Opening early 2027

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Institute of Function

Treatments · Long Island, NY

Pain management,
diagnosis first.

At a glance

A pain management physician identifies the source of persistent pain and builds a plan to restore function, using rehabilitation, medication review and image-guided procedures when examination supports them. Institute of Function starts with diagnosis, repair first and surgery last. Dr. Benjamin (Ben) Klyachman, D.O., board-certified in pain medicine and physical medicine and rehabilitation, leads care at Institute of Function in Nassau County, NY, which welcomes patients from across Long Island, New York City and beyond.

Pain management is the medical care of persistent pain in the spine, joints, muscles and nerves. Institute of Function opens in Nassau County in early 2027, with care led by a physician trained in both physical medicine and rehabilitation and interventional pain management. Every plan starts with an accurate diagnosis.

Medically reviewed by Dr. Ben Klyachman, D.O. · Updated October 21, 2026

What a pain management physician does

A pain management physician finds out why something hurts before deciding how to treat it. The history, a hands-on examination and a review of prior imaging and care come first. Repair comes first: rehabilitation, movement and the least invasive effective option. Medication review and image-guided procedures are considered when the examination supports them, steroids only when they are needed, and surgery is reserved for when it is truly needed.

Conditions we evaluate

Care covers pain in the back, neck, joints, tendons and nerves, as well as headache, pelvic pain and pain after injury or surgery. Each condition page explains common causes, how evaluation works and where rehabilitation, regenerative care and targeted procedures may fit.

Procedures we perform

We perform image-guided procedures using ultrasound or X-ray guidance depending on the target, and physician-performed nerve testing. Each procedure is chosen to answer a diagnostic question or to create a window in which rehabilitation can work, never as a default.

How PM&R and interventional training fit together

Physical medicine and rehabilitation, or physiatry, focuses on movement, function and the nerves and muscles that support them. Interventional pain training adds precise, image-guided procedures. Together they let one physician examine how you move, test nerve function when it helps, place a targeted injection when it is warranted, and guide the rehabilitation that follows.

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Common
questions.

Related conditions

Related treatments

From the Journal

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This page is general information, not medical advice. Individual results vary. Medical Disclaimer

Correspondence

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