Dr. Colleen MacInnis, MD

Dr. Colleen MacInnis is a Board Certified Dermatologist and a highly trained MOHs Surgeon. Dr. MacInnis graduated from the University of Oklahoma Medical School in 1998 and finished her Dermatology residency in 2002. She is an expert in treating disorders of the skin, hair and nails. Her expertise encompasses performing dermatological surgeries, specifically the highly skilled microscopic skin cancer surgery, MOHs.

During her training, Dr. MacInnis worked directly under the guidance of world renowned pathologist, Dr. Neil Crowson. As a MOHs surgeon, Dr. MacInnis is exceptionally trained in reading pathology. She began practicing as a Dermatologist in Oklahoma, eventually moving and settling in Central Florida in 2007. Known for her caring bedside manner and warm smiles, Dr. MacInnis has a quickly established a strong, positive reputation amongst the Central Florida community. As a MOHs surgeon, Dr. MacInnis has performed over 7,000 cases involving skin cancers of the face, ears and nose, as well as, extensively involved skin cancers of the body. Her exceptional knowledge and skill level has led her to perform some of the most complicated and involved skin cancer cases.

While practicing in Oklahoma, Dr. MacInnis was involved in several research programs including: The Testing of the Dermatoscope in the Evaluation and Diagnosis of Melanoma and Medical Treatment Agents for Psoriasis. She has also published research involving the Chemical and Medical Treatment of Melanoma and Basal Cell Carcinoma. In addition, Dr. MacInnis is an active participant in the training and education programs of Physician Assistants. Prior to practicing medicine, Dr. MacInnis was a Doctor of Veterinary Medicine in Oklahoma, where she spent almost 10 years working as a veterinarian on large farm animals.

Dr. Colleen MacInnis focuses on high quality patient care and patient satisfaction as her primary goals. Dr. MacInnis is an American Board Dermatology Diplomat, a Fellow of the American Society of MOHs Surgeons and is licensed to practice medicine through the Florida Board of Medicine.

Meet Us

Mt Dora...Leesburg...The Villages  Florida

Sarah Yoho, PA-C​​

Sarah is a Nationally Board Certified Physician Assistant and has been with MacInnis Dermatology since August 2012. She was born and raised in Florida, growing up on the East coast near Cocoa Beach. She received her Bachelor’s degree in Biomedical Sciences at the University of South Florida and her Master’s degree from the Physician Assistant program at South University in Tampa.

Sarah specializes in the diagnosis and treatment of skin, hair, and nail disorders. Working closely with Dr. MacInnis she provides the highest quality skin cancer care. She is experienced in dermatologic surgery with an emphasis on excisions and also works in conjunction with Dr. MacInnis assisting with all aspects of MOHs surgery.

Dedicated to providing outstanding, comprehensive Dermatological care, Sarah treats every patient with kindness and compassion. Her philosophy is to provide high quality patient centered care while creating a warm environment with a smile. In her spare time, Sarah enjoys dabbling in the arts including taking film, theatre, and improv classes. She enjoys spending time with her family, friends and husband. She enjoys good humor and believes one should laugh as often as possible.

She is a member of the American Academy of Physician Assistants, Florida Association of Physician Assistants, Florida Society of Dermatology Physician Assistants and the Society of Dermatology Physician Assistants.

Nichole Holoman

In 2010 Nichole joined MacInnis Dermatology, working in the clinical department as a Medical Assistant. She quickly advanced to the Clinical Supervisor, then progressed to the role as practice manager in 2013. Nichole has approximately 6 years of clinical experience working with Dr MacInnis and various dermatologists, MOHs, and plastic surgeons. Her experience includes general and procedural dermatology, including medical coding.

In 2007 she graduated from the University of Miami with a BS in Biology minoring in chemistry. After graduation, she began working with Dr MacInnis and found great satisfaction working with patients. Through her experience working as a medical assistant and progressing into a leadership role, she found her true passion. Expanding her knowledge base, she obtained her MS in Executive Health Administration from the University of Central Florida. Currently, she is a member of American College of Healthcare Executive (ACHE), Medical Group Management Association (MGMA) Florida Chapter, and Association of Dermatology Administrators and Managers (ADAM). As an active member in ADAM, she serves on the education committee and helps the board.

Nichole is dedicated to leading a team of highly skilled, confident, proficient and caring individuals to deliver the highest quality patient care. She is a compassionate individual, committed to making a difference by creating a focused, positive, efficient and sympathetic work environment. She is excited to use her new education to enhance MacInnis Dermatology and the team. Through this, she feels empowered achieving her passion to make a positive impact in the lives of others.
When Nichole has free time, she enjoys traveling to new destinations enjoying the sights, art, history, activities and culinary diversity. Additionally, she enjoys playing with her Chihuahua Rio, spending time with her fiance, friends, and family. Health and fitness plays a large role in her life keeping her fit and grounded.

Dr. Kay Johnston, MD

Dr Kay joined MacInnis Dermatology in 2017.  She relocated from San Angelo, Texas, where she practiced for 18 years after completing her military obligation in 1999.  During her time in Texas, she frequently gave dermatologic seminars to the community, served as Chief of Staff for the local Medical Center and served as the President of the County Medical Society.

Dr Kay received her medical education from the University of Nebraska Medical College and then completed her residency at Wilford Hall USAF Medical Center in San  Antonio.  Her approach to patient care is understanding and supportive, which is driven both by her competency and personality.  With a caring attitude, Dr Johnston works as a team with the staff to ensure responsiveness to the patient’s needs, keeping them informed about their health issues.  Dr Kay  is Board Certified by the American Board of Medical Specialties. In addition to general dermatology, Dr Kay has special training in surgical and cosmetic dermatology, specifically MOHS surgery.  She is a fellow of the following professional societies: American Academy of Dermatology (AAD), American Society for Mohs Surgery (ASMS), and American Society for Dermatologic Surgery (ASDS).

Dr Kay has one daughter, who is her pride and joy! In her spare time, she enjoys playing tennis, cycling, and traveling. Dr Kay looks forward to providing the highest quality in general, cosmetic and surgical dermatologic care to the wonderful men, women and children in the surrounding areas.

Beverly Connolly, PA-C

Beverly is a Nationally Board Certified Physician Assistant and joined MacInnis Dermatology in 2015. She originates from Huntington Valley, PA and has a diverse background having lived in Alaska, the Midwest, the Northeast and now settling in the Southeast. Beverly began her career as a Physical Education Teacher, Coach and Athletic Director after she earned her BS in PE and MS in Perceptual Motor Development where she remained for 22 years. In 1999, Beverly graduated with a BS in Physician Assistant Studies from Hahnemann University.

Beverly has over sixteen years of experience as a Physician Assistant in Dermatology, with extensive training in treating rashes, itching, psoriasis, warts, acne and a multitude of other general dermatology issues. With compassion, Beverly is predominately concerned with the needs of the patient, treating them with the same care as she would her own family members. Her focus is using a patient centered approach, treating the patient as a whole through integrative medicine and thoroughly educating patients.

In Beverly's downtime, she enjoys spending time with her son, playing scrabble, dancing, jig-saw puzzles, sports and outdoor adventures off the beaten path. When she is not playing piano, guitar, flute or French horn, she dreams of hiking the Appalachian Trail. Her personality is down-to-earth with a sense of humor and finding joy in every day. Her motto is, "Life is a song to sing" and believes laughter is the best medicine.

Beverly holds a National Certification of Physician Assistants (NCCPA) and a Florida state license. She is a member of Society of Dermatology Physician Assistants (SDPA), Florida Society of Dermatology Physician Assistants (FSDPA), Florida Academy of Physician Assistants (FAPA) and is a SDPA Diplomat.

(352) 350-5230

Tonya Terwilliger - PA-C

​​Tonya is Board Certified by the National Commission on Certification of Physician Assistants (NCCPA). She joined MacInnis Dermatology in the summer of 2018. Tonya was born and raised in Ohio. She attended Ohio University graduating Magna Cum Laude with a Bachelor of Science degree in Biological Sciences/Pre-Medicine in 1998.  In 2003, she graduated from Kettering College of Medical Arts with a Bachelor of Science degree in Physician Assistant Studies, Cum Laude. Tonya has been practicing as a Dermatology PA for 15 years.  

Tonya specializes in the diagnosis and treatment of skin, hair, and nail disorders. Working closely with Dr. MacInnis she provides the highest quality dermatology care. With her wonderful bedside manner, she prides herself on providing patient centered care and building strong relationships with her patients. Her goal is to provide excellent dermatology care to our local patient population.

Prior to moving to Florida, she resided in Arizona. Tonya and her husband moved to Florida in 2007 and live in the Wesley Chapel area. Their daughter is their pride and joy. They spend their free time at Disney and enjoy all things Disney. She has two English labs, and a Maine Coon kitty to complete her household.

She is a member of the American Academy of Physician Assistants, Florida Academy of Physician Assistants, and the Society of Dermatology Physician Assistants.

Stephanie, CME

In the beginning of 2017, Stephanie joined the MacInnis Dermatology team as a Licensed Medical Aesthetician bringing 8 years of experience. As a native Floridian, Stephanie graduated from Valencia College with an A.A. degree. She then went on to receive her Aesthetic training at the Avalon Center for Technical Excellence and continued her postgraduate education at The International Dermal Institute. She iis a licensed Medical Electrologist, who graduated from the Orlando Institute and received additional training from the LaserSkin Institute. Her educational background provided a comprehensive skin assessment protocol. She has trained in the areas of Chinese diagnosis, manual lymph drainage, rosacea, sensitive skin, facial and pressure point massage. In addition to her skincare training, she is a skilled make-up artist, providing a full range of healthy make-up options and applications.

Having a well-rounded background enables her to provide superior skin care treatments, regimen and plans. Fueled by her passion for skin care, Stephanie can provide a wide variety of procedures. Procedures she is experienced with are chemical peels, microdermabrasion, dermaplaning, microneedling, extractions, laser hair removal and non-ablative laser treatments. To achieve optimal results, Stephanie works in conjunction with the medical providers here at MacInnis Dermatology to offer a comprehensive educational and treatment plan for your best skin health habits.

Stephanie strives to deliver high quality skin care procedures, making all of her patients feel beautiful in their skin. Being trained and certified in advanced medical-grade treatment protocols allows her to provide in depth comprehensive facial treatments. When she can, she enjoys outdoor activities such as hiking and kayaking. She is a big sister in the Big Sister Big Brother program and enjoys volunteering for charities such as Stirrups 'n Strides. She routinely keeps up with the latest skin care and skin treatments, and advances through continuing education. She is currently offering complimentary skin care consultations.