Dr. Diego DiazMD
Internal Medicine
at Dr. Diego Diaz Concierge Program (Castle Connolly Private Health Partners) — New York, NY
About
Dr. Diego Diaz brings deep clinical range to his New York concierge practice. He completed his medical residency in Primary Care Medicine at Yale University, then stayed on as Chief Resident for a year to build expertise in health systems management. He later moved to New York City to complete a fellowship in Pulmonary Medicine at Weill Cornell. That subspecialty drew him in because it allowed him to maintain long-term relationships with patients managing chronic disease. He also received training in Sleep Medicine, with a particular focus on sleep deficiency and its effects on cognitive and cardiopulmonary function.
Dr. Diaz spent 20 years caring for patients in medical and cardiothoracic intensive care units. That experience gave him a thorough understanding of advanced disease and its complications. He now applies that knowledge to preventive care in the outpatient setting. He integrates internal medicine, pulmonary care, and sleep medicine into a unified practice. He relies on careful listening and candid communication with patients, families, and consulting specialists. Born in Medellin, Colombia, Dr. Diaz speaks English and Spanish fluently. Outside of medicine, he enjoys cooking for family and friends, international travel, and reading fiction.
Education & Training
Residency
Primary Care Medicine, Yale University (served as Chief Resident)
Fellowship
Pulmonary Medicine, Weill Cornell
Additional Training
Training in Sleep Medicine
Languages
English, Spanish
Conditions Treated
Who is Dr. Diaz right for?
Dr. Diaz is a strong fit for adults seeking a primary care physician with deep subspecialty expertise in pulmonary and sleep medicine. Patients managing chronic respiratory conditions, sleep disorders, or complex cardiovascular health benefit from his ICU-level clinical background. He works well with patients who want a proactive, prevention-focused approach to long-term health. Spanish-speaking patients find him particularly accessible given his fluency. Those who value candid, direct communication with their physician tend to thrive under his care.
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Frequently Asked Questions
Dr. Diaz specializes in internal medicine, pulmonary medicine, sleep medicine, and preventive care. He treats chronic respiratory conditions, sleep disorders including sleep deficiency, and complex medical conditions that benefit from a prevention-focused approach. His 20 years in medical and cardiothoracic intensive care units give him a deep clinical foundation for managing advanced and chronic disease in the outpatient setting.
Dr. Diaz spent 20 years in medical and cardiothoracic intensive care units. That experience gave him a thorough understanding of how serious illness develops and progresses. He now applies that knowledge proactively, helping patients address risk factors before they escalate. His approach emphasizes catching problems early through advanced diagnostics and personalized preventive planning.
Yes, Dr. Diaz received specialized training in Sleep Medicine. He focuses on sleep deficiency and its effects on cognitive and cardiopulmonary function. He integrates sleep health into his broader approach to preventive and internal medicine.
Dr. Diaz speaks English and Spanish fluently. He was born in Medellin, Colombia, and brings a native fluency to his Spanish-speaking patients. This allows him to communicate clearly and directly with a broader range of patients in New York City.
Dr. Diaz completed his medical residency in Primary Care Medicine at Yale University, where he also served as Chief Resident. He then completed a fellowship in Pulmonary Medicine at Weill Cornell in New York City. He also received specialized training in Sleep Medicine.
Dr. Diaz chose pulmonary medicine because it allowed him to build long-term relationships with patients managing chronic disease. He values continuity of care and saw pulmonology as a specialty where those ongoing relationships could meaningfully improve patient outcomes.
Dr. Diaz relies on careful listening and candid communication with patients, families, and consulting specialists. He believes transparent dialogue is essential to good preventive care. His approach ensures that patients understand their health status and feel informed about their options.
Yes, Dr. Diaz integrates internal medicine, pulmonary care, and sleep medicine into a unified practice. Rather than treating each specialty in isolation, he looks at the full picture of a patient's health. This approach is particularly valuable for patients with overlapping chronic conditions.
Doctor profile last updated March 21, 2026