Stem wave therapy (often branded as StemWave or SoftWave) is generally not covered by insurance. Most major insurers classify extracorporeal shockwave therapy for musculoskeletal conditions as experimental or unproven, and Medicare does not cover it at all. With sessions ranging from $100 to $500 each and a typical course requiring 8 to 12 treatments, the out-of-pocket cost can add up to $800 to $6,000.
What Stem Wave Therapy Actually Is
Stem wave therapy is a branded form of extracorporeal shockwave therapy (ESWT), which sends acoustic pressure waves into injured tissue. Clinics market it for joint pain, tendinitis, plantar fasciitis, and other musculoskeletal problems, often claiming it activates the body’s own stem cells to promote healing. From an insurance standpoint, it falls under the same category as other shockwave devices, and that’s where coverage gets complicated.
The FDA has cleared certain shockwave devices, but the approved uses are narrow. The SoftWave OW100S device, for instance, received FDA clearance in September 2023 specifically for treating chronic diabetic foot ulcers and superficial partial-thickness second-degree burns in adults 22 and older. It was not cleared for the knee pain, back pain, or tendinitis that most clinics advertise. That gap between how these devices are marketed and what regulators have actually approved is a major reason insurers push back on coverage.
Where Medicare Stands
Medicare considers high-energy ESWT “not reasonable and necessary” for the treatment of musculoskeletal conditions. That language, pulled directly from the Medicare coverage database, means it won’t pay for shockwave therapy used on shoulders, elbows, knees, heels, or any other joint or soft tissue complaint. This applies to both traditional Medicare Part A and Part B. There is no national coverage determination that makes an exception for branded versions like StemWave.
Because Medicare sets the tone for many other payers, its position has a ripple effect. Medicare Advantage plans, which are administered by private insurers but follow Medicare rules, typically adopt the same exclusion.
How Private Insurers Handle It
The picture with private insurance is almost as restrictive, with one notable exception.
UnitedHealthcare, the largest private insurer in the U.S., considers ESWT “unproven and not medically necessary for any musculoskeletal or soft tissue indications.” That policy applies whether the device delivers low-energy, high-energy, or radial shockwaves, covering essentially every version of the technology on the market.
Aetna takes a slightly different approach. It classifies ESWT as medically necessary for one specific condition: calcific tendinopathy of the shoulder. To qualify, you need a calcium deposit of at least 1 centimeter that has been present for six months or longer, and you must have already tried conservative treatments like rest, ice, and anti-inflammatory medications without improvement. For every other musculoskeletal use, Aetna treats shockwave therapy the same way UnitedHealthcare does.
Other major carriers, including Cigna and Blue Cross Blue Shield affiliates, tend to follow similar patterns. Most either exclude ESWT entirely or limit coverage to very specific, narrowly defined conditions that don’t overlap with the way most clinics use stem wave devices.
Why Insurers Deny Coverage
Insurance companies base coverage decisions on whether enough clinical evidence supports a treatment for a given condition. For shockwave therapy applied to common complaints like plantar fasciitis, tennis elbow, or chronic back pain, insurers have repeatedly concluded that the published research doesn’t meet their threshold. The conditions that stem wave clinics most commonly treat are precisely the ones insurers consider insufficiently supported by evidence.
The branding matters here, too. When a clinic calls the treatment “stem wave therapy” rather than ESWT, it can create confusion. But insurance companies evaluate the underlying technology, not the marketing name. A claim submitted for shockwave therapy will be reviewed against the insurer’s ESWT policy regardless of what the clinic calls it.
What You’ll Actually Pay
Because insurance rarely covers this treatment, most patients pay entirely out of pocket. Individual sessions typically cost between $100 and $500, with the price varying based on the provider, geographic location, and which body part is being treated. Clinics generally recommend 8 to 12 sessions for chronic issues, which puts total treatment costs somewhere between $800 and $6,000.
Some clinics offer package pricing or payment plans to make the cost more manageable. A few accept health savings accounts (HSAs) or flexible spending accounts (FSAs), which at least allow you to pay with pre-tax dollars. It’s worth asking about these options before starting treatment.
Steps to Check Your Own Coverage
Even though the odds are low, your specific plan might have different terms. Here’s how to find out before committing:
- Call your insurer directly. Ask whether ESWT or extracorporeal shockwave therapy is covered under your plan for the specific condition you’re treating. Use the clinical name, not “stem wave,” so the representative can locate the correct policy.
- Request a predetermination. This is a formal coverage review before treatment begins. Your provider submits the diagnosis and proposed treatment, and the insurer responds with a coverage decision in writing.
- Ask the clinic about billing codes. ESWT has specific procedure codes that insurers recognize. If the clinic plans to bill under a different code, that could lead to a denied claim or an unexpected bill later.
- Check for prior authorization requirements. Even in the rare cases where a plan covers ESWT, you may need approval before the first session. Skipping this step can result in the entire cost falling to you.
If your insurer denies coverage and you believe the treatment is medically necessary, you have the right to appeal. Appeals are more likely to succeed when your doctor can document that you’ve exhausted standard treatments like physical therapy, medications, and corticosteroid injections over a period of several months.