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Munir Hazbun, MD, is a board-certified pulmonologist, critical care specialist, and sleep medicine physician serving patients in Dallas, Texas. He joined Southwest Pulmonary Associates in 2008 and brings a wealth of experience and a patient-centered approach to the diagnosis and treatment of complex respiratory and sleep disorders.

Originally from Santiago, Chile, Dr. Hazbun earned his medical degree from the prestigious Universidad de Chile. He completed his internship at Texas Tech Health Science Center in El Paso and went on to pursue fellowship training at Baylor College of Medicine in Houston, where he specialized in Pulmonary, Critical Care, and Sleep Medicine.

Dr. Hazbun is quadruple board certified by the American Board of Internal Medicine in Pulmonary Medicine, Sleep Medicine, and Internal Medicine. His clinical interests include persistent cough, shortness of breath, lung cancer, sarcoidosis, and complex sleep-related breathing disorders. Known for his thoughtful, comprehensive care, he works closely with each patient to identify the root cause of their symptoms and create personalized treatment plans.

Fluent in both English and Spanish, Dr. Hazbun is committed to serving the diverse needs of the Dallas community. He has been named among D Magazine's Best Doctors and recognized as a Texas Super Doctor from 2010 to 2015 and again in 2025. He has also served as a board member for the local chapter of the American Lung Association.

Outside of medicine, Dr. Hazbun enjoys spending time with his wife, Dr. Pilar Bescos, a family medicine physician, and their two children. His personal interests include biking, pickleball, golf, learning piano, gardening and traveling with his family.

Arhaanth Reddy, MD, is a board-certified pulmonologist at Southwest Pulmonary Associates in Plano, Texas. He is known for his expertise in diagnosing and treating complex respiratory conditions and for delivering evidence-based care with compassion and precision.

Dr. Reddy earned his medical degree from the University of California, San Diego School of Medicine, and completed his residency in internal medicine at UT Southwestern Medical School in Dallas, Texas. He went on to complete a fellowship in pulmonary and critical care medicine at UT Southwestern, where he also earned a Master of Science in Healthcare Leadership and Management. His academic excellence was recognized early on with election to the Alpha Omega Alpha Honor Medical Society and the prestigious Richard Mays Smith Award in Internal Medicine.

Dr. Reddy is triple board-certified by the American Board of Internal Medicine in Critical Care Medicine, Neurocritical Care Medicine, and Pulmonary Medicine.

In addition to his clinical work, Dr. Reddy serves as the current Vice Chair of the Department of Medicine at Texas Health Plano, where he helps shape the future of patient care, quality, and medical education.

Dr. Reddy offers a comprehensive range of advanced diagnostic procedures, including robotic bronchoscopy, endobronchial ultrasound (EBUS), and integrated 3D fluoroscopy, providing patients with cutting-edge evaluation and treatment options.

He has also been the recipient of several awards, including the:

• Alpha Omega Alpha Honor Medical Society, 2011
• Richard Mays Smith Award in Internal Medicine, UT Southwestern, 2011

Dr. Reddy chose a career in pulmonary and critical care medicine because he enjoys complex problem-solving and transforming insights into better outcomes for his patients.

Outside of medicine, he enjoys traveling, photography, reading, and, most of all, spending time with his three wonderful children.

Anthony Ortegon, MD, is a board-certified pulmonologist, critical care specialist, and sleep medicine physician providing expert care to patients in Dallas, Texas. Since joining Southwest Pulmonary Associates in 2013, Dr. Ortegon has been dedicated to helping individuals manage a wide range of respiratory and sleep-related conditions with compassionate, evidence-based care.

Dr. Ortegon earned his Bachelor of Arts in Biology from Swarthmore College in Pennsylvania and went on to receive his Doctor of Medicine from Temple University in Philadelphia. He completed both his residency in Internal Medicine and his fellowship in Pulmonary and Critical Care Medicine at UT Southwestern Medical School in Dallas, one of the nation’s leading academic medical centers.

He is triple board certified by the American Board of Internal Medicine in Internal Medicine, Pulmonary Medicine and Critical Care Medicine. Dr. Ortegon specializes in the diagnosis and treatment of conditions such as asthma, COPD, interstitial lung disease, pulmonary hypertension, and sleep apnea. Dr. Ortegon has a special interest in the diagnosis of various lung pathologies requiring multiple advanced bronchoscopy procedures, including Ion robotic bronchoscopy. Overall, his clinical approach emphasizes clear communication, individualized care plans, and a strong commitment to improving his patients’ overall health and quality of life.

Known for his thoroughness and approachability, Dr. Ortegon values the long-term relationships he builds with his patients. He is proud to be part of the Southwest Pulmonary Associates team and to serve the Dallas community with integrity and expertise.

Gary E. Goff, MD, has come to be known as one of the leading physicians serving Dallas and North Texas families. His combination of reputable training, extensive experience, and compassionate service have set him apart, leading to long-term relationships with his patients built on trust and integrity. He specializes in the diagnoses, treatment, and prevention of chronic illnesses, cardiac health, cancer, diabetes, preventative medicine, common ailments, and more.

Dr. Goff attended Hardin Simmons University in Abilene, Texas, where he completed his undergraduate degree. Following undergraduate studies, Dr. Goff moved on to Dallas to attend the University of Texas Southwestern Medical School to complete his medical degree in 1993. He underwent his internship and residency training at Parkland Memorial Hospital and St. Paul University Hospital, both prestigious medical facilities.

Following the completion of his residency program, Dr. Goff gained extensive experience serving in many roles throughout the healthcare system. He has worked in affiliation with Baylor University Medical Center in Dallas, served as the medical director for both the Baylor Ellis County Community Health Clinic as well as the Pleasant Manor Nursing Center in Waxahachie, Texas, and created his own vibrant medical practice. Throughout these experiences, he has come to be seen as a caring and dedicated physician committed to community wellness.

Dr. Goff is board certified with the American Board of Internal Medicine and is a proud member of the Texas Medical Association, the Medical Group Management Association (MGMA), the American Medical Association, the Texas Medical Directors Association, and the Dallas County Medical Society. In addition, he has received numerous awards and recognitions, including the Republican Gold Medal Award for 2002 and 2003 and the Courtesy Staff Physician at Baylor University Medical Center.

123 Welcome Our mission here at the Natural Balance Clinic is to introduce the most natural nutrition and supplements to balance the body without using medication. We believe that medication, for the most part, is not the answer for common illnesses. We believe that most diseases and illnesses happen because of the lack of healing nutrients in common food choices. We believe that medications are temporary relief of more in depth medical problems that need serious nutritional attention. We believe that healing should start from inside the body and unless we begin from inside the body, we never can treat outside symptoms because outside body pain and symptoms arise from serious internal imbalance which arise from toxins that we constantly abuse our body with, calling them "food".

Mihaela Perijoc, MD, MHA, is an eminent board-certified internal medicine physician and functional medicine specialist providing exceptional health care for patients at North Texas Internal Medicine Specialists in Plano, Texas. Dr. Perijoc has outstanding medical skills that she combines with a passion for providing the highest standard of care for her patients.

Dr. Perijoc began her career by obtaining her medical degree from the Institute of Medicine and Pharmacy (Carol Davila), Bucharest, Romania. After qualifying as a doctor, she undertook her residency in internal medicine at St. Vincent Indianapolis in Indiana. Dr. Perijoc remained at St. Vincent to complete a procedural fellowship in internal medicine.

Dr. Perijoc went on to gain valuable experience in high-profile positions at hospitals and health care institutions across Texas, honing her already considerable skills and becoming a leading advocate for raising quality standards. She developed a new model of patient care that emphasizes continuity of care and places the patient at the heart of everything she and her staff do. Dr. Perijoc continually adds to her skill set and is currently pursuing a Master in Functional Medicine degree with George Washington University in Washington, D.C.

Dr. Perijoc is a distinguished figure in her field, undertaking teaching roles at several Texas universities and holding membership of the American College of Physician Executives and the American Medical Directors Association, for whom she is a certified medical director for nursing homes. Dr. Perijoc also provides comprehensive and compassionate care and support for patients and their loved ones at hospice facilities across Texas.

Dr. Perijoc is an extraordinary physician who sets standards other medical professionals rarely match. The residents of Plano are fortunate to have a doctor of her caliber caring for their health.

Dr. Linh Ba Nguyen is a highly regarded internist, with a specialization in Sleep Medicine, practicing in the Dallas-Fort Worth Metroplex area. He and his wife Dr. Thuy Ngoc Nguyen treat their patients from the warm and comfortable Prima Health Clinic in Garland, TX.

Dr. Linh Ba Nguyen grew up in Houston and later attended the University of Dallas at Irving where he graduated Magna Cum Laude with a Bachelor’s degree in Biochemistry. He then went to the UT San Antonio Medical School and completed his internship in Internal Medicine. Dr. Nguyen transferred to the UTMB to complete his residency in Internal Medicine. He then joined the Prima Health Clinic in 1993. Dr. Nguyen is also board certified in Sleep Medicine, which he obtained in 2010.

Dr. Linh Ba Nguyen spends his spare time with the three daughters he has with his wife and is an avid runner. He has even run in marathons and a few triathlons.

Dr. Thuy Ngoc Nguyen is a leading internist in the Dallas-Fort Worth Metroplex area with a focus on Anti-Aging, Regenerative and Functional Medicine. She practices at the Prima Health Clinic in Garland, TX, with her husband, Dr. Linh Ba Nguyen. Patients of the clinic can expect their overall health and wellbeing to be cared for by highly experienced medical professionals.

Dr. Thuy Ngoc Nguyen is a native of Dallas and grew up assisting her father Dr. Thanh Nguyen at the Prima Health Clinic. She attended the University of Dallas in Irving and graduated with Bachelor’s degree as Cum Laude in Biology. She then went to the University of Texas Medical Branch in Galveston. Dr. Nguyen then returned to Dallas for her Internship and Residency training in Internal Medicine at the Presbyterian Hospital of Dallas. Dr. Nguyen then joined her husband, Dr. Linh Ba Nguyen, and father at the Prima Health Clinic in 1996.  She is devoted to early detection and determining the root cause of illnesses through functional testing. She also provides lifestyle and nutritional therapy. She is currently undergoing a Fellowship in Anti-Aging, Regenerative, and Functional Medicine.

When not practicing medicine and caring for patients, Dr. Thuy Ngoc Nguyen spends time with her three daughters.

Bhupinder Singh, MD, is a board-certified cardiologist serving patients at Heart and Vascular Care located in Plano and Mckinney, Texas. Dr. Singh is board certified in cardiovascular medicine, interventional cardiology, echocardiography, nuclear cardiology, and vascular ultrasound. 

Dr. Singh was born in Ambala, India, and grew up in Delhi, India. While teaching business organization, law, and statistics at Delhi University, Dr. Singh’s father suffered two heart attacks and underwent a coronary angiogram. Dr. Singh accompanied his father to the United States to receive a coronary artery bypass graft surgery at Texas Medical Center, becoming intimately involved in his care as he did not speak any English. Fascinated by the field of medicine and cardiology, Dr. Singh switched career paths to pursue his medical degree.

Dr. Singh completed his Bachelor of Science in biochemistry from the University of Maryland and his Doctor of Medicine from the University of Virginia. He furthered his training in internal medicine at the Cleveland Clinic, where he worked as a hospitalist for a year and continued his research in cardiology. Dr. Singh then began focusing on acute care and worked in emergency medicine in Cleveland, Ohio. Following his acute and internal medicine training, he decided to pursue his passion in cardiology at Hartford Hospital, affiliated with the University of Connecticut, where he trained in cardiovascular disease and interventional cardiology. 

After his training, Dr. Singh worked for a few years in Pittsburgh, Pennsylvania, before making Plano, Texas, his home in 2010. He previously served as Chief of Cardiology at Medical City Plano from 2019-2020. In his spare time, Dr. Singh also volunteers at the local medical camps all over the Dallas-Fort Worth Metroplex.

Dr. Singh currently works in Plano and Mckinney with his wife, Navneet, a physician assistant and Stephanie Harris, a nurse practitioner at Heart and Vascular Care. When he’s not working, Dr. Singh enjoys reading, traveling, yoga, jogging, and spending time with his family.