Welcome to American Pain Institute! At American Pain Institute in Portsmouth, New Hampshire, every patient is heard. Whether you are suffering from chronic back pain or a recent injury, you will be treated with dignity and respect throughout the process of assessment, diagnosis and treatment. American Pain Institute will provide you with the quality and accessible pain management care you deserve.

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If you suffer from chronic pain, your journey to our practice may have been a long one. You may have felt that previous doctors didn't hear your concerns or understand how you feel. At American Pain Institute, we specialize in pain management and we hear you. Patients in Portsmouth, NH and beyond trust our clinic for competent, compassionate care utilizing the latest research and technology in pain medicine.

No matter what the cause of your pain, we can help. We specialize in treating headaches, fibromyalgia, reflex sympathetic dystrophy, trigeminal neuralgia, and pudendal neuralgia. We also treat pain caused by cancer, nerve damage, herniated discs, and arthritic joints. In addition, we offer regenerative medicine as an option for certain chronic pain patients. 

Contact us today at 603-766-8500 to learn more and schedule an appointment.

Joshua Greenspan, MD – The best doctors combine a deep sense of compassion for their patients with the knowledge and skills to give them the care they need. Dr. Greenspan displays both of these qualities in every interaction with his patients. After attending SUNY Health Science Center for medical school, he pursued his calling to pain medicine through a residency in anesthesiology at New York Presbyterian Hospital, followed by a fellowship in pain management. Dr. Greenspan is board-certified in both anesthesiology and pain management and was the Director of Pain Management at Long Island College Hospital, Downstate Hospital, and Lutheran Medical Center prior to joining American Pain Institute.

Our doctors specialize in the treatment of chronic, intractable pain.

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Our State-of-the-Art facility was built with our patients’ comfort in mind.

We understand the nervousness and apprehension that sometimes accompanies patient visits and also recognize that people in pain can be more sensitive to sensory stimulation. We make every effort to alleviate our patients’ discomfort by providing a soothing, comfortable environment.

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