Delaware Valley Allergy, formerly known as Thomas E. Klein MD PC, is a medical practice serving patients in the Delaware Valley with allergy, asthma, and related care. Its board-certified physicians and nurse practitioners care for patients of all ages, helping them manage symptoms and participate more comfortably in daily activities at work, school, and sports. The practice emphasizes compassionate service, clear communication, patient education, and strong relationships between patients and providers. It also coordinates with primary care physicians and other providers when needed.

Services include evaluation of allergy symptoms, individualized allergy treatments, asthma management, and pulmonary function testing to assess lung health. The practice provides educational resources and written instructions to help patients understand their conditions and care plans. Patients can request appointments, access a patient portal, and pay bills online. Delaware Valley Allergy lists offices in Havertown and at Riddle Hospital in Media. The practice notes that Riddle Hospital is the best location for patients needing handicapped accommodations.