Your first stop for sacroiliac joint pain is usually your primary care doctor, who can evaluate whether the SI joint is actually the source of your pain and start initial treatment. From there, the right specialist depends on what’s causing your pain and how long you’ve had it. Between 10 and 25% of all chronic low back pain originates from the SI joint, so the providers who treat it span a wide range of disciplines.
Start With Your Primary Care Doctor
A primary care physician is the best first point of contact because SI joint pain overlaps with so many other conditions. Pain in the lower back, buttock, or hip can come from a herniated disc, hip arthritis, sciatica, or the SI joint itself, and telling them apart requires a thorough history and physical exam of the spine, pelvis, and hips. Your doctor will also screen for red flags like unexplained weight loss, fever, bowel or bladder changes, and night pain that could signal something more serious.
If SI joint dysfunction is the likely culprit, the standard first-line approach is an anti-inflammatory medication for up to two weeks along with a referral to physical therapy. Many people improve with this combination alone. If you don’t, your primary care doctor will refer you to the appropriate specialist based on your symptoms and how your body responds to treatment.
Physical Therapist
Physical therapists are often the first specialist you’ll work with, and for many people they’re the most important one. A PT trained in pelvic and spinal conditions can perform a set of five hands-on provocative tests (including the FABER test, compression test, thigh thrust, distraction, and Gaenslen test) to help confirm SI joint dysfunction. The clinical standard is that at least three of these five tests need to be positive, with either the thigh thrust or compression test among them.
Treatment focuses on correcting the biomechanical problems that created the pain in the first place. That means exercises targeting muscle imbalances around the pelvis, core stability work, and manual techniques like joint mobilization and muscle energy techniques. Your therapist may also recommend an SI belt, which compresses the pelvis to stabilize the joint during daily activities. This rehabilitative approach is the foundation of SI joint treatment at every stage, and most specialists will want you to complete a full course of physical therapy before considering anything more invasive.
Physiatrist (PM&R Doctor)
A physiatrist, or physical medicine and rehabilitation (PM&R) doctor, specializes in musculoskeletal pain without surgery. They’re particularly well-suited for SI joint pain because they can manage both the diagnostic workup and a range of non-surgical treatments. Physiatrists coordinate care that includes therapeutic exercise, manual medicine, bracing, and orthotics, while also being able to order imaging and perform or refer for injections.
If your primary care doctor doesn’t have a strong sense of what’s driving your pain, a physiatrist is often the most efficient next step. They’re trained to look at how your whole body moves and identify functional deficits contributing to your symptoms.
Rheumatologist
Not all SI joint pain is mechanical. If your pain comes with pronounced morning stiffness lasting 30 minutes or more, improves with movement but worsens with rest, or started gradually before age 45, you may have an inflammatory condition called axial spondyloarthritis. This is a form of inflammatory arthritis that primarily affects the spine and SI joints.
Other signs that point toward a rheumatologist include fatigue that comes and goes, pain and swelling in tendons (especially the Achilles), and painful, light-sensitive eye inflammation. These symptoms together suggest the immune system is driving the joint inflammation rather than a structural or mechanical problem. A rheumatologist can run blood tests and order specialized imaging to confirm the diagnosis and start targeted anti-inflammatory treatment that a general practitioner typically wouldn’t prescribe.
Interventional Pain Specialist
When conservative treatment with physical therapy and medication hasn’t provided enough relief, a pain management specialist is the next level. These doctors perform the procedures that both confirm the diagnosis and treat the pain directly.
The most important tool they offer is the diagnostic SI joint block. There is no true gold standard test for SI joint pain on imaging alone, so a guided injection of local anesthetic directly into the joint is the most reliable way to confirm it’s the actual pain source. The procedure is done under fluoroscopy (real-time X-ray) to ensure precise needle placement. If a single injection reduces your pain by 75% or more, the test is considered positive. Some doctors use a two-injection protocol with different anesthetics for even greater accuracy.
Once the SI joint is confirmed as the pain generator, pain specialists can offer several therapeutic options. A steroid injection into the joint delivers anti-inflammatory medication directly to the source, and research supports it as a treatment with benefits that outweigh the risks. If steroid injections provide temporary relief but the pain returns, radiofrequency ablation uses heat to disrupt the nerve signals carrying pain from the joint. This targets the small nerve branches along the sacrum that supply the SI joint. Prolotherapy, which involves injecting a sugar solution or platelet-rich plasma to stimulate tissue repair, is another option. Recent studies have found that platelet-rich plasma injections into the SI joint reduced pain more than steroid injections alone.
Orthopedic Surgeon or Spine Surgeon
Surgery is reserved for people who have tried conservative treatments, confirmed the SI joint as the pain source through diagnostic injections, and still have uncontrolled pain. The standard procedure today is minimally invasive SI joint fusion, which stabilizes the joint using small titanium implants placed through a small incision.
The criteria for surgical candidacy are specific: you typically need at least three of five positive physical exam tests, confirmation through diagnostic blocks, and evidence that the hip and lumbar spine have been ruled out as pain generators. Meeting all three criteria gives the procedure a success rate above 80%. In a recent multicenter study, 82% of patients who underwent minimally invasive fusion achieved a clinically meaningful reduction in pain at 12 months. Among patients who started with more severe symptoms, that number rose to nearly 89%. No device-related serious complications were reported.
An orthopedic surgeon specializing in the spine or pelvis, or a neurosurgeon with spine training, performs this procedure. Most will want documentation of at least six months of failed conservative care before considering you a candidate.
Chiropractor or Osteopathic Physician
Chiropractors and osteopathic physicians (DOs) trained in manipulative therapy offer manual treatments that can help with SI joint dysfunction, particularly when the joint is “stuck” or misaligned. Techniques include high-velocity adjustments and gentler mobilization approaches. The American Academy of Family Physicians specifically lists osteopathic manipulative therapy as an appropriate early intervention alongside physical therapy.
These providers work best as part of a broader treatment plan rather than a standalone solution. If your pain responds well to manipulation but keeps returning, that’s a signal to pursue additional evaluation with one of the specialists above to address the underlying cause.
How to Choose the Right Provider
The path you take depends largely on your symptoms and how long you’ve had them. For pain that started recently after a clear trigger like pregnancy, a fall, or a change in activity, starting with your primary care doctor and a physical therapist is the most reasonable approach. For pain that’s been lingering for months and hasn’t responded to basic treatment, a physiatrist or pain specialist can offer more targeted options. For pain that comes with systemic symptoms like morning stiffness, fatigue, or eye problems, a rheumatologist should be high on your list.
If you want to skip ahead to a specialist, a physiatrist is generally the most versatile choice. They can evaluate the problem, coordinate non-surgical care, and refer you to a pain specialist or surgeon if needed, all without committing you to a single treatment path.