Common knee concerns we treat
- Pain that limits walking, lifting, or sleep
- Stiffness, swelling, or reduced range of motion
- Sports injuries: acute or overuse
- Arthritis or post-traumatic joint changes
- Conditions other doctors couldn't resolve
Trusted Knee Surgeons in Los Angeles
Your knees are an important part of being mobile, stable, and independent. When pain, injury, or arthritis limits what you can do, the right care makes all the difference.
See a specialist this week
Board-certified surgeons and podiatrists across eight Los Angeles area neighborhoods.
Book a visitOr call (323) 264-7600
What sets LAOSS apart
- Same- or next-day appointments at eight Los Angeles-area offices
- On-site imaging; PT coordinated with your in-network provider
- Conservative-first care, surgery only when needed
- Board-certified specialists, not generalists
Key takeaways
- Knee pain has many causes (meniscus, ACL, arthritis, patellar tendon), and the right treatment starts with the right diagnosis.
- Most LAOSS knee patients improve with conservative care: targeted injections, bracing, activity modification, and PT with your in-network provider.
- When surgery is needed, our specialists offer arthroscopy, ligament reconstruction, cartilage repair, and total knee replacement.
- Same-day or next-day appointments available for acute knee injuries at all eight LAOSS offices.
What is knee pain?
Knee pain is one of the most common reasons people see an orthopedist. The knee is a complex hinge that combines bone, cartilage, four major ligaments (ACL, PCL, MCL, LCL), and two menisci, and pain can come from any one of them.
The most common knee diagnoses we treat at LAOSS are meniscus tears, ligament sprains and tears, patellofemoral (kneecap) pain, articular cartilage damage, and osteoarthritis. The right treatment depends entirely on what's actually wrong, which is why we focus on accurate diagnosis (history, exam, on-site X-ray, MRI when warranted) before recommending anything else.
Most of our knee patients improve with conservative care: targeted injections, bracing, activity changes, and physical therapy with your in-network provider. When surgery is needed, our sports-medicine surgeons offer arthroscopy, ligament reconstruction (including ACL), cartilage repair, and partial or total knee replacement.
Watch: Anatomy of the Knee
The knee is the body's largest joint. It's the place where three bones meet: the tibia, the femur and the patella. The knee is a "hinge" joint. It allows the leg to bend in one direction only. Let's take a closer look at the main parts of the knee's anatomy.
Inside the knee.
The knee is the largest hinge joint in the body. Four ligaments stabilize it, two menisci cushion the load, and cartilage covers the bone surfaces. When any of these is injured or worn, you feel it as pain, stiffness, instability, or swelling.
Symptoms and causes of knee pain
Common symptoms
- ACL (anterior cruciate ligament) tears
- PCL (posterior cruciate ligament) tears
- MCL and LCL sprains/tears
- Chronic knee instability
- Meniscal tears (acute and degenerative)
- Chondromalacia patella (cartilage softening)
- Articular cartilage injuries
- Osteochondritis dissecans
Common causes
- Sudden injuries from sports, falls, or twisting movements
- Wear and tear over years of repetitive use
- Age-related joint breakdown or post-traumatic arthritis
- Overuse from running, jumping, or repetitive motion
- High-impact trauma from accidents, falls, or contact sports
How we diagnose knee pain
Knee pain, swelling, or instability can disrupt your daily routine, whether it develops gradually from arthritis or comes suddenly after a sports injury. At LAOSS, our doctors are skilled in diagnosing complex problems involving the knees.
We know how important it is to get clear answers quickly. That’s why our diagnostic process is both thorough and efficient, with most patients leaving their first visit with a diagnosis and treatment plan in hand. Here’s what you can expect at your initial evaluation with us:
- Detailed history: when it started, what makes it better or worse, what you’ve already tried
- Focused exam of the knee: range of motion, stability, strength, specific provocation tests
- On-site imaging at most offices: X-ray for bone, ultrasound or MRI when soft-tissue detail is needed
- A written plan with options ranging from conservative care to surgical procedures, in plain English
Your evaluation is the first step toward the right solution. Set up your evaluation today to start getting expert care with our team of specialists.
Knee procedures performed by our doctors
Knee pain or injury can make everyday activities like walking, climbing stairs, or playing sports feel like a challenge. At LAOSS, our knee procedures are designed to relieve pain, restore function, and stabilize or repair the joint. From conservative therapies to advanced surgical solutions, we tailor treatment to each patient’s unique needs. The following are the non-surgical and surgical knee treatments we perform:
Conservative care
Step 1Conservative care first
Non-surgical options designed to relieve pain, restore movement, and avoid the OR when possible.
- Steroid Injections
- Bracing & Splinting
- Casting
- Physical Therapy
- PRP Injections
- Viscosupplementation (Gel Injections)
Surgical care
When neededSurgical options when needed
Minimally invasive and reconstructive procedures performed by board-certified orthopedic surgeons.
- Knee Arthroscopy
- ACL & PCL Reconstruction
- Meniscus Repair or Removal (Meniscectomy)
- Cartilage Restoration Procedures
- Partial or Total Knee Replacement
- Fracture Repair & Fixation
- Realignment Procedures (Osteotomy)
Why experience matters.
Why experience matters
Knee care is highly technique-dependent. Volume, training, and judgment together determine the outcome you actually feel six months later.
- Precise diagnosis from imaging and exam
- Conservative-first care that avoids unnecessary surgery
- Surgical technique refined over thousands of cases
- On-site imaging + coordinated PT through your in-network provider
The LAOSS approach
Our knee specialists move stepwise: start with the least-invasive option that fits your situation, escalate only when it doesn't.
- Same-day imaging at most offices
- PT coordinated in your insurance network
- Board-certified surgeons performing the procedures themselves
- Direct access to your specialist between visits
Am I a candidate?
If most of these match your situation, an evaluation with a knee specialist is the next step.
You may be a candidate if
These signs typically point toward an in-person evaluation with a knee specialist.
- Pain or stiffness in the knee that lasts more than a few days
- Swelling, instability, or noticeable change in function
- Symptoms that limit walking, lifting, sleep, or work
- Previous treatment that didn't fully resolve the problem
- Imaging or exam findings that suggest an underlying issue
What evaluation includes
Your first visit is built to give you an answer the same day, not just another referral.
- Detailed history: onset, mechanism, what makes it better or worse
- Hands-on exam focused on the affected joint or region
- On-site imaging at most offices (X-ray, ultrasound)
- Clear plan with options ranging from conservative to surgical
- Same-day or next-day scheduling for any follow-up tests
ImportantSeek urgent evaluation for sudden severe pain, numbness, progressive weakness, or any sign of infection (fever, increasing redness or swelling).
Your knee recovery roadmap.
Recovery is rarely a straight line, but a clear plan with measurable milestones makes the path predictable.
- Days 0 to 14
Right after care
In the first two weeks we focus on protecting the knee, calming inflammation, and restoring basic motion.
- Activity modification with clear do/don't guidance
- Ice, elevation, and pain control as needed
- Gentle range-of-motion within safe limits
- Follow-up scheduled to track healing
- Weeks 2 to 8
Rehabilitation
Targeted physical therapy rebuilds strength, mobility, and confidence in the knee.
- Progressive strengthening and neuromuscular work
- Manual therapy and soft-tissue treatment
- Sport- or job-specific movement re-training
- Coordinated PT through your in-network provider
- Months 2+
Long-term care
Once function is restored, the focus shifts to keeping you there, and catching any recurrence early.
- Return-to-activity plan with measured benchmarks
- Home program tailored to your sport or job
- Maintenance visits or imaging if symptoms change
- Direct line back to your specialist if needed
Risks & considerations
What to weigh before you decide.
We talk through the risks and benefits with every patient. Informed consent is a conversation, not a form.
General considerations
Every orthopedic intervention carries a small set of standard risks. We screen, prepare, and monitor for these on every patient.
- Infection (rare with modern technique and prophylaxis)
- Bleeding or bruising at the treatment site
- Reaction to anesthesia or medications
- Need for additional procedures in some cases
Knee considerations
Some risks are tied to the structures we're treating in the knee. We discuss these in detail at your visit so you can weigh them against the benefits.
- Temporary stiffness or weakness during recovery
- Incomplete pain relief in a small percentage of cases
- Nerve or vessel irritation near the treatment area
- Need for follow-up therapy to fully restore function
Meet the knee specialists at LAOSS
At LAOSS, you’ll find personalized, accessible knee care led by board-certified orthopedic surgeons with deep expertise in sports injury treatment, cartilage restoration, and arthritis management. From your first evaluation through treatment, our knee specialists will provide expert guidance to restore mobility, relieve pain, and help you feel your best.
Meet your knee specialists.
Compare up to 34 providers
Accepting new patients
Hayk Stepanyan, MD
Total Joint & Sports Medicine
- Glendale
- Santa Fe Springs
- East Los Angeles
From our Google reviews
Read all 9,626 reviews on GoogleWhat patients say
“Dr. Stepanyan was a great doctor and surgeon he did both left and right knees surgery. He has been there every step of the way on the recovery and has great assistance that help if needed.”
Adriana V.Google reviewJul 2026
“…I've visited three clinics where Dr. Michael Perrone has his practice. He's very professional and I highly recommend him. He performed surgery on my right knee, and I'm currently recovering and doing very well.”
Norma J.Google reviewSanta Fe SpringsApr 2026
“The service in general is excellent, and Dr. Felipe especially helped me with my knee pain. I feel much better now, no pain at all, thank you. …”
Yasmin O.Google reviewEast Los AngelesMar 2026
“Dr. Hayk is a compassionate, caring, dedicated and committed professional. Love the results of my knee surgery. On recovery now but Thank Dr. for taking the time to help me when I really needed it. …”
Jimmy R.Google reviewMay 2026
Selected 5-star reviews from Google, shown as written. Individual results vary.
Common knee questions
- An orthopedic knee specialist has advanced training in diagnosing and treating conditions affecting the knee’s bones, ligaments, cartilage, and soft tissues. They provide both non-surgical and surgical treatments, including complex procedures like ligament reconstruction or joint replacement. A general doctor can evaluate symptoms but typically refers patients to a specialist for advanced or long-term knee care.
Don't wait on pain.
Book a visit with a knee specialist at any of our eight Los Angeles-area offices.
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21 specialists · 8 offices
Greater Los Angeles
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