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Doctor Profile

Stephen J. Usala

Stephen Usala

Texas Tech University Health Sciences Center
1400 S Coulter Street
Amarillo, TX 79106-1786


Texas (TX)

Endocrinology; Internal Medicine


Internal Medicine

Languages Spoken: English, German

Published In:

Texas Super Doctors 2019
Texas Super Doctors 2018
Texas Super Doctors 2017
Texas Super Doctors 2016
Texas Super Doctors 2015
Texas Super Doctors 2014
Texas Super Doctors 2013
Texas Super Doctors 2012
Texas Super Doctors 2011
Texas Super Doctors 2010
Texas Super Doctors 2009
Texas Super Doctors 2008
Texas Super Doctors 2007
Texas Super Doctors 2006
Texas Super Doctors 2005

About Stephen Usala

Medical School: Pritzker School of Medicine, University of Chicago

Graduation Year: 1982

Honors and Awards:

1995                  Van Meter Award, American Thyroid Association

1996                  Fellow, American College of Physicians

Special Licenses/Certifications:


Endocrinology, Diabetes and Metabolism

Internal Medicine

Participating in Maintenance of Certification


Community Service:

Knights of Columbus

Publications, Lectures and Presentations:

Trindade AA, Usala SJ. Cervical-Vaginal Mucin in Fertility Assessment: CA125 as a Predictor of the Fertile Phase of the Normal Menstrual Cycle. Medicina (Kaunas). 2020;56(6):E304. Published 2020 Jun 20. doi:10.3390/medicina56060304


Most recent:

  1. Wang J, Usala SJ, O’Brien-Usala F, Biggs WC, Vaughn MW, McKenna GB. The fertile and infertile phases of the menstrual cycle are signaled by cervical-vaginal fluid die swell functions. The Endocrinologist 2009; 19:291-297.
  2. Shamim N, Usala SJ, Biggs WC, McKenna GB. The elasticity of cervical-vaginal secretions is abnormal in polycystic ovary syndrome: case report of five PCOS women. Indian Journal of Endocrinology and Metabolism, Indian Journal of Endocrinology and Metabolism 2012;16:1019-1021.
  3. Usala SJ, Biggs WC, O’Brien-Usala F. Vaginal swab levels of CA125 are related to time of cycle in ovulatory women: a pilot study. J Reprod Med 2015;60:287-293.
  4. Usala SJ. A 19-year story of adrenal hemorrhage, adrenal insufficiency, and adrenal recovery: dynamic cosyntropin results with treatment considerations. Acta Endocrinologica (Buc), vol. XII, no. 4, p. 469-474, 2016. doi: 10.4183/aeb.2016.469.

Selected other past work:

  1. Usala SJ, Brownstein B, Haselkorn R. Displacement of parental RNA strands during in vitro transcription by bacteriophage phi6 nucleocapsids. Cell 1980;19:855-862.
  2. Usala SJ, Bale AE, Gesundheit N, Weinberger C, Lash RW, Wondisford FE, McBride OW, Weintraub BD. Tight linkage between the syndrome of generalized thyroid hormone resistance and the human c-erbAbeta gene. Mol Endocrinol 1988;2:1217-1220.
  3. Usala SJ, Schumacher GFB. Volumetric self-sampling of cervicovaginal fluid: A new approach to ovulation timing. Fertil Steril 1983;39:304-309.
  4. Usala SJ, Tennyson GE, Bale AE, Lash RW, Gesundheit N, Wondisford FE, Accili D, Hauser P, Weintraub BD.A base mutation of the c-erbAbeta thyroid hormone receptor in a kindred with generalized thyroid hormone resistance. J Clin Invest 1990;85:93-100.
  5. Usala SJ, Menke JB, Watson TL, Wondisford FE, Weintraub BD, Berard J, Bradley WEC, Ono S, Mueller OT, Bercu BB. A homozygous deletion in the c-erbAbeta thyroid hormone receptor gene in a patient with generalized thyroid hormone resistance: isolation and characterization of the mutant receptor. Mol Endocrinol 1991;5:327-335.
  6. Usala AL, Madigan T, Burgera B, Sinha MK, Powell JG, Usala SJ. Intravenous, but not subcutaneous, insulin-like growth factor I induces sustained insulin sensitivity in severely resistant type I diabetic subjects. J Clin Endocrinol Metab 1994;79:435-440.
  7. Lisker-Melman M, Di Bisceglie AM, Usala SJ, Weintraub BD, Murray LM, Hoofnagle JH, Development of thyroid disease during therapy of chronic viral hepatitis with interferon alpha. Gastroenterology 1992;102:2155-2160.

Educational Background:

University of Chicago, A.B., 1975. Physics

University of Chicago, Ph.D., 1980. Biophysics & Theoretical Biology

University of Chicago, M.D., 1982. Medicine

Case Western Reserve University, 1982-1985. Internal Med Residency

National Institutes of Health, 1985-1989. Endocrine Fellowship

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