Dr. William Mark Armstrong

October 9, 1946March 25, 2018

Dr. William Mark Armstrong, beloved husband, father, grandfather and physician, passed away on peacefully on March 25, 2018, after a lengthy and brave struggle with multiple myeloma. Dr. Armstrong was born October 9, 1946, in Cullman, Alabama, to Frances Oni Allgood and George Leroy Armstrong, the youngest of their three sons. He grew up surrounded by a large and loving extended family of Armstrong aunts, uncles and cousins in Scottsboro, Alabama, where he established many lifelong friendships. An accomplished high school basketball player, he won a scholarship to attend the University of the South in Sewanee, Tennessee, graduating cum laude in 1968. He went on to study medicine at the University of Alabama at Birmingham and relocated to Dallas in 1972 for his internship at the Veteran's Administration Hospital and his residency at Parkland Memorial Hospital, where he met his future wife, Dr. Nancy Stover Armstrong. Mark proposed within months of their first date. They were married in her hometown of Marfa, Texas, in 1973 and made their home in Dallas, where Mark entered the private practice of internal medicine. Mark and Nancy enjoyed an extremely happy and successful marriage and were devoted parents to their two daughters, Meredith and Melissa.

Apart from his family, nothing gave Mark more joy than taking care of his patients, which he did with compassion and quiet expertise. He was recognized by his peers as a leader in his field, being named a Fellow and then a Master of the American College of Physicians. He served as Governor of the North Texas Chapter of the ACP and was honored by the Texas ACP Chapter with the Chapter Laureate Award. The ACP awarded him the distinguished Ralph O. Claypoole Sr. Memorial Award for Devotion of a Career in Internal Medicine to the Care of Patients. He was a Clinical Professor of Internal Medicine at UT Southwestern Medical School, and Professor of Internal Medicine at Texas A&M College of Medicine. In addition to his private practice, he was heavily involved in the teaching program at Baylor University Medical Center, serving for many years as the Chief of the Division of General Internal Medicine and the John Binion Professor of General Internal Medicine, as well as directing the Outpatient Internal Medicine Resident Continuity Clinic for over 20 years. From 2001 onward, he served as the Associate Director of the Internal Medicine Residency Program at Baylor, helping to train a new generation of doctors and passing on his commitment to high quality patient care. His family will be forever grateful for the excellent care he received from the wonderful nurses and physicians at Baylor, many of whom were his former students and all of whom he was lucky to count among his friends.

In addition to his medical service, Mark was a dedicated member of Westminster Presbyterian Church, where he served as a deacon and an elder, where his daughters and all of his grandsons were baptized. Mark is survived by his wife Nancy; his daughter Meredith, her husband Brian Niles and their three sons William (named for his grandfather), Walter, and Alistair who live in London, England; and his daughter Melissa, her husband Steve Wilbur, and their son George, who live in Alexandria, Virginia; along with his brothers John Frank Armstrong of Albertville, Alabama, and George Leroy Armstrong, Jr. of Scottsboro, Alabama, and his many loving nieces and nephews and their families.

A visitation will be at Sparkman Hillcrest, Wednesday, March 28, from 6-8 pm. A celebration of Mark's life will be held at Westminster Presbyterian Church on Thursday, March 29, at 3:00 pm. In lieu of flowers, Mark's family asks that you consider making a donation to Westminster Presbyterian Church, 8200 Devonshire Drive, Dallas TX 75225, or the Medical Benevolence Foundation, Processing Center, PO Box 96877, Washington, D.C., 20090.


  • Visitation

    Wednesday, March 28, 2018

  • Celebration of Life

    Thursday, March 29, 2018


Dr. William Mark Armstrong

have a memory or condolence to add?

Verna Bargsley

April 28, 2018

Dr. Armstrong has been our “family physician” for around 45 years, dating from his early practice at Dallas Medical & Surgical Clinic. His name was given to my sister when she was in medical school at UTSA as one of their outstanding graduates. We needed a referral for my mother who had Alzheimer’s, and we had nowhere to turn. What a gift that was to us!

As it turned out, he cared for her, then for my dad who had difficulty coping with it, and later on for me and for my husband. Our 3-year-old children played in the waiting room just outside his office while I was helping my mom and dad; they will be 50 in August. He would always return my calls and guide me through this period of care giving with much patience and understanding.

Whatever he couldn’t “fix,” he found someone he knew and trusted who could, so that now we have a network of outstanding physicians. We are thankful, though, to him first of all who created this blanket of care. If he saw us anywhere at Baylor, he stopped to greet us because he was that kind of person: humble and kind, extremely smart but not condescending, knowledgeable in both the art and the science of medicine.

I want his family to know how much his care meant to us. May God grant him peace and rest.

Sandy Goodwin

April 16, 2018

Dr. Armstrong was my doctor for 30yrs.
He was more than a doctor to me! We shared our love of God and it meant the world to me. He was so kind and thoughtful and the best doctor I will ever know. We grew older together and I will forever miss him!
Bless him in heaven, Sandy Goodwin


April 5, 2018

About 1983 or so Mark became my doctor. At that time he had dark hair! My first memory is how easy he was to talk to about not just medical advice but about everything in life. As i grew older with him his insight and kindness never left him. He even took my wife and eventually my 2 sons on as patients. We all loved him and he will never be replaced in our hearts. Not only was he our Doctor, he felt like a friend to all of us. May he rest in peace. We all plan on seeing him again in heaven.

Martha Fielder

April 2, 2018

I am so sorry to hear of the passing of Dr. Armstrong. He was my doctor for decades going back to the building that Dr. Luecke was in. He was a wonderful physician and man. Always very helpful, and knew the solution. I enjoyed hearing him tell me about how he and his wife went to England to babysit the grandchildren. It was so obvious how much he dearly loved his family. He will be greatly missed, and he was very much loved. My condolences to each of you.

Heather Winslow

March 29, 2018

Dr. Armstrong was kind enough to allow me to do a summer internship with him. I fondly remember that experience and the many things he taught me. He was a wonderful man and a brilliant doctor!

Rick Illes

March 29, 2018

I knew Mark Armstrong as a physician, advocate, advisor, and, most of all, a cherished friend for over 23 years. His genuine concern for all his patients was obvious. His impact on those that were privileged to know him is hard to measure. His knowledge, experience, and empathy formed the perfect nexus of the complete physician.
He will be truly missed by everyone that understood his gift and passion for his calling.
Rick Illes

Sarah Brawner

March 28, 2018

My family will forever be indebted to Dr. Armstrong for the loving care he gave our mother. He was her doctor for many years and he took impeccable care of her.
I will always remember the sweet phone call we received from him the morning our mother died....always a true gentleman! Our prayers are with his family.

Timothy Lane

March 28, 2018

I got to know Mark as a fellow member of the ACP Governors Class 2009. Kindness, a quiet and remarkable intelligence, and a dry stealth sense of humor that never was critical of others but recognized the humanity in all, defined him My condolences to his wife and his extended family.
I am not surprised with the heartfelt testimonies of his acquaintances and patients.
Thank you, Mark,
Tim Lane, North Carolina ACP Governor 2009

David Paschal

March 28, 2018

I first met Mark Armstrong in the fall of 1964, when we were students at The University of the South in Sewanee, Tennessee. We became fast friends and remained friends for life. I was always impressed by Mark’s concern for others, his openness and intellect. He had all of the qualities that one would wish for in a friend.

In October 1973, my wife and I went to Mark and Nancy’s wedding in Marfa, Texas, and I happily served as a Groomsman. I have followed both Mark and Nancy’s medical careers and am not surprised by all the wonderful testaments to his success as a doctor. With his caring, intelligent, and humble manner, I have no doubt that he was an exceptional doctor.

I want to express my most sincere condolences and sympathies to Nancy and all of the family. Mark was always a true friend.

David Paschall
Lago Vista, Texas

Jamie Felton

March 28, 2018

I have never known a smarter, funnier, or kinder man. I'm fortunate to have called Mark my doctor and my friend for 38 years, and I am beyond grateful to have had him in my life.