Dr. O'brien graduated from the University of Texas Medical School at Houston in 1984. He works in Thornton, CO and 1 other location and specializes in Allergy & Immunology.
Allergy & Immunology
Medical School: University of Texas Medical School at Houston; Graduated 1984
Please verify insurance information directly with your doctor's office as it may change frequently.
*This physician has multiple office locations. See Office Information for details.