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Walter Ryan is an allergist professional located in Nashua, NH. They specialize in internal medicine, allergy & immunology. With over 20 years of experience, they bring deep expertise to every client.
Walter Ryan holds an active professional license for your protection.
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Walter Ryan is an allergist based in Nashua, NH, with 20 years of experience in the field. He holds a DO credential, indicating training in osteopathic medicine. His license number is 24463. Ryan brings two decades of clinical experience to allergy diagnosis and treatment.
Walter Ryan holds a DO credential, which stands for Doctor of Osteopathic Medicine. This designation means he completed medical school training with an additional focus on osteopathic principles—a branch of medicine that emphasizes the relationship between body structure and function. DOs receive full medical training comparable to MDs and can prescribe medications, perform surgery, and specialize in any medical field, including allergy and immunology. The DO credential signals completion of accredited osteopathic medical education and licensing requirements.