Nathan T. Orr, MD, FACS

2021 N. MacArthur Blvd., Suite 225
Irving, TX 75061
Phone: 214-821-9600
Email: nathanorr.md@gmail.com

Medical License

Kentucky #46742
Texas #S8089

Certifications

Advanced Cardiac Life Support
Advanced Trauma Life Support
Fundamentals of Laparoscopic Surgery

Jan 2015- Jan 2025: American Board of Surgery, General Surgery

Jan 2016 – present: RPVI American Registry for Diagnostic Medical Sonography (ARDMS # 192917)

May 2017-May 2027: American Board of Surgery, Vascular Surgery

Education & Training

June, 1997: Berkner High School, Richardson, TX

May, 2004: Brigham Young University, Provo, UT
Bachelor of Science in Business Management

May, 2008: The University of Texas Southwestern Medical Center, Dallas, TX
Doctor of Medicine

Professional Experiences

July, 2008-June, 2013: The University of Kentucky, Lexington, KY
PGY1-5/Chief Resident, General Surgery

July, 2013-June, 2015: The University of Kentucky, Lexington, KY
Vascular/Endovascular Fellow

PRACTICE AND ACADEMIC APPOINTMENTS

Oct, 2020 – Present: Vascular and Endovascular Surgeon
Texas Vascular Associates, PA

Oct, 2020 – Present: Associate Program Director
Vascular Surgery Fellowship
Baylor University Medical Center Dallas

Oct, 2020 – Present: Medical Director of Vascular Surgery
Baylor Scott and White Medical Center Irving

July, 2015 – Sept, 2020: Associate Professor of Surgery
University of Kentucky College of Medicine

July, 2015- Sept, 2020: Attending Surgeon, Lexington Veterans Administration Medical Center, Lexington, Kentucky

Feb, 2016 – Sept, 2020: Associate Program Director
Vascular Surgery Fellowship
University of Kentucky

Nov, 2016 – Sept, 2020: Medical Director, Non-invasive Vascular Laboratory
University of Kentucky Hospital

Nov, 2017 – Sept, 2020: Medical Director, Wound Care
University of Kentucky Hospital

HOSPITAL APPOINTMENTS

Oct, 2020 – Present Attending Surgeon
Baylor Scott and White Medical Center Irving, TX

Oct, 2020 – Present Attending Surgeon
Baylor Scott and White Medical Center Grapevine, TX

Oct, 2020 – Present Attending Surgeon
Baylor Heart and Vascular Hospital Dallas, TX

July, 2015 – Sept, 2020 Attending Surgeon, University of Kentucky
Chandler Medical Center, Lexington, Kentucky

July, 2015 – Sept, 2020 Attending Surgeon, Lexington Veterans Administration Medical Center, Lexington, Kentucky

Nov, 2018 – Sept, 2020 Associate Medical Staff, Vascular Surgery
St. Claire HealthCare, Morehead, Kentucky

HONORS and AWARDS

June, 2011 Medical Student Teaching Award
May, 2014 Medical Student Teaching Award
May, 2017 Recognition of Excellence in Medical Student & Resident
Teaching Award

ADVISING ACTIVITY

Mentoring: Vascular Surgery Fellows
2014-2016 Noah Scherrer, MD
2015-2017 Oluwafunmi Awonuga, MD
2016-2018 Michael Bounds, MD
2017-2019 Cheryl Richie, MD
2018-2020 Dan Badia, DO
2019-2021 Lauren Frye, DO

Preceptor: UK Physicians’ Assistant Program

2017-2018 David Nelson
Madison Higgins
2018-2019 Austin Simpson
Tyson Wyant

Faculty Teaching Activity

University of Kentucky-Grand Rounds

2012 (April 18) “Carotid Artery Disease”.
General Surgery Grand Rounds

2013 (March 13) “Thoracic Aortic Injury”.
General Surgery Grand Rounds

2014 (May 14) “Research Potpourri”.
General Surgery Grand Rounds

2014 (May 28) “Aortic Graft Infection”.
General Surgery Grand Rounds.

2015 (Feb 25) “Coffee, Doughnuts, and Aortic Dissections.”
General Surgery Grand Rounds.

2016 (Feb17) “The WIfI classification”
General Surgery Grand Rounds

2018 (April 27) “PVD and Rehab”
Supervised Exercise Therapy and Attempts to Remain Bipedal
Internal Medicine Grand Rounds

2019 (Sept 11) “Coal Miners, Football, and Paclitaxel”
General Surgery Grand Rounds

University of Kentucky Hospital and Vascular Fellowship

2015 (Nov 19) Surgery Journal Club

2017 (Jan 1, May 5) Vascular Laboratory Quality Assurance Program
(Aug 25, Nov 17) UK Vascular Lab in collaboration with the
Society of Vascular Ultrasound CME on-going program

2018 (Feb 23, Aug 24) Vascular Laboratory Quality Assurance Program
UK Vascular Lab in collaboration with the
Society of Vascular Ultrasound CME on-going program

2019 (Jan 18, July 26) Vascular Laboratory Quality Assurance Program
UK Vascular Lab in collaboration with the
Society of Vascular Ultrasound CME on-going program

University of Kentucky-General Surgery Residency

2016 (March 2) Arterial Occlusive Disease/Mesenteric Ischemia
General Surgery Teaching Conference

2016 (June 17) ESS Preparation Lecture/Acute Limb Ischemia
General Surgery Teaching Conference

2016 (July 6) Cardiac Arrhythmia/Shock/Chest Pain
General Surgery Teaching Conference

2017 (March 22) Thrombophlebitis – Acute and Suppurative –Vascular Venous
General Surgery Teaching Conference

2017 (June 19) ESS Preparation Lecture/AAA and AMI
General Surgery Teaching Conference

2017 (June 23) ESS Preparation Lecture/ Acute Limb Ischemia
General Surgery Teaching Conference

2017 (July 5) Cardiac Arrhythmia/Shock/Chest Pain
General Surgery Teaching Conference

2017 (July 14) Intern Summer School/Boot Camp
General Surgery Conference

2018 (Jan-Feb) General Surgery M & M Conference Moderator

2018 (Feb 21) Vascular Trauma
Surgery Teaching Conference

2018 (Mar 28) Surgery Mock Oral Examiner
Department of Surgery

2018 (June 22) ESS Preparation Lecture – Acute Limb Ischemia
General Surgery Teaching Conference

2018 (July 9) Cardiac Arrhythmia/Shock/Chest Pain
General Surgery Teaching Conference

2019 (March 20) Chronic Venous Disease
General Surgery Teaching Conference

2019 (June 24) ESS Preparation Lecture/Acute Limb Ischemia
General Surgery Teaching Conference

2019 (July 8) Cardiac Arrhythmia/Shock/Chest Pain
General Surgery Teaching Conference

2019 (Oct) General Surgery M & M Conference Moderator

University of Kentucky-Medical Students

2018 (July 19) MS3Wound Healing Lecture
UK Medical Students

2019 (July 26) MS3Wound Healing Lecture
UK Medical Students

2019 (Sept 13) MS3Wound Healing Lecture
UK Medical Students

Regional

2020 (Nov) Mock Orals, Texas Society for Vascular and Endovascular Surgery
2020 (Jan) Mock Orals, Southern Association for Vascular Surgery
IX. ADMINISTRATIVE ACTIVITY AND UNIVERSITY SERVICE
09/2015- 09/2020 Comprehensive Stroke Center Certification (CSC)
Countdown Committee
12/2015- 09/2020 Medical Student Surgery Education Committee
12/2015- 09/2020 Clinical Competency Committee (CCC)
02/2016-05/2018 Surgery Value Analysis Committee
06/2017-09/2020 CV Patient Experience Steering Committee
07/2017-09/2020 Supervised Exercise Therapy Committee
10/2018-09/2020 Physician Champion Dyad, Vascular Lab
10/2018-09/2020 Physician Champion Dyad, Wound Care Clinic
03/2019-09/2020 Surgery Educators Workgroup
02/2020-09/2020 Surgical Education Wellness Committee

Journal Reviewer:
2017 Clinical Nephrology
2018 Journal of Vascular and Endovascular Surgery
2018 Annals of Vascular Surgery

PROFESSIONAL ACTIVITY, PUBLIC SERVICE, & PROFESSIONAL
DEVELOPMENT

Professional Membership

July 2012 to 2018 American College of Surgeons, candidate member
Oct 2018 to Present American College of Surgeons, Fellow (FACS)

July 2013 to 2018 Society of Vascular Surgery, candidate member
Apr 2018 to Present Society of Vascular Surgery, active member (SVS)

July 2013 to 2019 Southern Association for Vascular Surgery, candidate member
Jan 2019 to Present Southern Association for Vascular Surgery active member (SAVS)

Mar 2015 to 2018 Society for Clinical Vascular Surgery, candidate member (SCVS)
Nov 2018 to Present Society for Clinical Vascular Surgery active member (SCVS)

Jan 2016 to Present RPVI American Registry for Diagnostic Medical Sonography

Mar 2016 to Present Vascular and Endovascular Surgery Society (VESS)

Professional Regional/National Committees

2017-2019 Vascular and Endovascular Surgery Society (VESS)
Vascular Resident and Fellow Education Committee

2020-2022 Vascular and Endovascular Surgery Society (VESS)
Student Education Committee

Medical Volunteer Experience

Aug 2005 Volunteer triage assistant for Hurricane Katrina Relief Center
July 2004 to 2006 Volunteer at free community health clinic
July 2013 “Surgery on Sunday”; volunteer surgeon for uninsured

FACULTY DEVELOPMENT / CONFERENCE ATTENDANCE:

Feb 4-7, 2016 Vascular and Endovascular Surgery Society
40th Annual Meeting, Park City, UT

Mar 18-22, 2017 Society for Clinical Vascular Surgery
45th Annual Symposium, Lake Buena Vista, FL

Jan 17-20, 2018 Southern Association for Vascular Surgery
SAVS 42nd Annual Meeting, Scottsdale, AZ

Jan 31-Feb 4, 2018 Vascular and Endovascular Surgery Society
42nd Annual Meeting, Vail, CO

May 1-2, 2018 Surgery Education Week (SEW/ASE/APDS)
New Program Directors Workshop, Austin, TX

Jan 31-Feb 3, 2019 Vascular and Endovascular Surgery Society
43rd Annual Meeting, Snowbird, UT

Jan 8-11, 2020 Southern Association for Vascular Surgery
SAVS 44th Annual Meeting, Palm Beach, FL

PRESENTATIONS

Local:
“Peripheral Arterial Disease and our attempts to Remain Bipedel”. Orr NT. Georgetown Community Hospital Grand Rounds, Georgetown, KY. Nov 2, 2018.

Regional/National Poster and Video Presentations:

“Evaluation of patient vital capacity and pain following rib open reduction internal fixation for flail chest”. Poster presentation at EAST 25th Annual Scientific Assembly; Lake Buena Vista, FL. Jan 2012.

“Epiphrenic Diverticulum with Achalasia and Paraesophageal Hernia”. Poster presentation at the Southeastern Surgical Congress. Jacksonville, FL. Feb 9, 2012.

“Vascular surgery readmissions after common vascular procedures: Risk factors and cost analysis”. Poster presentation at SVS national meeting in Boston, MA. June 6, 2014.

“Risk Factors for Transfusion in Elective EVAR and the Associated 30-day Clinical Outcomes”. Orr NT, Campbell EH, Xenos ES, Davenport DL. Poster presentation at SCVS, Orlando. March 2017.

“Endovascular Recanalization of Chronic Juxtarenal Aortoiliac Occlusions Utilizing Adjuvant Renovisceral Protection Maneuvers”. Awonuga O, Orr NT, Saha S, Minion DJ. Poster presentation at SCVS, Orlando. March 2017.

“The Snorkestrated Technique of Combines Parallel Endografts and Fenestrated Endovascular Aneurysm Repair”. Bounds MC, Orr NT, Xenos ES, Bobadilla JL, Minion DJ. Poster presentation at SCVS, Orlando. March 2018.

“Open Left Subclavian Artery Revascularization During Thoracic Endovascular Aortic Repair in Zone 2 Anatomy is Associated with Increased Morbidity, But Similar Mortality”. Aru R, Miller J, Bounds M, Davenport D, Orr N, Minion D, Tyagi S. Poster presentation at Eastern Vascular Society 32nd Annual Meeting. Washington, DC. September 6-9, 2018.
“Retrograde Bypass is Preferable to Antegrade Bypass for Open Mesenteric Revascularization.” Richie C, Huerta C, Bounds M, Badia D, Orr N, Endean E. Poster presentation at Southern Association for Vascular Surgery. January 25, 2019.
“Contemporary Outcomes of Peripheral Bypass Compared to Amputation in Octogenarians”. Richie CD, Davenport DL, Orr NT. Poster presentation at VESS, Snowbird, UT. Feb 2, 2019.

“Open Left Subclavian Artery Revacularization During Thoracic Endovascular Aortic Repair in Zone 2 Anatomy is Associated with Increased Morbidity, but Similar Mortality”. Aru R, Miller J, Bounds MC, Davenport D, Orr NT, Minion DJ, Tyagi SC. Poster presentation at SCVS, Orlando. March 2019.

“Lateral Axillary Exposure for Antegrade Access during Endovascular Repair of Complex Abdominal Aortic, and Thoracoabdominal Aneurysms”. Miller J, Aru R, Bounds MC, Orr NT, Minion DJ, Tyagi SC. Poster presentation at SCVS, Orlando. March 2019.

“Parallel Endografts Extend the Applicability of Fenestrated Endovascular Aneurysm Repair with Minimal Impact on Complication Rates”. Richie CD, Bounds MC, Orr NT, Tyagi SC, Xenos ES, Bobadilla JL, Minion DJ. Poster presentation at SCVS, Orlando. March 2019.

“Direct open retrograde revascularization for mesenteric ischemia”.  Endean ED, Tyagi S, Bounds M, Orr N, Huerta CT.  Video presentation at Society for Vascular Surgery, Vascular Annual Meeting. National Harbor, Washington DC. June 14, 2019.

Regional/National Podium Presentations:

“Evaluation of patient vital capacity and pain following rib open reduction internal fixation for flail chest”. Oral Presentation at ACS Kentucky Chapter, Lexington, KY. Oct 2011.

“Outcomes of simultaneous laparoscopic cholecystectomy and ventral hernia repair compared to laparoscopic cholecystectomy alone”. Podium presentation at SAGES national meeting in San Diego, CA. March 9, 2012.

“Comparison of Endovascular and Open Repair for Juxtarenal and Pararenal Aneurysms” Podium presentation at Southern Association for Vascular Surgery, Scottsdale, AZ. Jan 15, 2015.

“Contemporary 30-day Outcomes for Percutaneous Endovascular Aneurysm Repair using the ACS-NSQIP Database.” Society of Clinical Vascular Surgery 43rd Annual Symposium on Vascular Surgery for Podium Presentations. Miami, FL. Mar 30, 2015.

Acute mesenteric Ischemia –Endo first strategy is best for AMI. European Society of Vascular Surgery as a representative of the Society of Vascular Surgery as part of an international debate. Porto, Portugal. Presented by Endean E. September 22-25, 2015.

Revascularization of Intermittent Claudicants Leads to Higher Rates of Chronic Limb Threatening Ischemia and Rates of Amputation. Madabhushi V, Davenport D, Bounds M, Orr N, Endean E, Tyagi S.   Southern Association for Vascular Surgery.  Palm Beach, FL. January 8-11, 2020.

PUBLICATIONS

Abstracts:

Orr NT, Davenport DL, Xenos ES. “Comparison of Endovascular and Open Repair for Juxtarenal and Pararenal Aneurysms”.  J Vasc Surg (2014) 60(6):1719; Abstract
Orr NT, El-Maragh S, Davenport DL, Xenos ES. “PS62 Vascular Surgery Readmissions After Common Vascular Procedures: Risk Factors and Cost Analysis”. J Vasc Surg (2014) 59(6):50S; Abstract
Orr NT, Campbell EH, Xenos ES, Davenport DL. “Risk Factors for Transfusion in Elective EVAR and the Associated 30-day Clinical Outcomes” SCVS, Orlando. March 2017. Abstract

Publications:

Orr NT. Deep Vein Thrombosis is an Underdiagnosed Life-Threatening Condition. Kentucky Living Magazine. 2017 August 13.

Orr NT. Are You at Risk for Deep Vein Thrombosis? UK Healthcare Blog – Latest News 2017 August 14.

Orr NT. Pain from PAD? Exercise is best, says UK expert. UK Healthcare Blog – Latest News 2017 December 7.

Orr NT. Pain from PAD? Exercise is best, says UK expert. UK Healthcare Blog – Latest News 2017 December 7.

Orr NT. Making the Rounds, Health Matters. UK Healthcare Blog –2019 July 30.

Peer Reviewed Publications:

Carter RR, Orr NT, Minion DJ, Xenos ES, “Aortic injury from posterior rib fracture”. Eur J Cardiothorac Surg (2011) 39 (1): 138. PMID 20627607

Xenos ES, Orr NT, Valentino J, “Internal carotid pseudoaneurysm associated with tortuosity after tonsillectomy: a case report”. Int J Angiol. 2012 Sep;21(3):159-62. PMID: 23997561

Orr NT, Davenport D, Roth JS, “Outcomes of simultaneous laparoscopic cholecystectomy and ventral hernia repair compared to laparoscopic cholecystectomy alone”. Surg Endosc. 2013 Jan;27(1):67-73 PMID 22736287

Orr N, Minion DJ, Bobadilla JL. Thoracoabdominal Aortic Aneurysm Repair: Current Endovascular Perspectives. Vascular Health and Risk Management. 2014 Aug:10:493-505 PMID: 25170271
Orr NT, El-Maraghi S, Korosec, RL, Davenport DL, Xenos ES. “Cost Analysis of Vascular Readmissions after Common Vascular Procedures”.  J Vasc Surg (2015) Nov;62(5):1281-1287 PMID 26251167
Bijörck, M, Orr NT, Endean, ED. “Debate: Whether an endovascular-first strategy is the optimal approach for treating acute mesenteric ischemia”. J Vasc Surg (2015) 62 (3) 767-772. PMID 26304485
Orr NT, Endean ED. Part Two: Against the Motion. An Endovascular First Strategy is not the Optimal Approach for Treating Acute Mesenteric Ischemia.
Eur J Vasc Endovasc Surg. 2015 Sep;50(3):276-9. PMID: 26315053

Orr NT, Winkler MA, Xenos ES. Type IIIb Endoleak Associated with an Infected Thoracoabdominal Endograft. The International Society for Minimally Invasive Cardiothoracic Surgery. Innovations. 2016 Sep/Oct; 11(5):367-369. PMID 27819805

Orr NT, Davenport DL, Minion DJ, Xenos ES. Comparison of Perioperative Outcomes in Endovascular versus Open Repair for Juxtarenal and Pararenal Aortic Aneurysms: a Propensity Matched Analysis. Journal of Vascular Surgery. Epub 2016 Nov 30. 2017 Aug; 25(4):339-345. PMID: 27903931

Huerta C, Orr N, Tyagi SC, Badia DJ, Richie CD, Endean ED. Direct Retrograde Bypass is Preferable to Antegrade Bypass for Open Mesenteric Revascularization. 2020 Jul;66:263-271. PMID: 31931133

Madabhushi V, Richie C, Bettis A, Davenport D, Orr N. Contemporary Outcomes of Peripheral Bypass Compared with Amputation in Octogenarians. 2020 Aug;S0890-5096. PMID: 32866570

Campbell EH, Awonuga OO, Madabhushi VV, Davenport DL, Orr NT. Risk Factors for Transfusion in Elective Infrarenal EVAR and the associated 30-day Clinical Outcomes: a Propensity-Matched Analysis. Submitted Vasc and Endovasc Surgery 2/2020

PERSONAL LEADERSHIP AND CULTURAL EXPERIENCE

Fluent in Spanish–Lived in Argentina for two years (1998-2000)
Assistant captain for collegiate ice hockey team (2000-2004)
Eagle Scout and volunteer with the Boy Scouts of America

Updated: October 2019