Understanding Class 4 Laser Therapy
Class 4 laser therapy uses focused light energy to stimulate cellular activity and increase blood flow. This non-invasive treatment, also known as photobiomodulation, delivers higher power output than cold lasers, allowing deeper tissue penetration and more effective results for pain relief and healing.
Research published by the National Institutes of Health shows that Class 4 lasers can significantly increase blood flow to treated areas, supporting the body's natural repair processes. For a detailed explanation of how this therapy works, see the safety and efficacy of Class 4 laser therapy.
- Stimulates cellular repair and regeneration
- Increases local blood circulation
- Reduces inflammation and pain
- Accelerates tissue healing
Unlike cold (Class 3) lasers, Class 4 devices deliver higher wattage, making them suitable for treating deeper musculoskeletal conditions. Chiropractors at Southeast Chiropractic use this advanced technology to address chronic pain, sports injuries, and postural issues.
What is Class 4 Laser Therapy?
Class 4 laser therapy is a non-invasive medical treatment that uses high-power laser light to stimulate healing in damaged tissues. The FDA cleared these devices for clinical use in 2003, and they operate at power outputs exceeding one watt, distinguishing them from lower-class lasers.
Class 3 vs Class 4 Lasers
Class 3 (Cold Laser). Operates below 500 milliwatts (under one watt). Delivers light energy to superficial tissues only, such as skin and surface nerves. Produces no heat.
Class 4 Laser. Delivers power above 500 milliwatts, often reaching several watts. Penetrates 5 to 10 centimeters below the skin, reaching deep muscles, joints, and spinal structures. Generates gentle therapeutic heat.
How Photobiomodulation Works
The therapy relies on photobiomodulation: photons of light are absorbed by chromophores in the mitochondria, stimulating adenosine triphosphate (ATP) production. This increases cellular energy, accelerates repair, reduces inflammation, and improves blood flow. The same mechanism underlies both Class 3 and Class 4 devices, but the higher power of Class 4 lasers allows energy to reach deeper tissues in shorter sessions — typically 5 to 15 minutes.
For patients seeking drug-free pain relief, practices like Southeast Family Chiropractic integrate Class 4 laser therapy with chiropractic adjustments, offering a non-surgical option for conditions such as arthritis, tendinitis, and sports injuries. The approach aligns with evidence showing that combining laser treatment with manual therapy can improve outcomes compared to either intervention alone.
Deep Penetration and the Science Behind It
The defining advantage of Class 4 laser therapy is its ability to deliver therapeutic energy deep into the body. While lower-level lasers treat only surface tissues, a Class 4 laser can penetrate five to ten centimeters or more beneath the skin, reaching muscles, joints, and nerves that are otherwise inaccessible to light-based treatments.
This depth is achieved through specific near-infrared wavelengths, typically between 810 nm and 1064 nm. These wavelengths pass through skin and fat with minimal absorption, allowing the energy to reach deeper structures. Wavelengths around 810 nm are particularly effective at stimulating mitochondrial ATP production, while 915 nm and 1064 nm wavelengths offer even greater penetration for treating large joints and spinal tissues.
Professional calibration is essential because very high-power near-infrared light can be absorbed by water in the skin, which limits depth if not properly adjusted. At Southeast Chiropractic, each session is tailored to the patient's condition, ensuring the correct wavelength and power are used to target the affected area without unnecessary surface heating.
What Happens During a Session?
A Class 4 laser therapy session begins with a brief assessment of the area being treated. The practitioner identifies the target tissue, adjusts the laser parameters to match the condition, and provides protective eyewear for everyone in the room.
The handheld laser applicator is then moved in a continuous pattern over the skin above the injured or painful area. Patients typically feel a gentle, soothing warmth as the light energy penetrates deeper tissues — there is no pain or discomfort during the process. Most sessions last between 10 and 30 minutes, depending on the size of the area and the severity of the condition.
Many patients report a sense of immediate relaxation and noticeable relief after their first session. For lasting results, a series of treatments is usually recommended, and the therapy can be combined with chiropractic adjustments during the same appointment, as is common at Southeast Family Chiropractic.
Frequency, Cost, and Insurance Considerations
For acute pain and inflammation, laser therapy is typically recommended daily for two weeks. After that initial period, the frequency often tapers off to two to three sessions per week, then weekly as symptoms improve. Chronic conditions may require a more gradual schedule.
Because Class 4 lasers deliver more energy per session than cold lasers, most patients need fewer treatments overall. That can reduce the total cost of care, even if the per-session price is higher.
Per-session costs for Class 4 laser therapy typically range from $50 to $150, with most patients paying between $75 and $125. Premium systems may charge $100 to $200 per session.
Insurance coverage for laser therapy varies significantly by plan. Some major commercial insurers, including Aetna, Anthem BCBS, Cigna, and UnitedHealthcare, may reimburse certain applications, but coverage is not universal. Medicare generally does not recognize HCPCS code S8948 for low-level laser therapy, though some Medicare Advantage plans may offer limited pain management benefits. Patients should verify their specific plan details before starting treatment.
At Southeast Family Chiropractic, our team works with each patient to develop a personalized treatment schedule and helps verify insurance benefits before any session begins. We provide clear cost estimates upfront so there are no surprises.
Potential Side Effects and Safety
Class 4 laser therapy is considered safe when administered by trained professionals. Side effects are rare and generally mild — some patients may experience temporary redness, warmth, or a sensation of increased blood flow in the treated area. These effects typically fade quickly after the session.
Patients with sensitive skin, eyes, or light sensitivity should inform their doctor beforehand so that precautions can be taken. Protective eyewear is mandatory for both the patient and practitioner during treatment.
Not everyone can buy a Class 4 laser. These devices require professional training and appropriate equipment to operate safely, and they are not available for over-the-counter purchase.
Effectiveness and Integration with Chiropractic Care
Chiropractic laser therapy, also known as photobiomodulation, is a legitimate, evidence-supported treatment. Research has demonstrated that combining Class 4 laser therapy with chiropractic spinal manipulation can produce better outcomes than either approach alone.
Dr. Mark Pfefer, Director of Research at Cleveland University-Kansas City, notes that initial research has shown combining low-level laser with chiropractic spinal manipulation may be associated with improvement in outcomes compared with a single intervention. This combination is especially valuable for patients with severe pain, offering a non-drug path to relief.
At Southeast Chiropractic, personalized treatment plans integrate Class 4 laser with spinal adjustments and rehabilitative exercises to target chronic pain, inflammation, and stiffness. Whether used as a standalone therapy or alongside other modalities, the approach is tailored to each patient's specific condition for optimal recovery.
Preparing for Your First Session
Your first session with Class 4 laser therapy will be non-invasive, painless, and focused on delivering deep-reaching light energy to the affected tissues. At Southeast Family Chiropractic, each treatment plan is tailored to your specific condition and recovery goals.
Patients typically experience reduced pain, less inflammation, and faster healing after a short series of sessions. To learn how this therapy can address your needs, schedule a consultation and discuss your condition with our team.
