The Future of Healthcare

Dr. “James” Pinckney believes that integrity and hard work are critical to building customer loyalty. A visionary, 

he founded Diamond Physicians in 2012, a membership medicine practice that focuses on the patient-physician relationship. This healthcare niche has gained momentum in response to sprawling waste and frustrations with healthcare delivery systems and is now known as Direct Primary Care. Diamond bypasses cumbersome and inefficient “middlemen” to deliver personalized, high-quality medical care directly to their valued clients. 

Diamond has expanded into four companies and incorporated Diamond Health in 2018 to solidify his vision of transforming healthcare delivery in America. Diamond Health is the parent company of Diamond Physicians, DrLink a HIPAA complaint telemedicine technology company, Diamond Ventures (investment arm) and Diamond Health MSO consulting firm. 

Prior to founding Diamond, Dr. James studied general surgery at the prestigious Cedars-Sinai Medical Center in Los Angeles after graduating from Baylor College of Medicine in Houston. He switched from general surgery to family medicine in order to pursue his dream of developing a free market primary care system. Dr. James completed his training in family medicine at Methodist Charlton Medical Center in Dallas. He is a board-certified family physician licensed in the states of Texas and California. 

Dr. James endorses a holistic approach to medicine and incorporates nutrition and fitness into the lifestyle of his clients. This well-rounded conviction was influenced by Dr. James’ undergraduate liberal arts education at Wake Forest University, which also led him towards medical journalism. Dr. James joined the revolutionary national television program Chasing the Cure Live with Ann Curry as a medical host in 2019. The opportunity to help solve the most challenging medical mysteries of his career and shed light on healthcare disparity has helped him become a better doctor, and more importantly a better person. 

Dr. James also holds a United States patent for an innovative surgical gown which he developed while in medical school. He has received accolades from the Jackie Robinson Foundation and Super Doctors recognizing him as a top leader in the country, as well as D CEO’s Excellence in Healthcare Award for outstanding healthcare practitioner in 2019. Dr. James routinely appears on nationally syndicated radio and news programs as a medical expert. 

When he isn’t tending to the needs of his clients, appearing on Chasing the Cure or presenting medical topics to the media, Dr. James enjoys spending quality time with his wife Quiana, son James III, daughter Autumn, playing golf, attending sporting events, and civic philanthropic ventures. 

Professional Associations & Affiliations 

Equinox National Healthcare Advisory Board Jackie Robinson Foundation Scholar Selection Committee Michael Finley Foundation Board Member American Academy of Family Physicians 

Honors, Awards & Achievements 

Baylor College of Medicine Merit Scholar (2004-2008)

Reflective Surgical Gown Patent No: US 7,627,908 B1 (December 8, 2009)

Project Access Dallas: Compassionate Care for Our Community’s Uninsured Award (2011) 

Dallas Observer: Future Leaders of Dallas (2011)

Jackie Robinson Foundation “42 Under 40” National Award (2014) 

Super Doctors Texas Rising Stars (2015, 2016, 2017, 2018) 

D CEO Excellence in Healthcare: Outstanding Healthcare Practitioner (2019) 

Top Doctors (2015, 2019) 

Critic’s Choice Award: Best Live Show – Chasing the Cure (2020)

Mr. Pinckney is a high-capacity executive who has over 30 years of broad business expertise in executive management, sales, operations, marketing, business strategy & planning, project management, consulting, and software development. Throughout his career, Mr. Pinckney has been relied upon to see the “big picture”: To define, plan, and execute strategy and to build and lead productive business units and teams. He holds a bachelor’s degree in Computer Science from the University of South Carolina and completed an Executive MBA Program at the University of Michigan.

Mr. Pinckney has served as Chief Operating Officer for Diamond Health for over a decade, initially in an advisory position. Over recent years, he has dedicated his full-time attention and focus on Business Strategy & Growth, Superior Client / Patient Experiences and Talent Development for Diamond’s concierge medical practice. His passion for excellence in providing exceptional services leveraging technology innovation and working with highly talented medical professionals is foundational to deliver unparalleled healthcare to Diamond’s patients.

Over Mr. Pinckney’s career, he served in various corporate executive roles in helping companies drive business growth via Sales and Operations excellence. He worked for Fortune 500 companies including Microsoft where he spent 10 years, Lenovo, Sabre, and Hitachi Data Systems. For a period in his career, he pursued entrepreneurial interest between serving in executive positions with companies like Outerwall and Spiceworks.

Mr. Pinckney started two businesses, J&J Pinckney Group, LLC and J&J Renaissance, LLC. The J&J Pinckney Group company developed Jimmy John’s franchises. After four double-digit growth years, he sold this successful franchise business in December 2015. J&J Renaissance, LLC entity continues to focus on providing business strategy, management, sales, and operational consulting services to growth-oriented businesses.

At Spiceworks, Mr. Pinckney served as Senior Vice President, Revenue (Chief Revenue Officer) providing executive leadership to drive sales and delivery operations execution with focus on revenue growth and profitably in a declining business. Functional areas of responsibility included: Sales, Sales Operations, Market Strategy and Insights, Client Success, and Campaign Delivery teams. Mr. Pinckney overall focus was to help position the company for sustained growth seeking toward an IPO or Sale, resulting in the sale of Spiceworks. He transformed the Revenue Organization to one of execution and results orientation on business performance, while establishing a culture of open communications and accountability operating as “One Team”.

While at Outerwall, Mr. Pinckney served initially as the Corporate Leader, Strategy and Operations and then quickly became the Chief Strategy, Sales and Services Officer. He provided executive leadership to drive strategy and execution across enterprise-wide disciplines to maximize operational effectiveness and efficiency, while delivering sales and services excellence. His breadth of responsibility included: Strategy & Planning, Sales, Business Operations & Services, Customer Support; and Corporate Brand & Communications. He led the team responsible for driving Outerwall’s $2.4B sales revenue. He was a key leader in the successful integration of ecoATM’s acquisition into Outerwall.

He enjoys golfing, tennis and spending time with his inspiring wife, JoElla. He has a passion for family and particularly his two grandchildren, James III and Autumn. Additionally, he serves on several charitable boards as well as writing a book on Leadership.

Dr. Omar Durani has a strong passion to help his patients achieve optimal health with a focus on preventive medicine and wellness. With his concierge medical membership at Diamond Health, Dr. Durani focuses on overall longevity with optimized health.  He believes this can only begin with listening to his patients and building a trusting relationship to provide elite personalized medical care. Dr. Durani looks to help fill the gaps of traditional medicine practice and shift from a reactive to proactive health care plan.

Dr. Durani has been recognized as one of the Best Doctors in Dallas by his peers for numerous years. Emphasizing prevention in setting of an approach that entails whole mind, body and spirit allowing for an in-depth holistic treatments plan to help achieve health goals. Dr. Durani has expertise in diabetes, hypertension, thyroid disorders, lipid-cholesterol, anxiety-depression, and obesity management. Additionally, he is experienced in reversing metabolic disorders and assessing cardiovascular risk, aging, and hormone optimization. Dr. Durani takes pride in incorporating integrative and functional medicine approaches to help identify possible root causes for chronic or recurrent health ailments. Dr. Durani proactively helps his clients coordinate care with the top specialists to ensure no details are missed and be an advocate and help guide his clients through the convoluted healthcare system and overall health journey.  

Dr. Durani lends his medical knowledge to his community as a volunteer for a non-profit medical clinic providing medical examinations and visits for the underserved in Dallas who do not have access to healthcare. Dr. Durani is also a volunteer with Delete Blood Cancer (DKMS), Leukemia & Lymphoma Society and Children’s Medical Center with a passion about raising awareness for childhood cancer research, particularly childhood leukemia and the national bone marrow registry. 

Born and raised in North Texas, Dr. Durani and his wife Henna reside in Frisco, Texas with their two daughters Kenza and Noura and their son Kareem. Dr. Durani is an avid sports enthusiast enjoying basketball and golf.  

He is a lifelong Dallas Cowboys and Mavericks fan and self-proclaimed trivia guru.

Undergraduate & Medical School

Southern Methodist University, Bachelor of Science Biology (with honors)

St. George’s University, Doctor of Medicine 

Residency

University of Texas at Southwestern

Parkland Memorial Hospital

Professional Associations & Affiliations

American Academy of Family Physicians

American Board of Family Medicine

Texas Academy of Family Physicians

Texas Medical Association

American Medical Association

Dallas County Medical Society

Honors, Awards & Achievements 

UT Southwestern Chief Resident (2014-2015)

Golden Pager Award for Excellence in Patient Care (2015)

Super Doctors Texas Rising Stars (2019, 2020)

Best Doctors in Collin County (2018)

D Magazine’s Best Doctors (2017, 2018, 2019, 2021)

Dr. Leann Silhan graduated from UT Southwestern Medical School in 2006 and completed her residency in internal medicine at University of Maryland Medical Center. She was chief resident in internal medicine from 2009-2010 and then completed her fellowship in pulmonary and critical care at University of Maryland and Shock Trauma Center, where she served as the chief fellow during her final year. She accepted a position on faculty at Johns Hopkins School of Medicine, where she worked as part of the interstitial lung disease team as a subspecialist, performed research in pulmonary fibrosis and telomerase, and was faculty and attending physician of the lung transplantation program and selection committee. From 2015-2017, she was the pulmonary and critical care division’s director of education. She moved to Dallas in 2017 to join the pulmonary and critical care faculty at UT Southwestern. Her self-pursued education in functional medicine, which began in 2016, led her to leave academic medicine to practice medicine with a more holistic approach. 

Dr. Leann Silhan joined the Diamond Health team in April 2020 after an 8-year career in academic medicine in pulmonary and critical care.  She began studying functional medicine about 5 years ago and integrated it into her practice.  She believes that every person’s health is unique, their health struggles have individual needs and need an individualized treatment approach. Dr. Silhan enjoys working with her patients as a team and coming up with solutions that work for them, weaving natural and holistic medicine with conventional treatment when appropriate.   She considers her practice an integration of internal medicine, pulmonary and functional and integrative medicine.  

Dr. Silhan has written numerous papers on topics including genetics, interstitial lung disease, lung transplantation, and health and wellness.  She has been a guest speaker numerous times for groups including Pulmonary Fibrosis Warriors, The Scleroderma Foundation, American Thoracic Society, The Institute of Functional Medicine, and American Board of Internal Medicine.  She is triple board certified in Internal Medicine, Pulmonary, and Critical Care Medicine.

Outside of work, Dr. Silhan enjoys spending time with her husband and three young daughters, gardening, and being outdoors.

Medical School

UT Southwestern Medical School (2006)

Residency

University of Maryland School of Medicine, Internal Medicine (2009)

University of Maryland School of Medicine, Chief Resident, Internal Medicine (2010)

Fellowship

University of Maryland School of Medicine, Pulmonary Diseases & Critical Care Medicine (2013)

Professional Associations & Affiliations

American Thoracic Society

Honors, Awards & Achievements

Gold Pin Award for Excellence of Patient Service & Care (2006)

Veterans Affairs Gold Pin Award for Excellence in Patient Care (2006)

Fellow Teacher of the Year (2012)

Fellow Track Symposium Award (2013)

Johns Hopkins University Pulmonary and Critical Care Medicine Fellows Teaching Award (2015)

Faculty Teacher of the Year (2015)

Dr. Thanh Tran graduated from UT Southwestern (UTSW) Medical School in 2010 and completed her residency in Internal Medicine at UTSW in 2013. While in residency, she became interested in hepatology research. She has done multiple research projects in gastroenterology and hepatology with Dr. Don Rockey and Dr. William Lee. After her residency, she joined UTSW and Parkland Hospital as a faculty and Assistant Professor in Hospital Medicine. She completed an Executive MBA in Healthcare Organization Leadership from the University of Texas in Dallas in 2018. From 2019 to 2021, she served as Medical Director of Clinical Operations for the Division of Hospital Medicine at Parkland Hospital. During her academic medical career, she published articles about liver diseases and presented at national conferences about hospital clinical operations.

Dr. Thanh Tran has expertise in diabetes, hypertension, and advanced cardiac and liver diseases. After a 9-year career in academic hospital medicine, Dr. Thanh Tran joined the Diamond Health team in January 2023 with a strong desire to focus on preventative medicine, building relationships with patients, and promoting wellness. She brings a passion for medicine and helping patients reach their best health.

Dr. Thanh Tran was born in Can Tho, Vietnam but has lived in Texas for over thirty years. She lives with her husband and daughter in Frisco, Texas. She enjoys cooking, traveling, gardening, and reading on her days off.

College

Baylor University (2006)

Medical School

University of Texas Southwestern Medical School (2010)

Residency

University of Texas Southwestern Medical School (2013)

Executive MBA – Healthcare Organization

University of Texas (2018)

Professional Associations & Affiliations

American College of Physician

Society of Hospital Medicine

Honors, Awards & Achievements

Nominee for Medical Student Teaching Award – UTSW (2006)

Dr. Johnston is board certified by the American Board of Internal Medicine. He graduated from Texas Tech University School of Medicine and later received the Distinguished Alumnus award. He completed his residency in internal medicine at Austin Brackenridge Hospital. Dr. Johnston began his practice in Dallas with his father and later started his own group in Las Colinas. In 2006, the group was acquired by the Medical Clinic of North Texas (MCNT), a multispecialty group that was mostly composed of primary care physicians that grew to over 200 providers. He became president of MCNT and served in that capacity until the 2012 merger that created USMD Health System.

In 2016 USMD became a part of OptumCare, where Dr. Johnston served as Executive VP and Chief Physician Officer. He became Chief Executive Officer and Chief Physician Officer of USMD in 2017. Also, he served on the Optum Physician Executive Council and received the Optum Distinguished Physician designation. Dr. Johnston left Optum and his practice in 2022, and joined Theo Transformation Advisory in 2023 as a senior advisor working with leadership of health systems.

Dr. Johnston has recently joined the Diamond Health team in 2024 with a strong desire to focus on preventative medicine, building lasting relationships with patients, and promoting wellness. He brings a deep passion for medicine and helping patients reach their best long-term health.

Dr. Johnston resides in Las Colinas and has practiced medicine for over 40 years. His other interests include travel and tropical medicine and teaching. Dr. Johnston and his wife Kathy have three children and seven grandchildren. He enjoys spending his free time with family, as well as cycling, kayaking and golf. He also actively participates in international medical mission work in the Dominican Republic and Honduras.

Medical School

Texas Tech University School of Medicine – Internal Medicine

Residency

Austin Brackenridge Hospital

Fellowship

Fellowship in American College Physicians

Professional Associations & Affiliations

American College of Physicians​​​​

Honors, Awards & Achievements

Distinguished Alumnus Award, Texas Tech University School of Medicine

Optum Distinguished Physician Designation, OptumCare ​

Dr. Gavin Wolff was born and raised nearby in Ennis, Texas. He served in the United States Navy onboard a nuclear submarine as a chemist and performed radiological controls for the ship’s reactor. During his military tenure, Dr. Wolff received many individual awards including the Lone Sailor Award, Commanding Officer’s Personal Excellence Award, and the Navy and Marine Corps Achievement Medal. Following his six years of service in the Navy, Dr. Wolff worked as a chemist at a chemical plant until he began Chiropractic school.

He wanted to take his experiential knowledge in engineering and chemistry and apply it to helping people.

Dr. Wolff attended the prestigious Parker University and received his doctorate in chiropractic, bachelor’s in anatomy, and a bachelor’s in health and wellness in 2014. He has spent countless hours going above and beyond to research the most effective tools and techniques to provide improvement for his patients. He has advanced training in many chiropractic adjustment techniques and is advanced certified in the Activator protocol. Dr. Wolff seeks to reduce pain and discomfort through manipulation and adjustment of the spine treating conditions including sciatica, neck pain, arthritis pain, among many others. Dr. Wolff specializes in preventing, diagnosing, and treating conditions associated with the neuromusculoskeletal system, while improving each patient’s functionality and quality of life. Also, Dr. Wolff offers incredible revolutionary nutritional counseling and weight loss programs.

Dr. Wolff has worked for the North Texas VA Hospital, has been a certified Designated Doctor for the state of Texas and a consultant for several private clinics. He proudly joined the Diamond team in September of 2022 and is most excited to work alongside premier physicians for the benefit of the patient. As his patient, you will receive complete and thorough care through Dr. Wolff’s personal investment in you.

Dr. Wolff and his wife, a dentist, have two daughters and a newborn son. He and his family are members of First Baptist Dallas Church in downtown Dallas. Dr. Wolff welcomes the opportunity to serve you and your families’ healthcare and chiropractic needs.

College & Medical School

Parker University (2014 Graduate)

Professional Associations & Affiliations

Activator Protocol Certification

Honors, Awards & Achievements

Lone Sailor Award (US Navy)

Commanding Officer’s Personal Excellence Award (US Navy)

The Navy and Marine Corps Achievement Medal (US Navy)

Donna’s specialty is perspective. With courtroom experience in both state and federal court, Donna built her reputation by offering clients strategies that not only benefit them now but help them secure a future of growth. Donna travels to Washington, D.C. frequently to assist with healthcare lobbying efforts and meet with congressional members about those issues affecting Direct Primary Care. Donna has served as Counsel at several healthcare companies where she focused on compliance, contracts, data privacy, and risk management. Donna was Supervising Attorney at Barrett Daffin Frappier Turner & Engel, LLP where she focused her litigation practice on default financial transactions while representing large private and public banks, investors, and mortgage brokers. Originally from North Carolina, Donna moved to Dallas after graduating from law school in 2012. Donna earned her law degree from North Carolina Central and completed her undergraduate studies at Elon University.