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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

Double Board Certified Dermatologist

Located at 14725 W Mountain View Blvd Suite 100 Surprise, AZ 85374

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

Specializes in…

  • Skin cancer prevention
  • Skin cancer detection
  • Skin cancer treatment, Mohs Surgery and Surgical Dermatology
  • General Dermatology

Caroline Carr, MD FAAD

Board Certified Dermatologist

Located at 10240 W Indian School Rd, Suite 115 Phoenix, AZ 85037

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


Located at 10240 W Indian School Rd, Suite 115 Phoenix, AZ 85037

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

Specializes in...

  • 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

Physician Associate

Located at 10240 W Indian School Rd, Suite 115 Phoenix, AZ 85037

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

Elyse Broucek, PAC

Physician's Associate

Located at 14725 W Mountain View Blvd Surprise, AZ 85374

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

Physician's Associate

Located at 14869 W Bell Rd Suite 103 Surprise, AZ 85374

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.

Jeanette Bannister, PAC

Physician Associate

Located at 10240 W Indian School Rd, Suite 115 Phoenix, AZ 85037

Jeanette is a Physician Assistant. She was raised in Fort Wayne, IN and completed her Bachelor of Science degree from Indiana University, Indianapolis. Jeanette went on to graduate school for her Master of Science and Physician Assistant studies at the University of St Francis in Fort Wayne, Indiana.

Prior to becoming a Physician Assistant she worked as a Neurodiagnostic Technician for 8 years. As a Physician Assistant, Jeanette has worked in neurosurgery trauma, neurocritical care, and trauma surgery and looks forward to learning and growing in her career with experience in plastic and hand surgery.

Outside of work she enjoys spending time with her husband and young children. Jeanette and her family love to spend their free time camping, traveling or exploring new places. 

Susan Iorio, MD

Board Certified Dermatologist

Located at 14725 W Mountain View Blvd Suite 220 Surprise, AZ 85374

Dr. Susan Iorio is a Board Certified Dermatologist with over 20 years of clinical experience. She has been practicing in the greater Phoenix area since 2005. She specializes in general and surgical dermatology. She is especially passionate about early detection and prevention of skin cancer and has extensive expertise in this area of interest.

Susan Iorio - MD

Dr. Iorio is a native of upstate New York and graduated from Lafayette College with a B.S. degree. She received her M.D. degree from Tulane University School of Medicine and received a M.S.P.H degree from Tulane's School of Public Health and Tropical Medicine. She interned at Mercy Hospital in Pittsburgh and did her dermatology residency training at Tulane University School of Medicine in New Orleans, where she served as Chief Resident.

She completed a dermatology Research Fellowship and has published in scientific journals. She has been selected as a Top Doc in Phoenix Magazine 2010 and 2011.

Away from the office, Dr. Iorio enjoys hiking with her husband, walking her dogs, and attending her children's competitive swimming events.

Specializing in...

  • Early Detection and Treatment of Melanoma
  • Skin Cancer Screenings
  • Dermatologic Manifestations of Systemic Disease and Medications
  • Treatment of Skin Cancer in Immunocompromised and Transplant Patients
  • General Medical and Surgical Dermatology

Spencer K Michalke, MD

Double Board Certified Plastic & Reconstructive Surgeon

Located at 14725 W Mountain View Blvd Surprise, AZ 85374

Dr. Spencer Michalke is a fellowship trained Plastic Surgeon specializing in Advanced Reconstruction and Microsurgery. He understands that many people do not end up in a doctor’s office by choice and strives to ease any anxieties and takes the time to address any concerns or questions that patients may have. Committed to safe and compassionate care, Dr. Michalke works with each patient individually to form a treatment plan focused on maximizing their goals and strives to achieve the best possible aesthetic outcome for each patient. He is committed to providing the same care to his patients that he would want for his own family.

Spencer K Michalke - MD

Dr. Michalke attended Wake Forest University School of Medicine. He then completed General Surgery at one of the busiest and largest surgical residencies at the University of Texas Health Science Center - San Antonio and is a Diplomate of the American Board of Surgery (DABS). Following this, he trained at the University of Mississippi Medical Center in Plastic and Reconstructive Surgery, and he then finished his training with a Fellowship specializing in Microsurgery with the renowned University of Pittsburgh Medical Center Department of Plastic Surgery, wherein he also served as a Clinical Instructor.

He is uniquely qualified to offer advanced reconstruction in breast reconstruction, head and neck cancer reconstruction, oncologic acquired defects and extremity (or limb) salvage to include replantation of fingers and hands.

Dr. Michalke's practice enjoys the full breadth of the field of Plastic Surgery and his unique clinical interests lie in breast reconstruction and aesthetic surgery, fat grafting procedures, complex abdominal wall reconstruction, extremity salvage, craniofacial trauma, body lift procedures, and non-surgical facial rejuvenation.

Specializes in…

  • Cosmetic Surgery
  • Fellowship Trained in Microsurgical Reconstruction
  • Breast Reconstruction, Abdominal Wall Reconstruction, Extremity
  • Salvage and Body lift procedures 

Kevin Nethers, MD

Board Certified Dermatologist

Located at 14725 W Mountain View Blvd Suite 100 Surprise, AZ 85374

Dr. Kevin Nethers is a board certified dermatologist, originally from Orlando, FL, who is now practicing full time at our Surprise location. He has published numerous articles on a variety of dermatological topics including melanoma, melasma, cutaneous larva migrans, atypical pigmented lesions, pemphigus vulgaris, syphilis and genodermatoses. He is passionate about the entire field of dermatology and treats all types of skin, hair and nail disorders.

Kevin Nethers - MD

Dr. Nethers attended the University of Florida for his undergraduate degree followed by the University of South Florida College of Medicine for medical school. In medical school he received many honors including selection as a national Arnold P. Gold Humanism Honor Society inductee and scoring in the top 10th percentile on various standardized exams. In medical school he also spearheaded data collection on a cohort of over 1000 patients with melanoma who were treated at Moffitt Cancer Center. This data has now been cited in the most updated NCCN cancer treatment guidelines.

Dr. Nethers went on to complete a one-year general medicine internship at Tampa General Hospital via the University of South Florida. Subsequently he completed a three-year dermatology residency training program in Orlando, FL via the KCU-GMEC/ADCS Consortium where he served as Chief Resident. He excelled in his residency, receiving outstanding patient satisfaction scores and recognition from staff and colleagues for his thorough patient care and contributions to the program.

During residency, he organized a partnership with Shepherd’s Hope, a clinic in the Orlando community, to provide free dermatological care on a weekly basis to patients who could not otherwise afford healthcare. He also contributed to academia via presentations at national conferences including the American Academy of Dermatology Annual Meeting and published articles in journals including the prestigious Journal of the American Academy of Dermatology.

Hailing from the sunshine state, Dr. Nethers is very familiar with the deleterious effects of the sun. Melanoma and non-melanoma skin cancers run in his family giving him extra motivation to remain on the forefront of treating these diseases.


  • Undergraduate at the University of Florida
  • Medical School at the University of South Florida
  • Internship at the University of South Florida
  • Dermatology Residency at Kansas City University/ADCS Consortium of Orlando

Specializes In…

  • Procedural Dermatology
  • Skin Cancer Expert
  • General Dermatology

Ashley Ciallella, PAC

Physician's Associate

Ashley Ciallella is a Board-Certified Physician Assistant from Paducah, Kentucky. She received her Bachelor of Science Degree from Murray State University in Murray, Kentucky and went on to graduate with her Master of Science in Physician Assistant studies from Sullivan University in Louisville, Kentucky. Upon graduation, she worked one year in Primary Care before changing into a surgical specialty. Ashley relocated to Arizona four years ago to pursue a position as a surgical Physician Assistant in Orthopedic Surgery.

Prior to PA school, Ashley was a newborn hearing screener and EMT certified. She was president of Sigma Alpha Lambda honor society at Murray State and a member of Alpha Sigma Alpha Sorority. 

Ashley has always been passionate about surgery and the ability it allows to improve a patient's mindset and quality of life. With four years of experience in orthopedic surgery, Ashley is eager to now be practicing in Plastic Surgery. In her free time, Ashley enjoys traveling, hiking, and spending time with her two pugs."


  • Bachelor of Science: Murray State University
  • Master of Science in Physician Assistant Studies: Sullivan University

Bianca Lopez, PAC

Physician's Associate

Located at 14725 W Mountain View Blvd Surprise, AZ 85374

Bianca Lopez is a board-certified physician assistant hailing from Arizona. Her academic journey commenced at Grand Canyon University, where she earned a Bachelor of Science in Health Sciences, specializing in advanced patient care. She furthered her education by obtaining a Master of Science degree in Physician Assistant Studies from Northern Arizona University.

With a remarkable 14-year background in emergency,  Bianca's career began as a paramedic and evolved into her role as a Physician Assistant in the dynamic emergency room environment. Additionally, Bianca is a certified aesthetic injector, proficient in a range of cosmetic injections, including dermal fillers and Botox.

Bianca's professional philosophy is grounded in the seamless fusion of wellness, inner health, and beauty, acknowledging the intricate interplay between the artistic and scientific facets of medicine. Her career trajectory guided her to Regency Specialties, a distinguished practice renowned for its expertise in dermatology, cosmetic procedures, and reconstructive surgeries, spanning from enhancing aesthetics to the meticulous art of reconstruction.

Outside of her thriving career, Bianca treasures her personal life, devoting time to her loving family, cooking and exploring the world through travel. Fluent in Spanish, she enhances her ability to connect with and serve a diverse range of patients and communities


  • Bachelor of Science in Health Sciences: Grand Canyon University
  • Master of Science degree in Physician Assistant Studies: Northern Arizona University

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 2016, 2019, 2020, 2021, and 2022 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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