William Posten, MD William Posten, MD Faculty Dr. William Posten is a board-certified, fellowship trained Mohs Surgeon practicing in Dallas, Texas. He received his bachelor’s degree with honors from Harvard University and his M.D. degree from Yale University. He did his dermatology residency training at Northwestern University. He then completed a combined fellowship in Mohs Surgery and Procedural Dermatology at University of Texas Southwestern. Dr. Posten currently serves as President of the Dallas Ft Worth Dermatological Society. He previously served as Secretary-Treasurer of this prestigious organization. He is a Diplomate of the American Board of Dermatology, a Fellow of both the American College of Mohs Surgery and the American Academy of Dermatology, and a member of the American Society of Dermatological Surgery. Dr. Posten authors original research on novel surgical techniques and his findings are regularly presented in national surgical meetings. Recently, Dr. Posten has been featured on Top Docs of DFW, a television program highlighting the leading physicians of Dallas Ft-Worth show on channel 33 KDAF-TV. Dr. Posten is on medical staff at Medical Cities Hospital of Dallas, Presbyterian Hospital of Dallas, Baylor Hospital of Irving, and Zale Lipshy Hospital of Dallas. He teaches medical students and residents surgical skills at UT Southwestern Hospital, Parkland Hospital and the Dallas Veterans Affairs Hospital. Dr. Posten specializes in the treatment of skin cancers and other skin tumors. Dr. Posten believes in a compassionate, caring philosophy that is reflected in the clinical care that he provides. His hobbies include painting and sculpture. He is married with 2 children. He looks forward to meeting you at the Dallas, Las Colinas, and Highland Village offices. PS Winter Home

Brion Hurley < Back Brion Hurley Faculty Mr. Brion Hurley is an independent Lean Six Sigma consultant helping organizations save money, improve quality and safety, mitigate risks, and enhance operational flow. My approach leads to higher employee, customer, and stakeholder satisfaction. Proven ROI: Organizations that apply Lean Six Sigma through improvement projects can recoup their training costs in under 3 months! With 25+ years of experience working in Aerospace, Food and Beverage, Healthcare, Automotive, Logistics and the Nonprofit sectors, I’ve helped organizations achieve the Triple Bottom Line (People, Planet, and Profit) by integrating process excellence with sustainability. Brion is also the author of "Lean Six Sigma for Good" and editor of "Lean Six Sigma for Good: Lessons from the Gemba," sharing insights on using improvement principles for social and environmental impact. Vision: To establish volunteer Lean and Six Sigma consulting support for nonprofits and NGOs in every city worldwide. Passions & Focus Areas: Clean Air and Water Zero Waste & Food Waste Reduction Vegan & Sustainable Lifestyles Solar Energy & Renewable Solutions PS Home

Aaron Farberg, MD < Back Aaron Farberg, MD Faculty Aaron S. Farberg, M.D. is a double board-certified dermatologist and fellowship-trained Mohs surgeon that specializes in skin cancer, inflammatory diseases, and cosmetic dermatology. Dr. Farberg is a summa cum laude graduate of Emory University and continued his education at the University of Michigan, where he received his medical degree. Dr. Farberg’s post-graduate training includes additional residency years at the University of Michigan in Plastic and Reconstructive Surgery and, in New York, as a clinical research fellow in association with the National Society for Cutaneous Medicine and New York University. He then remained in New York, completing another residency in Dermatology at the Icahn School of Medicine at Mount Sinai Hospital, where he served as chief resident. In addition to treating patients, Dr. Farberg has been a clinical investigator on numerous studies, including FDA clinical trials. He is an accomplished author and has published over 100 articles in professional medical journals. He serves as a member of the editorial board for several medical journals including Dermatology & Therapy and SKIN. Dr. Farberg also founded the Dermatology Science and Research Foundation to provide dermatology education to his patients and peers. Dr. Farberg has been recognized as one of Dallas’s leading dermatologists with numerous awards and honors. He most recently was ranked by his dermatology colleagues in Newsweek Magazine as the #1 medical dermatologist in Texas and #6 in the entire country. While in New York he served as a consultant dermatologist for the New York Yankees. PS Home

Business 201 Faculty < Back Mark Spalding Executive Wealth Manager For two decades, Mark has advised high net worth individuals and families experiencing a variety of financial issues including divorce, business sales, retirement planning, and inheritance. Mark brings to FPA his extensive experience providing financial and wealth management advice, which in many cases includes wealth preservation and income strategies as the cornerstone of the portfolio design and construction. He takes special care to tailor each portfolio to meet the unique requirements, specific goals and objectives, and stated risk tolerance of each client. Mark is regularly engaged by other professional advisors, CPAs, and attorneys whose clients require financial advice on such matters as property division recommendations, tax and wealth preservation strategies, and asset allocation recommendations. Mark transitioned into being a financial advisor after many years of practicing law. In that role, he regularly worked with clients experiencing large financial transactions, noting that the all too frequent lack of effective planning for major life events left many legal clients bereft of their financial goals. Mark’s legal expertise enhances his financial advice and adds a layer of comfort to clients facing complex financial issues. By applying a proper balance of both disciplines, he more ably helps clients plan for their futures and build portfolios that account for taxes and estate planning laws. Outside of work, Mark enjoys spending time with his wife and three children. He’s served on the boards of several non-profit organizations focused on veterans and children. He is an avid athlete, having played college football at UCLA, but he has since replaced his cleats with snowboard boots, golf clubs, and a fishing pole. Mark is a former Marine Corps officer who deeply values integrity, honesty, and loyalty in his relationships. http://www.finplaninfo.com Business201 Home

Barak Richman < Back Barak Richman Faculty Barak Richman’s primary research interests include the economics of contracting, new institutional economics, antitrust, and healthcare policy. His work has been published in the Columbia Law Review , the University of Pennsylvania Law Review , Law and Social Inquiry , the New England Journal of Medicine, the Journal of the American Medical Association , and Health Affairs . In 2006, he co-edited with Clark Havighurst a symposium volume of Law and Contemporary Problems entitled "Who Pays? Who Benefits? Distributional Issues in Health Care,” and his book Stateless Commerce was published by Harvard University Press in 2017. Professor Richman represented the NFL Coaches Association in an amicus curiae brief in American Needle v. The Nat’l Football League , which was argued before the U.S. Supreme Court in January 2010 and again in Brady v. The Nat’l Football League in 2011. His recent work challenging illegal practices by Rabbinical Associations was featured in the New York Times . And in 2020, he was a member of the Working Group on Platform Scale at Stanford University’s Program on Democracy and the Internet that proposed middleware as a solution to stem the economic and political power of dominant internet platforms. Professor Richman also is on the Health Sector Management faculty at Duke’s Fuqua School of Business and is a Senior Fellow at the Kenan Institute for Ethics. He won Duke Law School's Blueprint Award in 2005 and was named Teacher of the Year in 2010. He has had visiting appointments at Columbia, Harvard, and Stanford. Professor Richman has an AB, magna cum laude , from Brown University, a JD, magna cum laude , from Harvard Law School, and a PhD from the University of California, Berkeley, where he studied under Nobel Laureate in Economics Oliver Williamson. He served as a law clerk to Judge Bruce M. Selya of the United States Court of Appeals for the First Circuit, and from 1994-1996 he handled international trade legislation as a staff member of the United States Senate Committee on Finance, then chaired by Senator Daniel Patrick Moynihan. PS Home

Nnenna Agim, MD < Back Nnenna Agim, MD Faculty Nnenna Agim, MD is an experienced dermatologist board certified in both general and pediatric dermatology by the American Board of Dermatology. She graduated summa cum laude from the University of Houston with a Bachelor of Science in Biology and minor in Psychology following which she trained in Medicine at the University of Texas Southwestern Medical School in Dallas, TX. She stayed on for an internship in Internal Medicine at Parkland Hospital before completing Dermatology residency training at The University of Texas Southwestern Medical Center, serving as a chief resident. She returned to Houston to complete a Pediatric Dermatology fellowship with Baylor College of Medicine at the world-famous Texas Children’s Hospital, following which she returned to Dallas to build a Pediatric Dermatology Practice and Program. A former Associate Professor of Dermatology, Division Chief and Program Director at the University of Texas Southwestern Dallas and Children’s Hospital Dallas, she served for over twelve years caring for patients and creating educational programs for medical students and residents, including the establishment of a fellowship program which graduated other successful Pediatric Dermatologists now practicing within and outside the United States. Over the years, she has lectured locally, regionally and nationally. Her authorship in these areas of expertise is extensive and she has been fortunate to write, review or edit manuscripts for many of the major medical and dermatology journals: Pediatric Dermatology, Pediatrics, Journal of the American Academy of Dermatology, JAMA Dermatology, etc., textbooks, popular reference resources like VisualDx, and patient directed articles on preventive health. She is quite honored to have been selected by peers as a Top Doctor/Pediatric Specialist in Dallas for the last 7 consecutive years and a Super Doctor of Texas for the past five years. Following the closure of the clinic at Children’s Health Dallas, she joined North Texas Dermatology Associates. A lifelong learner and professed medical sleuth, all aspects of dermatology, especially pediatric dermatology, education of families, creative solutions for common and complex problems, and telemedicine comprise her professional interests. Outside of work, you can find her chasing after three very active boys, in the garden, or singing and dancing somewhere she hopes no one is watching. PS Home

Stan Tolkachjov, MD Stan Tolkachjov, MD Faculty Dr. Stan Tolkachjov is a double board-certified dermatologist and fellowship-trained Mohs micrographic surgeon with interests in skin cancers, Mohs surgery & complex facial reconstruction , pyoderma gangrenosum , neutrophilic dermatoses, cosmetics, and hair disorders & restoration. He is the Dallas-Fort Worth area Director of Mohs Micrographic & Reconstructive Surgery for Epiphany and has performed over 20,000 cases. He’s the Founder and Director of the ACGME-accredited Micrographic Surgery and Dermatologic Oncology Fellowship and Core Dermatology Residency Faculty at Baylor University Medical Center. He’s a Clinical Assistant Professor of Dermatology at UT Southwestern, Clinical Associate Professor at Texas A&M College of Medicine, and a Staff Dermatologic Surgeon at the Dallas VA Medical Center, serving our veterans. He’s also the current President of the Dallas Dermatological Society. He graduated from Emory University with a degree in Neuroscience and Behavioral Biology where he was on the varsity track and field team and played rugby. He then attended University of Tennessee College of Medicine graduating first in his class of 159 medical students where he was elected to the professionalism committee for 4 years, an AMA representative, president of the Student Surgical Society, and a member of the prestigious Alpha Omega Alpha honor society followed by a rigorous transitional year internship at the Methodist University Hospital at the University of Tennessee with a combined focus on medicine and surgery. He completed his residency at the world-renowned Mayo Clinic in Rochester, Minnesota, at which time it was ranked the #1 hospital in the world by U.S. News & World Report . He did a formal Mohs Micrographic Surgery and Dermatologic Oncology Fellowship at the Surgical Dermatology Group in Birmingham, Alabama, focusing on Mohs surgery and reconstruction, where he also practiced for the first few years of his career. Dr. Tolkachjov’s involvement in education and research/clinical trials has facilitated over 175 publications in major medical journals such as the Journal of the American Academy of Dermatology (JAAD) , Mayo Clinic Proceedings , Dermatologic Surgery , Journal of Investigative Dermatology , British Journal of Dermatology , International Journal of Dermatology , Journal of Drugs in Dermatology , Journal of Oral and Maxillofacial Surgery, Lasers in Surgery and Medicine, Dermatologic Clinics, Anais Brasileiros De Dermatologia, Orphanet Journal of Rare Disorders, and Pediatric Dermatology , amongst others. He has contributed chapters to several books with an international audience and has authored and edited 2 textbooks on Mohs surgery and complex facial reconstructive techniques, which include distinguished international panel of contributing authors. He has also edited 2 editions of Dermatologic Clinics . He continues to teach students, residents, and fellows with various speaking engagements nationally and internationally including venues such as New York, Amsterdam, Manila, Milan, Copenhagen, Manchester, Greece, Moscow, Taiwan, Geneva, Kuala Lumpur, Brazil, Berlin, and Vancouver, amongst others. He was also voted as Teacher of the Year by the dermatology residents at UT Southwestern in Dallas and Physician of the Year by Epiphany Dermatology in 2021. As a leader in the field of dermatology and Mohs surgery, he is an active member, frequent lecturer, and holds committee positions in the: American Academy of Dermatology (AAD) American College of Mohs Surgery (ACMS) American Society of Dermatologic Surgery (ASDS) European Academy of Dermatology and Venereology (EADV) International Society for Dermatologic and Aesthetic Surgery (ISDS) American Society for Laser Medicine & Surgery (ASLMS) California Society of Facial Plastic Surgery (CSFPS) O’Leary Society (Mayo Clinic Dermatology Alumni) European Society for Micrographic Surgery (ESMS) Skin Cancer Outcomes Consortium (SCOUT) Consortium for Harmonizing Outcomes Research in Dermatology (CHORD) Committees on which he has or is currently serving include: Mohs Appropriate Use Criteria (AAD) Mohs Micrographic Surgery Committee (AAD) Dallas Dermatological Society – President World Congress Fund Review Task Force (AAD) Former Chair of the Communications & Public Relations Committee (ACMS) Professional Conduct Committee (ASDS) Awards Work Group (ASDS) Journal Awards Work Group (ASDS) Journal of the AAD (JAAD) Editorial Mentorship Program (AAD) Communications & Public Relations Committee (ACMS) IDEA (innovation/development/evaluation/assessment) panel (AAD) Section of Hospital Dermatology Committee (Mayo Clinic Dept. of Dermatology) O’Leary Society Board of Directors – Mayo Clinic Dermatology Alumni Association Dr. Tolkachjov has done additional training with experts in the aesthetic field for fillers, neurotoxins, KYBELLA®, chemical peels, and lasers. When approaching a cosmetic patient, he strives for a natural and subtle appearance and treats each patient’s unique concerns while obeying anatomical symmetry and complementing the natural features of each individual. With cosmetics, he takes a conservative approach that fits a patient’s desired goals and budget. He’s one of around 50 physicians in the country trained on implantation of SCENESSE® for the treatment of erythropoietic protoporphyria. In his spare time, Dr. Tolkachjov enjoys coaching sports, trivia, travel, and spending time with his wife, two children and dog, Bella. His easygoing demeanor, outgoing personality, and enthusiasm for patient contributes to the welcoming environment of his dedicated team while his meticulous approach and precision allows for the highest cure rates and excellent aesthetic reconstructive outcomes. PS Winter Home

Dermpath On Demand is an online educational website for all things dermatopathology. Join Dr. Clay Cockerell in the library 24/7/365 to view eSlides and case review videos. 4th Wednesday Case Review hosted by Clay Cockerell, MD, MBA, JD DOD Home Join Clay Cockerell at the virtual microscope to review interesting dermatopathology cases. eSlide Example | Actual slides can be viewed fullscreen. Lecture Example When: 4th Wednesday of Each Month Time: 7:00 AM CT Duration: Each lecture lasts approximately 45-60 minutes. Sign Up: Gain access to eSlides and Zoom 4th Wednesday Sign Up

Warren Piette, MD < Back Warren Piette, MD Faculty Chair, Division of Dermatology Stroger Hospital of Cook County Professor Department of Dermatology, Rush Dr. Warren Piette is a dermatologist in Chicago, Illinois, and is affiliated with multiple hospitals in the area, including John H. Stroger Jr. Hospital of Cook County and Rush University Medical Center. He received his medical degree from the University of Texas Southwestern Medical School. Dr. Piette is board-certified in internal medicine, hematology, and dermatology. He has been in practice for 35 years. PS Home

Melissa Costner, MD < Back Melissa Costner, MD Faculty A Texas native, Dr. Melissa Costner began her journey as a Dermatologist at UT Southwestern Medical Center, where she completed her training as a resident in dermatology, and where she developed an early and enduring interest in the skin manifestations of autoimmune disease. Under the tutelage of Dr. Richard Sontheimer, an icon of dermatology, she honed the special skills needed to take effective care of patients with conditions such as lupus dermatomyositis and scleroderma. After graduation from her residency, Dr. Costner joined the faculty at UT Southwestern in 1997 and quickly established a reputation as a specialist in the skin manifestations of rheumatic diseases. She went on to write book chapters, contributed to research, published new findings, and participated in the development of clinical guidelines for dermatologic manifestations of rheumatologist disease. She is one of the founding members of the Rheumatologic Dermatology Society. In 2007, Dr. Costner further expanded the scope of her influence on the Dallas community by entering private practice, developing collaborative care pathways with the DFW metroplex physicians for the care of patients with autoimmune diseases, including psoriasis and eczema. Dr. Costner also supports a number of general and specialty physicians with her expertise in skin manifestations of several other general and specialty diseases. PS Home

Business 201 Faculty < Back Michael Smith Regional Business Development Officer Coming soon. Business201 Home

Laura Ferris, MD, PhD < Back Laura Ferris, MD, PhD Faculty Clinical Interests Adult Dermatology Special Interests Pigmented Lesion and Melanoma Psoriasis Board Certification Dermatology Education: Doctor of MedicineUniversity of Maryland, Baltimore, MD Doctor of PhilosophyJohns Hopkins Medical School, Baltimore, MD Training Cutaneous Oncology & Clinical Research Fellowship | University of Pittsburgh, Pittsburgh, PA Dermatology Residency | University of Pittsburgh, Pittsburgh, PA Medicine Internship | University of Pittsburgh, Pittsburgh, PA PS Home