Dan A. Galvan, M.D., F.A.C.S.
Dr. Dan Galvan returned to the Texas Tech University Health Sciences Center (TTUHSC)
in September of 2012 as Associate Professor and Chairman of the Department of Surgery.
Dr. Galvan is a graduate of Texas A&M University and the University of Texas Medical
Branch in Galveston. His post-doctoral education included a General Surgery Residency
at St. Joseph Hospital in Houston and a fellowship in Surgical Critical Care at the
University of Pittsburgh Medical Center. He was in private practice for several years
in Texas prior to joining Texas Tech’s Department of Surgery at Amarillo from 2000
to 2005. After completing a fellowship at University of Pittsburgh Medical Center
in 2006, he joined the faculty at the Penn State Hershey Medical Center where he was
an Assistant Professor in the division of Trauma, Acute Care and Critical Care Surgery
until his return to Texas Tech.
Dr. Galvan is board certified by the American Board of Surgery with additional qualifications
in Critical Care. He is completing his Masters in Health Profession Education at
the University of Illinois at Chicago. He has served in many roles as an educator
and has received numerous honors and awards in teaching.
Division of General and Acute Care (Trauma Critical Care)
Surgeons in the Division of General Surgery specialize in the management of patients
and the performance of surgery on these patients for diseases and abnormalities of
a wide variety of organs and body systems. These organs and systems include: internal
abdominal organs - the esophagus, the stomach, the gall bladder, the spleen, the liver,
the pancreas, the small and large intestines, and the adrenal glands; the structures
of the neck to include the thyroid and parathyroid glands, the trachea, the esophagus
and the salivary glands; all non cosmetic conditions of the breast; all varieties
of hernias - inguinal, femoral, incisional, ventral and diaphragmatic. Our General
Surgeons also perform limited vascular and non cardiac thoracic procedures, (specialized
procedures in these sub-specialties are performed by the members of the respective
Divisions). By virtue of additional training and extensive experience the General
Surgeons in this Division provide specialized Trauma and Critical Care to surgical
M. Haris Nazim, M.D., FACS, FACCWS, CWSP
Assistant Professor of Surgery
Trauma Medical Director, Northwest Texas Health Care System
M. Haris Nazim, MD is an American Board Certified Surgeon with added qualifications
in Advanced Wound care, Hyperbaric Oxygen therapy, Burn and Reconstructive Surgery
and is certified in Advanced Cardiac / Trauma and Burn Life Support. He was recruited
by Texas Tech University Health Sciences Center in Amarillo as a Medical Educator
and Clinician in Trauma and Acute Care Surgery in 2011.
As the Trauma Medical Director at North West Texas Healthcare System; he oversees
the quality of the trauma Program. This is accomplished through a collaborative relationship
with the Trauma Services Department, Nursing Administration and the relevant Medical
Staff. This program is amongst the top 10 percent in the country for quality of care
according to National Trauma Databank standards.
The success of the trauma program has led to Dr. Nazim to continue efforts towards
building a burn program in the area which would be an asset to the community. His
other interests include elective general surgery, advanced wound care, acute care
surgery and trauma / critical care.
Ariel P. Santos, M.D., MPH, FACS, FRCSC
Dr. Ariel P. Santos, a Fellow of the American College of Surgeons, is an American
board certified surgeon with added subspecialty qualifications in Trauma, Acute Care
Surgery and Surgical Critical Care.
Dr. Santos is a graduate of The University of Santo Tomas in Manila, Philippines and
earned his Master’s Degree in Public Health from the University of Louisville in Kentucky.
His post-doctoral education included a Residency in General Surgery followed by a
Fellowship in Surgical Critical Care at the University of Louisville Hospital. After
graduation, he moved to Canada where he practiced surgery as a Clinical Fellow at
University of Toronto in St. Michael’s Hospital and as a solo practitioner within
the Labrador Grenfell Health System in Newfoundland and Labrador.
While in Canada, Dr. Santos became a certified specialist and fellow of the Royal
College of Surgeons. He later on returned to the United States when he was recruited
to join the Trauma division at Penn State University Medical Center as assistant professor.
Dr. Santos was there for three years where he also held the position of Associate
program director of Emergency General Surgery. He then transferred to Amarillo, Texas
to be a part of the Texas Tech University Health Sciences Center in November 2015.
Dr. Santos has received numerous awards during his training years and clinical practice
including the Henry Christian Award and Dean’s award for teaching. He has also published
in peer review journals. He enjoys teaching and has interest in outcome based research.
He is a member of numerous organizations including the American College of Surgeon,
Eastern Association for the Surgery of Trauma (EAST), Canadian Association of General
Surgeon, and Hiram Polk Surgical Society.
Dr. Santos lives in Amarillo, Texas with his wife who shares his love for nature and
interest in culture, travel and sports..
D. Shane Harper, PA-C, MPAS, DFAAPA
Harper returns to the Texas Panhandle by joining the Texas Tech Department of Surgery
in July 2014. A native Texan, Mr. Harper grew up in Abilene and remained in Texas
for his undergraduate education. After completing his undergraduate education he attended
The University of Texas Medical Branch where he completed his Masters of Physician
Assistant Studies with Honors.
Mr. Harper then practiced privately in Canadian, Texas for five years before leaving
to attend a Critical Care Residency at the University of Massachusetts Medical Center. During
his time at UMass, he served as chief PA resident with a professional emphasis on
trauma and surgical critical care. After his residency,
Mr. Harper relocated to Tulsa, Oklahoma for five years to serve as the lead PA for
the Saint Francis Hospital Trauma/Acute Care Surgery Service in Tulsa, Oklahoma. After being
recruited to join the Texas Tech Department of Surgery, he happily returned to Texas
to be closer to family and friends.
Mr. Harper continues to care for the critically ill within the surigcal trauma intensive
care unit daily along with treating trauma and acutely injured patients.
Mr. Harper's professional interest include emergency trauma procedures, critical care
bedside procedures and educating students within a wide array of medical disciplines.
Outside of the hospital, Mr. Harper enjoys spending time with his wife and children,
preferably on their ranch in Roberts County. .
John P. Schnatz, FNP-C, CCRN, MSN
Surgery Faculty Associate
John Schnatz, FNP-C joined as Faculty Associate in the Department of Surgery in 2011.
He graduated from the College of St. Mary's, in Omaha, Nebraska with his undergraduate
degree. He attended West Texas A&M University in Canyon, Texas, where he received
his BSN and MSN degrees. He continued his training in Taos, New Mexico where he received
his certification in First Assist in Surgery.
Mr. Schnatz also received his critical care registered nurse certificate in 1984.
In his spare time he spends time with his wife and two children. He also enjoys participating
in triathlons and completed his first Ironman competition in 2012.
Division of Surgical Oncology
By virtue of their advanced and specialized training beyond General Surgery, surgeons
in the Division of Surgical Oncology provide diagnosis and surgical management of
patients with initial, complex, recurrent or advanced malignant disease. The performance
of surgery on these patients encompasses the entire spectrum of organs and body systems,
to include the head and neck, thorax, abdomen, skin and skin structure, and all soft
issue to include the breast. The management of malignant disease of the neurological
system (brain, spinal cord and peripheral nerves) and the eye is excluded from the
purview of these surgeons. Although certified in General Surgery, these Oncologic
Surgeons do not as a routine perform elective General Surgery procedures.
Subhasis Misra, M.D., MS, FACCWS, FACS
Chief, Gastrointestinal and Hepato-Pancreato-Biliary Surgery
Subhasis Misra, MD is board certified by the American Board of Surgery and is also
a Fellow of the American College of Certified Wound Specialists. He brings with him
significant expertise in providing comprehensive cancer care.
Dr. Misra performs advanced surgery for cancers of the liver, pancreas, esophagus,
stomach, and colon, including hyperthermic intraperitoneal chemotherapy and robotic
procedures, as well as surgery for other diseases of the gastrointestinal tract. Additionally
he performs complex surgical procedures to treat breast cancer, sarcoma, melanoma,
and endocrine tumors.
Dr. Misra earned his medical degree in India. He completed a general surgery internship
at Rush University Medical Center in Chicago, Illinois, and a general surgery residency
at Fairview Hospital/Cleveland Clinic in Cleveland, Ohio where he served as the Chief
Dr. Misra then completed a surgical oncology fellowship at the University of Miami/
Jackson Memorial Hospital in Miami, Florida. He additionally holds a master’s degree
in health systems management from Rush University in Chicago.
Dr. Misra has been published extensively in peer reviewed journals and has also presented
at numerous clinical conferences. He enjoys a busy life with his wife and their
beautiful little girl. During his spare time,
Dr. Misra enjoys reading and sports, and has a passion for quality improvement, leadership
and understanding human behavior.
H. Nail Aydin, M.D., FACS, FACCWS
Dr. Aydin obtained his medical degree from Istanbul University Cerrahpasa School of
Medicine, English Division, Istanbul, Turkey. He did his surgical internship at Zurich
University, Zurich, Switzerland.
After he completed five years of general surgery residency training at Haseki State
Hospital in Istanbul, Turkey, he moved to the United States. He completed 2 years
of a Clinical Research Fellowship in the department of Colorectal Surgery at the Cleveland
He decided to complete an ACGME approved Residency training in Surgery and did his
Internship in Surgery at the Cleveland Clinic, Cleveland, Ohio. He continued his training
in Surgery at Yale New Haven Hospital and Fairview Hospital Cleveland Clinic Health
System where he served as the chief resident in Surgery. After completion of his residency
training in Surgery, Dr. Aydin completed a fellowship council approved fellowship
training in Minimally Invasive Surgery and Advanced GI Endoscopy at St. Vincent Hospital,
After his training, he served as a general surgeon for three years in West Plains,
Missouri. After his service in the underserved area in Missouri, he completed a two
year clinical fellowship training in Surgical Oncology at Mercy Medical Center affiliated
with University of Maryland in Baltimore, Maryland.
After completion of his training in Surgical Oncology, he joined the department of
Surgery at Texas Tech Health Sciences Center in Amarillo as a full time faculty in
August of 2015. He is a board certified surgeon by the American Board of Surgery.
He is a fellow of American College of Surgeons.
Dr. Aydin is also certified in Wound Care by the American Board of Wound medicine
and Surgery. He is also a fellow of the College of Clinical Wound Specialists.
Dr. Aydin performs Complex Abdominal Surgery and treats Skin and Soft tissue tumors,
Sarcoma, Breast Cancer, Melanoma, Complex GI Surgery, Pancreas and Hepatobiliary Surgery,
Endocrine Surgery, and Peritoneal Surface Malignancies. He works closely with all
cancer care providers in the panhandle area and participates in all aspects of multidisciplinary
Division of minimally invasive surgery
Nathan Hansen, M.D.
Nathan Hansen, MD is board certified by the American Board of Surgery and completed
additional fellowship training in minimally invasive surgery. He joined Texas Tech
University Health Sciences Center in Amarillo Department of Surgery in 2014. His
practice includes general surgery with a focus on advanced laparoscopic and robotic
Dr. Hansen graduated from Penn State College of Medicine and completed his general
surgery residency training at The Penn State Milton S. Hershey Medical Center. After
finishing residency he completed a minimally invasive surgery fellowship through the
Palo Alto, VA Healthcare System (Stanford Affiliate).
LaJohn Quigley, M.D.
LaJohn Quigley, M.D. is board certified by the American Board of Surgery in General
Surgery and also Fellowship trained Minimally Invasive and Bariatric Surgery. Upon
completion of a Bachelor of Arts Degree from the University of Texas, he returned
to his home town of Lubbock, Texas to attend medical school at Texas Tech University
Health Sciences Center.
Post-Doctoral education includes a General Surgery Residency at University Medical
Center/Texas Tech University Health Sciences Center in Lubbock, Texas and a Fellowship
in Minimally Invasive and Bariatric Surgery at Greenville Health Systems in Greenville,
Dr. Quigley joined Texas Tech University Health Sciences Center Department of Surgery
as an Assistant Professor in September 2014. His practice includes Bariatric and General
Surgery with a focus on advanced Laparoscopic and Robotic surgery.
Dr. Quigley enjoys spending time with his new wife and son, and traveling to Lubbock
to visit family.
Darren Peterson, M.D., FACS
Dr. Darren Peterson is an alumni of both the Texas Tech Department of Mechanical Engineering
and the School of Medicine. After the collapse of the defense industry in the early
1990’s he left the engineering world and returned to Texas Tech to complete a minor
in Biology and Chemistry before starting medical school in 1997. His post-doctoral
education continued at the University of Florida at Jacksonville where he developed
a passion for Minimally Invasive Surgery.
Following residency he entered private practice in Palm Coast, Florida where his interests
expanded to include robotic surgery until his return to Texas Tech as an Associate
Professor to join his long-time friend, Dr. Galvan to help rebuild and expand the
Department of Surgery.
His area of interest focuses on minimally invasive foregut and colorectal surgery.
Dr. Peterson is board certified by the American Board of Surgery and a Fellow of
the American College of Surgeons.
Division of General Surgery
Dr. Laith Al-Balbissi, M.D.
Dr. Al-Balbissi received his Bachelor of Medicine and Bachelor of surgery degree from
the University of Jordan. He then joined East Tennessee State University where he
had finished his surgical training.
During his training, he received several awards for best teaching resident. In 2015,
he was awarded the “Eric R Manahan award for outstanding surgical resident performance”.
Continuing his academic passion, he then joined the Surgery Department at Texas Tech
University Health Science Center in Amarillo in 2015.
Iza Obokhare, M.D., FACS, FICS
Dr. Izi Obokhare is a board certified general surgeon with additional qualifications
in Colorectal Surgery, advanced laparoscopic and endoscopic surgery in Amarillo Texas.
He received his medical degree from Howard University College of Medicine in Washington,
D.C., and completed a general surgery residency at the University Hospitals of Cleveland
– Case Western Reserve University in Cleveland OH. He completed a fellowship in Colon
and Rectal Surgery Research at the Ochsner clinic in New Orleans where he obtained
additional training in the diagnosis and treatment of benign and malignant diseases
of colon, rectum, and anus.
He has a special interest in state-of-the-art minimally invasive techniques and approaches
to anorectal tumors such as transanal minimally invasive surgery (TAMIS), laparoscopic
colectomy for colon cancer, familial colon cancer syndromes, diverticulitis, colonic
inertia and ulcerative colitis.
Dr. Obokhare is a Fellow of the American College of Surgeons and a member of the American
Society of Colon and Rectal Surgery, and the Society of American Gastrointestinal
and Endoscopic Surgeons. In addition to the numerous leadership, academic and scholarship
awards he has received,
Dr. Obokhare has presented his research at several scientific meetings. His research
manuscripts have been published in peer reviewed medical journals. He lives in Texas
with his wife Dr. Joy Obokhare an ENT and Facial Plastics surgeon and his two lovely
children. He is currently accepting new patients with most insurance plans.
Alan Sbar, M.D.
Dr. Sbar received his BA in Biochemistry from Rutgers in 1992. He graduated medical
school from George Washington University in 1996. He was a General Surgery Resident
at Brooke Army Medical Center. He worked overseas in Germany for 4 years and practiced
in Wisconsin before joining the Texas Tech Family in 2014.
He has two children and is married to Dr Evelyn Sbar who is the Clinic Director of
Robert Gutierrez, FNP
Robert joined the TTUHSC family in 2014. He graduated from WTAMU in May of 2013 with
a BSN/MSN-FNP. He has practiced in Amarillo for 18 years.
Kendra Williams, FNP
Kendra graduated from WTAMU in 2014 with a Master’s of Science and Nursing, Family
Nurse Practitioner. She joined the Texas Tech Family in 2015. Before joining Texas
Tech, she was an air ambulance flight nurse.
Division of Otolaryngology
Otolaryngologists provide comprehensive medical and surgical care to patients with
diseases and disorders that affect the ears, the respiratory and upper alimentary
systems and related structures of the head and neck. The care rendered by this Division
is focused primarily on children who present with these conditions. A limited number
of adults are accommodated by our current single specialist.
William P. Hale, M.D., F.A.C.S.
Clinical Professor of Surgery
William P. Hale, M.D. joined Texas Tech in 1977 as Assistant Clinical Professor while
still in private practice. He graduated from the University Of Louisville School
Of Medicine, Louisville, Kentucky in 1958.
Dr Hale was the first to finish Otolaryngology at Parkland Hospital in Dallas 1962. He
came to Amarillo following his residency to open a private practice; later when he
retired from private practice he joined Texas Tech as Professor in 2001. Dr Hale
is board certified with the American Board of Otolaryngology.
Dr Hale enjoys mentoring medical students and residents. Outside of the office Dr.
Hale appreciates photography, travel, and history.