Galleria (214) 238-6270 | Park Cities (214) 238-6440

Meet our Physicians

Higher Standards of Care Require Higher Standards of Excellence.

Our physicians are all board-certified, which means they have achieved the level of knowledge, experience, and dedication needed to bring our patients the quality of care they deserve. At Advance ER, our physicians work together to provide the consistency of care that sets us apart from other emergency rooms and urgent care facilities. Our cooperative includes specialists, available through SpecialistsNOW℠, who are on-call for special consultations.


Thomas Allen, M.D., FACEP

I have always loved science and helping people, so becoming a doctor was a perfect choice for me. I did my medical school training at Oregon Health and Science Center (OSHU). I came back to Texas to be near family and complete my residency in emergency medicine at the University of Texas at Herman Hospital. Since graduation, I have spent the majority of my 20 years’ experience working in major trauma centers. I have been a medical director for a Level 2 Trauma Center and also spent 10 years as a medical director for an air ambulance service. I love everything emergency medicine, but also love hiking, fishing and going to Mavericks games with my wife and 9-year-old daughter.

Ron Bryce, M.D.

For me, becoming a doctor seemed to be my natural path. I love people, problem-solving and I’m calm under extreme pressure. I received my medical degree from Oral Roberts University School of Medicine, Tulsa, OK, and then completed my residency at John P. Smith Hospital in Fort Worth, TX. I serve on the board of directors for several charitable organizations providing relief in Third World countries. My wife and I have four children. I enjoy spending time with my family as well as reading, writing and playing piano.

Michael Chiang, M.D.

Being a doctor is a fulfillment of a lifelong dream. I’ve wanted to be a physician ever since I was a kid. I spent time as a Hoosier and worked on my basketball skills while getting my medical degree from Indiana University School of Medicine and then I completed my residency training from UCLA School of Medicine. I enjoy the challenges of emergency medicine and helping people with urgent medical needs at Advance ER. Prior to that, I was Chief of Emergency Medicine at The Heart Hospital at Baylor Plano. Being an active part of my community, I enjoy serving on several different boards. Along with English, I am fluent in Chinese.

James Alan Dennington, M.D.

I’m a Texan through and through. I received my medical degree from the University of Texas Southwestern Medical Center in Dallas and I have worked in several different Texas hospital emergency rooms before coming to Advance ER. I live in Southlake with my lovely wife, Kristina, and our three young children who keep us busy with sports, music and church events. I’ve been to Africa for three medical missions trips where I was able to help people who don’t have easy medical access. For fun, I enjoy playing guitar. I’ve also co-authored a humorous book, “Best Seller,” just to keep things light.

Brian King, M.D.

Born and raised in the Houston/Dallas area, I’ve been practicing medicine in Texas for two decades. I was graduated from the University of Texas Southwestern Medical School and completed my residency in emergency medicine at Wake Forest University, Winston-Salem, NC. Providing emergency medical care to my patients is my passion, and I have taken medical missions trips to do the same for underprivileged people. My wife and I have three children and are active in the community. In my free time, I enjoy being active with hunting, fishing, golfing and coaching baseball.

Alexander Lee, M.D., FACEP, FAAEM

I was born in Korea, then moved to California where I graduated from high school. I received my medical degree from Tulane University in New Orleans and I completed my residency in Emergency Medicine at LSU/Charity Medical Center, and have been practicing in Dallas for almost a decade. In my free time, I enjoy photography, golf and spending time with my family. I am fluent in both English and Korean.

Joseph Meier, M.D.

Since high school, I have wanted to be an emergency medicine doctor. It was a dream come true when I was able to attend Mayo Medical School in Rochester and receive my medical degree almost 20 years ago. I had previously had a unique opportunity to teach troubled students in an alternative education environment. I was drawn to Dallas because I had a friend who lived here, and I quickly fell in love with this area and the people. My wife and children and I are privileged to be a part of this community. I am fluent in English and Spanish.

Dr. Meier was voted “Top Doc” in D Magazine two years. He has a patent in medical ultrasound technology.

Nick Paul Peters, M.D., FACEP

I became interested in medicine because I have a love for science and for people. I attended Creighton University in Nebraska for my medical degree and I completed my residency at the University of Arizona. I had the opportunity to work for and publish with Nobel Prize laureate Harold Varmus. I have been practicing emergency medicine for over 25 years in positions such as Regional Medical Director and Vice President of Medical Operations for a national health care provider. I transitioned from corporate medicine to become a founding Managing Partner at Advance ER. I am active in the Dallas community with my wife and 2 children. I enjoy bicycling and other outdoor activities in my spare time.

Dr. Peters has been named “Top Doc” in D Magazine. He is Chief Medical Officer at Advance ER.

Dr. Rajesh Rao, D.O., M.S., ABEM

After receiving my Doctor of Osteopathic Medicine degree from the Kansas City University of Medicine and Bioscience and my emergency medicine residency from East Carolina State University in Greenville, NC, I returned to Texas to begin my emergency medicine practice. I believe in the importance of giving back and have volunteered in situations such as Hurricane Katrina Disaster Relief. In my free time, I enjoy mountain biking, long treks, swimming and spending time with my family. I am fluent in English, Spanish and Telugu.

Ronnie Shalev, M.D.

A native Texan, I received my medical degree from Texas Tech University Health Sciences Center in Lubbock, TX. I completed my residency training at Drexel University School of Medicine in Philadelphia and lived in New York City for several years afterwards. I returned to Texas to continue my emergency medicine practice in my home state. I am fluent in English, Spanish and Hebrew. In my free time, I enjoy doing CrossFit, cooking, and spending time with my husband and two kids.

Thomas Vo, M.D., FAAEM

I’ve always had a passion for helping people, so medicine caught my interest early on. I received my medical degree from Northeastern Ohio University’s College of Medicine in Rootstown, OH. Texas is my home and I am proud to have served in hospital ERs across the state. In my free time, I like to be physically active and to play guitar. I also love spending time with my beautiful wife and four children.