can have peace of mind knowing you have selected one of the most qualified, experienced, and skillful plastic surgeons in the area. Dr. Mussman prides himself on delivering safe, cutting-edge plastic surgery techniques that are based on sound principles that have stood the test of time.

Because Dr. Mussman recognizes that his patients can’t afford much downtime, he minimizes the healing process with a constant focus on comfort, pain control, and safe recovery for his patients.

  • Board-certified by the American Board of Plastic Surgery
  • Fellow of the American College of Surgeons
  • Voted “Top Doc” in Phoenix magazine 2020 Top Plastic Surgeon in the Valley

Dr. Mussman’s background

Dr. Mussman attended Wayne State School of Medicine, where he graduated at the top of his class. He then traveled to Loma Linda University Medical Center in Southern California, where he underwent six years of intensive training at one of California’s most prestigious centers for plastic surgery. 

After residency, Dr. Mussman was proud to serve the needs of Northeast Michigan in advanced plastic and reconstructive surgery. He developed a busy practice that offered services ranging from cutting-edge cosmetic surgery to advanced limb salvage techniques. He was honored by his colleagues when he was elected Chair of Surgery in his first year of practice.

In 2014, Dr. Mussman was recruited to Phoenix to serve the needs of a new Level 1 trauma center that opened at Abrazo West Campus. He remains strongly committed to Abrazo West, and is honored that other distinguished plastic surgeons have joined him to serve the needs of Phoenix and Scottsdale. Regency Specialties now serves three Level 1 trauma centers, one cancer center, and the reconstructive needs of many of the Valley’s top surgeons.

Dr. Mussman’s practice encompasses the entire field of plastic surgery. He offers a full complement of cosmetic surgeries, including facelifts, rhinoplasty, breast enhancement, abdominoplasty, and liposuction. These procedures are constantly evolving to stay on the cutting edge. 

Dr. Mussman is also a passionate reconstructive surgeon. He pursues excellence in breast reconstruction, skin cancer reconstruction, and limb salvage. In addition, Dr. Mussman enjoys repairing large abdominal hernias that are outside the bounds of traditional hernia repair techniques.

Dr. Mussman is a highly trained hand surgeon. He performs all types of hand surgery, including carpal tunnel, trigger finger, Dupuytren’s contracture treatment, and fracture, nerve, tendon, and artery repair. His microsurgical expertise allows for re-attachment of severed digits and hands whenever this is a possible option.

Practice focus and interests

  • Reconstruction: Advanced skin cancer reconstruction, trauma limb salvage, trauma facial and calvarium skull reconstruction
  • Cosmetic: Facial rejuvenation utilizing low risk, fast recovery facelift, and minimal access techniques. Breast enhancement and body contouring in postpartum, weight loss, and fitness population


  • Undergraduate: Albion College
  • Medical School: Wayne State University School of Medicine
  • Residency: Loma Linda University Medical Center
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