Meet Our Providers

Dr. Charles Moon, M.D.

After graduating from Washington University in St. Louis with honors, Dr. Moon completed his medical degree from the University Of Missouri School Of Medicine, graduating magna cum laude.  He then joined the United States Army as a medical officer and completed his internship and dermatology residency at the Uniformed Services Health Education Consortium in San Antonio, Texas.  Thereafter, he served as the dermatologist for Ft. Knox, Kentucky for five years and also deployed to Iraq with the 101st Airborne Division as a flight surgeon for one year.  After leaving military service in 2008, Dr. Moon was in private group practice in Louisville Kentucky and served as an Assistant Professor of Medicine at the University of Louisville, School of Medicine.  A Missouri native, Dr. Moon relocated to Cape Girardeau and established Advanced Dermatology of Southeast Missouri in 2009.  He established Shine Medical aesthetics in 2013 with a focus on cosmetic procedures and services in a spa setting.

Dr. Moon is a board certified dermatologist, a fellow with the the American Society for Mohs Surgery, and a member of the American Academy of Dermatology, the Alpha Omega Alpha Medical  Society, the American Society of Dermatologic Surgery, and the National Psoriasis Foundation.  He has authored numerous medical articles and book chapters on a variety of dermatology topics, in addition to lecturing on various dermatology topics across the United States.

In his free time, Dr. Moon enjoys spending time with his family, traveling, and supporting Mizzou athletics.

Dr. Richard Limbert, D.O.

Dr. Limbert’s education and experience are extensive. He graduated magna cum laude with a Bachelor of Science from the University of Missouri and was the valedictorian of his class at Kirksville College of Osteopathic Medicine. He completed his internship at Capital Region Medical Center in Jefferson City, Missouri. Thereafter, he completed his dermatology residency at Largo Medical Center in Tampa Bay, Florida. Dr. Limbert ranked #1 on his dermatology in-service exam and was nominated for numerous other awards by his peers, proving his commitment to excellence in the field of patient care and dermatology. He is a Fellow of the American Osteopathic College of Dermatology, American Academy of Dermatology, and the American Society for Mohs Surgery. Dr. Limbert holds a certificate of added qualification from the American Osteopathic Board of Dermatology in Mohs Micrographic Surgery.

Dr. Limbert resides in Cape Girardeau where he enjoys the outdoors and spending time with family. He has a passion for physical fitness, golf, and Mizzou athletics.

Dr. Theresa Mattingly, M.D.

Dr. Theresa Mattingly is a summa cum laude graduate from Rockhurst University in Kansas City, with a bachelor’s degree in biochemistry.  She earned a doctor of medicine from Saint Louis University School of Medicine.  She completed an internship in internal medicine from Southern Illinois University School of Medicine, where she also completed a dermatology residency and served as chief resident 2017-2018.

Dr. Mattingly is a board-Certified Dermatologist, and fellow of the AmericanAcademy of Dermatology.  Her clinical interests include adult and pediatric medical dermatology, skin cancer detection, and performing minor surgical and cosmetic procedures.  

Born and raised in Perryville, Missouri she is thrilled to return to and settle in southeast Missouri.  In her spare time she enjoys spending time with her fiancé and their families, traveling, running, and watching the Cardinals and Chiefs.

Heather Miller, FNP-BC, DCNP

A native of Southeast Missouri, Heather joined Advanced Dermatology of Southeast Missourii n 2009. Heather attended Southeast Missouri State University, where she graduated cum laude with a bachelor’s degree in nursing and a minor in child studies. She worked extensively as a head registered nurse in the urgent care and dermatology clinic settings for several years. Thereafter, Heather obtained her masters degree from Southeast Missouri State University, graduating with Honors as an Advanced Practice Registered Nurse in 2009. Heather has been an integral part of Advanced Dermatology since its opening in 2009.

Heather is a board-certified family nurse practitioner and dermatology certified nurse practitioner. She is a member of the Missouri Nurses Association, the Society of Dermatology Nurse Practitioners, and the Heartland Advanced Practice Nurse Network. Heather and her husband, Matt, reside in Cape Girardeau where they enjoy spending time with their daughters. Aside from her family, she is active with volleyball, golf, and boating.

Christina Cossou, APRN, FNP-C

A native of Jefferson City, MO, Christina attended the University of Missouri – Columbia where she graduated with her Bachelor of Science in Nursing degree. She then worked as an RN in St. Louis in the Emergency Department at Barnes-Jewish Hospital before pursuing her advanced nursing degree through Maryville University. After graduating with her Family Nurse Practitioner degree in 2016, she and her family relocated to Southeast Missouri to be close to family.

Christina, her husband, and three children reside in Cape Girardeau. They enjoy being outside, athletics, and spending time with family and friends. When she is not with her family, she enjoys reading and fishing.

Amy Willingham, PA-C,MSPA

Amy joined Advanced Dermatology of Southeast Missouri in 2011. She completed her Bachelor’s Degree in Biology at Southeast Missouri State University in 2004, graduating with honors. She then attended Southern Illinois University Carbondale, graduating with a MS in Physiology, having authored numerous scientific articles related to the neuroscience of aging and memory. Here, she recognized her interest in health care and enrolled in the Physician Assistant studies program at SIUC in 2009, completing this course of study in 2011. Amy is passionate about patient care and making certain her patients understand their disease processes and treatment options, utilizing a team approach to achieve optimal results in skin health.

Amy resides in Jackson with her husband and three children. In her leisure time, you can find her hiking hills, cycling backroads, kayaking lakes, or reading on a back porch.

Dani Toal, DNP, FNP-C

Dani is a native of Cape Girardeau and a graduate of Cape Central High School. Dani attended Southeast Missouri State University, where she graduated with a Bachelor’s Degree in Science and Nursing in 2010. She worked as a registered nurse in the cardiac thoracic ICU for 4 years before pursuing her advanced degree in nursing. Thereafter, Dani attended the University of Missouri Columbia's Doctor of Nursing Practice, family nurse practitioner program. She graduated with Honors in 2016. She has had a passion for dermatology for as long as she can remember.

Dani is a Doctor of Nursing Practice and a certified family nurse practitioner. She is a member of the American Academy of Nurse Practitioners, Sigma Theta Tau (International Nursing Honor Society), and the Heartland Advanced Practice Nurses Network. Dani and her husband Jacob, reside in Jackson where they enjoy being outdoors and active with their daughters and puppy. Aside from spending time with family and close friends, Dani enjoys interior design, traveling, working out, and reading. She looks forward to serving the patients of this community.

Jeanna Hull, Office Manager

Jeanna joined Advanced Dermatology in 2009, bringing with her over 10 years of managerial experience in the medical field. As the Practice Manager, Jeanna is responsible for the day-to-day operational management of the clinic on behalf of Dr. Moon and his associates. She wants to ensure a positive experience for each patient at Advanced Dermatology of Southeast Missouri.

Jeanna resides in Jackson with her husband Chris, where they enjoy spending time outdoors. Aside from her family and friends, she enjoys traveling, golf, and Mizzou Football.

What does it mean to be a board certified dermatologist?

A physician who is board certified has undergone rigorous education and training. A board certified dermatologist has the expertise, lifelong commitment to medical education, and training to provide quality dermatology care.

One must successfully complete:

  1. College earning a bachelor’s degree (typically 4 years)
  2. Medical School (4 years) to become a medical doctor (MD) or doctor of osteopathic medicine (DO)
  3. Internship, a 1 year required medical training after graduation from medical school
  4. An accredited dermatology residency program (at least 3 years)

After successfully completing the residency program, one can become a board-certified dermatologist by:

  1. Possessing a valid state medical license
  2. Passing the certification exams given by the American Board of Dermatology or the American Osteopathic Board of Dermatology.
  3. Complete various scheduled board certifying exams and continuing medical education every year.

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