Catharina Ly, PA-C
Catharina Ly, PA-C is a board-certified physician assistant specializing in otolaryngology (ENT) at Capitol Breathe Free Sinus & Allergy Centers in Washington, D.C. She provides comprehensive care for patients with sinus, allergy, and general ear, nose, and throat conditions. Her work focuses on helping individuals manage their ENT concerns through attentive evaluation and personalized treatment options tailored to their needs.
Professional Background
Catharina grew up in Jacksonville, Florida and earned her Bachelor’s degree in Health Sciences from the University of Central Florida. She later completed her Master’s degree in Clinical Medical Science at Barry University in Miami, Florida.
Before transitioning to ENT, she gained two years of experience in primary care, practicing in both family and internal medicine. This experience provided her with a broad clinical foundation that she now applies in her specialty practice.
Philosophy of Care
Catharina is dedicated to providing care that puts the patient’s needs and comfort at the center. She works closely with individuals to develop treatment plans that reflect their health goals and lifestyle. Whenever possible, she recommends minimally invasive approaches based on each patient’s condition and treatment goals, helping them feel supported throughout their care.
Conditions Treated & Procedures
Catharina cares for patients with a wide variety of ear, nose, throat, and allergy conditions. She focuses on delivering thorough evaluations and treatment plans designed to meet each patient’s specific needs.
- Chronic sinusitis and recurrent sinus infections
- Nasal obstruction and deviated septum
- Seasonal and environmental allergies
- Ear infections and hearing loss
- Tinnitus evaluation and management
- Tonsil and throat conditions
- Voice and swallowing disorders
- Preventive sinus and allergy care
Personal Note
Outside of work, Catharina enjoys trying new local restaurants, traveling, practicing yoga, hiking, reading, and watching Love Island

