Opening early 2027

Never sold · Unsubscribe anytime

Conditions · Nassau County, NY

Knee
arthritis.

At a glance

Knee osteoarthritis involves changes in cartilage, bone and surrounding joint tissues that may cause pain, stiffness, swelling or difficulty walking. Institute of Function starts with diagnosis and rehabilitation, considering the least invasive effective option and procedures only when examination supports them. 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.

Knee osteoarthritis involves changes in cartilage, bone and the tissues around the joint, and it can bring pain with stairs, stiffness after rest and limits on walking distance. The severity seen on an X-ray does not always match the severity of symptoms, and many people improve meaningfully with structured nonsurgical care. A careful evaluation helps identify which options deserve a fair trial before knee replacement is considered.

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

Common causes

  • Gradual cartilage wear associated with age and cumulative load.
  • Previous meniscus or ligament injury altering joint mechanics.
  • Excess body weight increasing load across the joint.
  • Muscle weakness or movement patterns that concentrate stress in one compartment.
  • Inflammatory arthritis requiring coordinated medical assessment.

How we evaluate

History covers the pattern of pain, stiffness, swelling, previous injuries and treatments, and the activities that matter most. A hands-on osteopathic and physiatric examination assesses alignment, motion, strength, gait and the contribution of the hip and foot to knee loading. Weight-bearing X-rays and prior imaging are reviewed in context, and diagnostic ultrasound may assess selected tendon or bursa questions. The findings shape a plan that addresses symptoms and function together, with honest discussion of what each option can and cannot offer.

Treatment options
we may discuss.

  • Performance Health / rehabilitation

    Rehabilitation focuses on quadriceps and hip strength, movement retraining, weight management support and graded return to walking, stairs and sport. Strengthening and load management are among the best-supported treatments for knee arthritis. Most people can pursue nonsurgical care first; a surgical opinion about knee replacement is sought only when pain and limitation persist despite a thorough program and the person's goals truly call for it.

  • Regenerative & Cell-Based Medicine

    When appropriate, PRP may be discussed for selected knee osteoarthritis, where the evidence is more developed than for many other joints, though results vary and improvement is not guaranteed. Cell-based and biologic options require a separate review of evidence, risks and applicable law and are not assumed to regrow cartilage. Any injection is paired with rehabilitation rather than treated as a standalone fix.

  • Targeted Pain Management

    Medication review and precise, image-guided care may support the plan. Genicular nerve blocks and radiofrequency ablation may be considered for selected persistent knee pain, including when surgery is not desired or not yet appropriate. When it's needed, a steroid injection can calm a clearly inflamed knee. Hyaluronic acid may be discussed with a balanced view of its evidence. Procedures are image-guided, using ultrasound or X-ray guidance depending on the target.

Common
questions.

When to seek
care urgently.

Seek urgent medical care for a hot, swollen knee with fever, inability to bear weight after injury, or sudden calf swelling with pain.

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

Correspondence

Hear from us
before we open.

Institute of Function is preparing to open in Nassau County. Leave your email to receive our opening date and appointment availability before they're announced publicly, along with the occasional note from the Journal. We write sparingly.

Your email is never sold · Unsubscribe anytime · Privacy Policy