Meet the Doctors


Dr. Nathan S. Sethman DDS

Dr. Nathan Storey Sethman has lived in Oklahoma since 1998. He grew up in Stillwater, the son of an Oral Surgeon, and has lived and breathed dentistry since he was a small child. He received his bachelor's degree in Microbiology at the University of Oklahoma in 2014.  Dr. Sethman then graduated from the University of Oklahoma College of Dentistry, in May of 2020.  

During his undergraduate studies, Dr. Sethman was an active member of the Academic Integrity Council, under the direction of the Provost to investigate and adjudicate academic misconduct claims and issues that arose within the various colleges. He continued this focus on ethics and integrity in dental school as Co-chair of Academic Misconduct.  Using the values and ethical principles he upheld, he plans to practice dentistry in Southwest Oklahoma.  

Dr. Sethman has been trained in the latest techniques utilizing the newest technologies at the OU College of Dentistry.  He gained invaluable experience in patient care with the various dental specialists at the college.

Dr. Sethman met his wife, Pan, in high school while she was a foreign exchange student from her native country of Thailand, in 2010.  They were married in 2016, and Pan was able to immigrate to the United States in 2017.  Pan and Dr. Sethman just had their first child, Penelope, in April of 2020. They are excited to make Altus their new home.  


Dr. James K. Ambrose, DDS


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Altus Office
907 Falcon Road
Altus, OK 73521
‎Phone: (580) 482-3974
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Mangum Office
1410 N Louis Tittle Ave
Mangum, OK 73554
‎Phone: (580) 782-5513
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