Sacroiliac joint pain is treated by several types of doctors depending on the cause and severity, and most people see more than one specialist over the course of diagnosis and treatment. Primary care physicians and physiatrists (physical medicine and rehabilitation doctors) typically handle the initial evaluation. From there, you might be referred to a physical therapist, an interventional pain management specialist, a rheumatologist, or an orthopedic or neurosurgeon. An international consensus guideline describes SI joint pain as a “multifarious condition” best served by an interdisciplinary, multimodal treatment plan.1Regional Anesthesia & Pain Medicine. Consensus practice guidelines on sacroiliac joint complex pain from a multispecialty, international working group Understanding which specialist does what can save you months of frustration.
Where Most People Start
Your primary care doctor or a physiatrist is usually the first clinician to evaluate SI joint pain. The challenge at this stage is that SI joint dysfunction mimics other common causes of low back and buttock pain, including lumbar disc problems and hip conditions. A good initial workup involves a focused physical exam to narrow down whether the SI joint is actually the source of your symptoms.
Physiatrists deserve special mention because their entire specialty revolves around musculoskeletal function and pain. They are trained to distinguish SI joint pain from hip, spine, and muscle-related problems without immediately jumping to imaging or procedures. For pregnancy-related pelvic girdle pain, which frequently involves the SI joint, a proposed clinical care pathway recommends that a general practitioner or midwife make a preliminary diagnosis and then refer to a physiatrist for definitive assessment.2PubMed Central. Pelvic Girdle Pain during or after Pregnancy: a review of recent evidence and a clinical care path proposal That model applies more broadly: your primary care clinician identifies the likely problem, and a specialist confirms and manages it.
How SI Joint Pain Gets Diagnosed
Before you can get to the right specialist, someone has to confirm that the SI joint is the actual pain generator. This is harder than it sounds. There is no single definitive test, so clinicians rely on a combination of hands-on provocative maneuvers and, when needed, diagnostic injections.
The standard diagnostic approach uses a cluster of five physical exam tests: the FABER test, compression, distraction, thigh thrust, and Gaenslen’s test. SI joint pain is considered likely when at least three of the five are positive, and one of those three should be either the thigh thrust or the compression test.3PubMed Central. Successful Diagnosis of Sacroiliac Joint Dysfunction Research comparing this multi-test approach against fluoroscopically guided diagnostic injections confirmed that three or more positive tests reliably indicates SI joint pain.4PubMed. A multitest regimen of pain provocation tests as an aid to reduce unnecessary minimally invasive sacroiliac joint procedures
When the physical exam is equivocal or a procedure is being considered, a diagnostic SI joint block becomes the next step. This involves injecting a local anesthetic directly into the joint under fluoroscopic or CT guidance. Although there is no universally accepted gold standard, the diagnostic block is widely regarded as the most useful confirmatory tool for SI joint-mediated pain.5PubMed Central. Use of Diagnostic Injections to Evaluate Sacroiliac Joint Pain If your pain drops substantially after the injection, the SI joint is confirmed as the source. Proposed diagnostic criteria tie these approaches together: pain in the area of the SI joint, reproducible pain with provocative maneuvers, and pain relief with a local anesthetic injection.6PubMed Central. A Review and Algorithm in the Diagnosis and Treatment of Sacroiliac Joint Pain
Any of the specialists mentioned in this article can perform provocative tests in the office. Diagnostic injections, however, are performed by interventional pain physicians, physiatrists with procedural training, or radiologists, since the procedure requires image guidance.
Physical Therapists and Exercise-Based Treatment
Physical therapists are often the first treatment providers you will see after a diagnosis, and for many people they are the only provider needed. A systematic review found that physiotherapy interventions are effective at reducing pain and disability from SI joint dysfunction, with manual manipulation being the most commonly used and most effective approach within physical therapy clinics. Exercise and kinesio taping also showed benefits for pain, disability, and pelvic alignment.7Journal of Physical Therapy Science. The effectiveness of physiotherapy interventions for sacroiliac joint dysfunction: a systematic review
A randomized trial directly comparing manipulation to stabilization exercises in patients with SI joint dysfunction found that both groups improved significantly in pain and disability scores.8PubMed. Comparison of manipulation and stabilization exercises in patients with sacroiliac joint dysfunction patients: A randomized clinical trial This is good news if you are not comfortable with joint manipulation or if a therapist prefers a core-stability approach. The evidence suggests you can get better either way.
A meta-analysis of randomized controlled trials offered a more nuanced picture of manual therapy specifically. Compared to non-manual physiotherapy approaches like exercise with or without passive modalities, SI joint manual therapy did not significantly reduce pain on its own but did have a moderate effect on reducing disability.9PubMed Central. Efficacy of manual therapy for sacroiliac joint pain syndrome: a systematic review and meta-analysis of randomized controlled trials The practical takeaway is that manual therapy and exercise work best together rather than as competing options. A physical therapist who combines hands-on work with a targeted home exercise program is likely giving you the strongest available conservative treatment.
Interventional Pain Management Specialists
When physical therapy alone does not resolve symptoms, an interventional pain management specialist is typically the next step. These doctors are usually anesthesiologists, physiatrists, or neurologists who have completed additional fellowship training in pain procedures. They perform the diagnostic injections described earlier and also deliver a range of therapeutic interventions.
Corticosteroid injections into the SI joint are a common first-line procedure. If these provide temporary relief but the pain returns, the conversation usually turns to radiofrequency ablation, a procedure that uses heat to disrupt the nerves carrying pain signals from the joint. One technique, cooled radiofrequency ablation of the sacral lateral branches, has shown particularly durable results. In a large case series, roughly 86% of patients experienced at least a 50% drop in pain scores at four to six months, about 71% maintained that level of relief at six to twelve months, and nearly half still had it beyond twelve months. Quality-of-life improvements persisted in some patients at twenty months, and opioid use decreased in the majority.10PubMed. Use of cooled radiofrequency lateral branch neurotomy for the treatment of sacroiliac joint-mediated low back pain: a large case series
A systematic review of randomized controlled trials supported radiofrequency ablation as an intervention for chronic SI joint pain for periods up to one year after treatment.11PubMed Central. Radiofrequency Ablation as an Effective Long-Term Treatment for Chronic Sacroiliac Joint Pain: A Systematic Review of Randomized Controlled Trials Another study reported that patients achieved greater than 50% pain reduction at three, six, and twelve months after the procedure.12Pain Physician. A New Radiofrequency Ablation Procedure to Treat Sacroiliac Joint Pain Because nerves can regenerate over time, some patients need repeat treatments after a year or two, but this is generally considered a success rather than a failure of the procedure.
When to See a Rheumatologist
Not all SI joint pain is mechanical. If your doctor suspects an inflammatory cause, a rheumatologist becomes essential. The spondyloarthropathies are a group of chronic inflammatory rheumatic diseases, and ankylosing spondylitis in particular is a condition that primarily affects the SI joints.13Rheumatology. Treatment of ankylosing spondylitis and extra-articular manifestations in everyday rheumatology practice Inflammatory SI joint disease tends to present differently from mechanical dysfunction. It often starts before age 40, causes morning stiffness lasting more than 30 minutes, improves with activity rather than rest, and can wake you from sleep.
Rheumatologists use blood tests such as HLA-B27 and inflammatory markers alongside MRI to look for characteristic bone marrow edema in the SI joints. Recent research has identified two predominant patterns of bone marrow edema in axial spondyloarthritis: an upper pattern associated with higher body mass index and psoriasis, and a lower pattern associated with HLA-B27 positivity and male sex.14PubMed. Two patterns of sacroiliac joint bone marrow oedema are apparent in AxSpA determined by HLA-B27 status, body mass index or psoriasis These patterns hint at different disease mechanisms, but the practical point for you is that inflammatory SI joint pain requires a fundamentally different treatment approach from mechanical pain. Rheumatologists manage it with biologic medications and disease-modifying drugs, not with the injections and physical therapy that work for mechanical dysfunction.
If you have SI joint pain combined with a family history of autoimmune conditions, psoriasis, inflammatory bowel disease, or persistent eye inflammation, push for a rheumatology referral even if your primary care doctor initially suspects a mechanical cause.
Orthopedic and Neurosurgeons for SI Joint Fusion
Surgery is a last-resort option reserved for patients with confirmed SI joint dysfunction who have not responded to conservative treatment or minimally invasive procedures. Minimally invasive SI joint fusion is indicated for pain due to degenerative sacroiliitis or SI joint disruption.15PubMed Central. Minimally Invasive Sacroiliac Joint Fusion: A Lateral Approach Using Triangular Titanium Implants and Navigation Both orthopedic spine surgeons and neurosurgeons perform this procedure.
The surgical evidence is stronger than many people expect. A randomized controlled trial comparing minimally invasive SI joint fusion to nonsurgical management found six-month success rates of about 81% in the surgical group versus 26% in the nonsurgical group. Clinically meaningful improvement in disability occurred in roughly 73% of fusion patients compared to about 14% in the nonsurgical group.16PubMed Central. Randomized Controlled Trial of Minimally Invasive Sacroiliac Joint Fusion Using Triangular Titanium Implants vs Nonsurgical Management for Sacroiliac Joint Dysfunction: 12-Month Outcomes Two-year follow-up from the same trial showed that improvements in pain, disability, and quality of life persisted.17PubMed Central. Two-Year Outcomes from a Randomized Controlled Trial of Minimally Invasive Sacroiliac Joint Fusion vs. Non-Surgical Management for Sacroiliac Joint Dysfunction
That said, the nonsurgical comparison group in these trials was managed conservatively without procedures like radiofrequency ablation, so the gap between surgery and a full course of interventional pain management may be narrower than the raw numbers suggest. Surgery makes the most sense for patients who have exhausted injection-based treatments and still have debilitating pain.
SI Joint Pain After Spinal Fusion Surgery
One population that often ends up searching for the right doctor is people who develop SI joint pain after lumbar or lumbosacral spinal fusion. This is a recognized and surprisingly common complication. Imaging studies show more frequent degeneration of the SI joint in patients who have had lumbar or lumbosacral fusion compared to patients without such surgery.18PubMed Central. Sacroiliac joint pain after lumbar/lumbosacral fusion: current knowledge Risk factors for developing post-fusion SI joint degeneration include having screws fixed into the sacrum, smoking, alcohol use, and older age.19Journal of Advanced Spine Surgery. Sacroiliac Joint Degeneration Following Lumbar Fusion: What are the Risk Factors?
The reason this happens is biomechanical: when vertebral segments are fused together, the joints above and below the fusion absorb more stress. The SI joint sits directly below the lumbosacral junction, so it often bears the brunt of this redistribution. If you had spine surgery and your low back pain either never fully resolved or returned in a different location, ask your spine surgeon or pain management doctor specifically about the SI joint. Many patients in this situation cycle through repeat MRIs of the lumbar spine without anyone checking the joint just below it.
Chiropractors and Other Manual Therapists
Chiropractors, osteopathic physicians who perform manipulation, and some massage therapists also treat SI joint dysfunction. As noted earlier, the evidence for manipulation in SI joint pain shows improvement in disability, though its effect on pain alone, separate from exercise, is less certain.9PubMed Central. Efficacy of manual therapy for sacroiliac joint pain syndrome: a systematic review and meta-analysis of randomized controlled trials Chiropractors and osteopaths can be a reasonable choice for people whose SI joint dysfunction is mild to moderate and primarily mechanical, especially when combined with a structured exercise program.
The limitation of seeing only a manual therapist is diagnostic. Chiropractors and massage therapists cannot order diagnostic injections, prescribe medications, or rule out inflammatory conditions. If you start with a chiropractor and do not see meaningful improvement within six to eight weeks, escalating to a physician who can perform diagnostic blocks is a reasonable next step.
Podiatric and Biomechanical Considerations
An underappreciated angle on SI joint pain involves what is happening at your feet. Gait asymmetry and abnormal foot mechanics can load the pelvis unevenly and contribute to SI joint stress. A small study found that gait training combined with shoe inserts significantly decreased SI joint pain, and that pain scores correlated strongly with both dynamic gait asymmetry and the ratio of forefoot to rearfoot pressure.20Journal of Physical Therapy Science. The effect of gait training with shoe inserts on the improvement of pain and gait in sacroiliac joint patients This does not mean you need to see a podiatrist as your primary SI joint doctor, but it does suggest that a biomechanical assessment of your gait and footwear may be a worthwhile addition to treatment, particularly if your SI joint pain is chronic and keeps returning after successful treatment.
Regenerative Medicine and PRP
Platelet-rich plasma injections have generated interest as a potential treatment for SI joint dysfunction. However, a systematic review with pooled analysis concluded that there is not enough evidence to support PRP injections over the current standard of care with corticosteroids. The authors called for further randomized controlled trials before PRP can be recommended as a go-to treatment.21PubMed. Efficacy of platelet-rich plasma for sacroiliac joint dysfunction: a qualitative systematic review with pooled analysis Some pain management and sports medicine clinics offer PRP for SI joint pain, but if you are considering it, know that you are likely paying out of pocket for a treatment that has not yet proven itself superior to a standard steroid injection.
How to Navigate the Referral Chain
Given the number of specialties involved, a practical question is how to avoid bouncing between doctors for months. Here is a general sequence that works for most people:
- Start with your primary care doctor or a physiatrist. Get a focused exam with the five provocative tests. If three or more are positive, you have a working diagnosis.
- Try physical therapy first. Six to twelve weeks of targeted exercise and, if appropriate, manual therapy resolve many cases without further intervention.
- Get a diagnostic injection if the picture is unclear. This confirms the SI joint as the pain source and is typically performed by an interventional pain specialist or a physiatrist with procedural training.
- Consider radiofrequency ablation for persistent pain. An interventional pain specialist performs this after a positive diagnostic block.
- Request a rheumatology referral if inflammatory features are present. Young age at onset, prolonged morning stiffness, improvement with activity, a family history of autoimmune disease, or psoriasis all warrant evaluation for spondyloarthropathy.
- Discuss surgery only after conservative and interventional options have been exhausted. An orthopedic spine surgeon or neurosurgeon experienced in SI joint fusion can evaluate candidacy.
One piece of advice that does not always make it into clinical guidelines: if you are seeing a provider who only offers one type of treatment and insists that their treatment is all you need, get a second opinion. SI joint pain responds to different approaches in different people, and the best outcomes come from providers who can connect you with colleagues across specialties when needed.1Regional Anesthesia & Pain Medicine. Consensus practice guidelines on sacroiliac joint complex pain from a multispecialty, international working group