Listing 1.17 Reconstructive Surgery or Surgical Arthrodesis of a Major Weight-Bearing Joint in 2026: How SSA Decides SSDI Claims Under Paragraph A History of Surgery, Paragraph B 12-Month Limitation, and Paragraph C Documented Medical Need for a Walker or Bilateral Assistive Device

By Anthony Albert, Benefits Research Director, Disability Exchange · Updated July 1, 2026 · SSA Blue Book Section 1.00 Musculoskeletal (Adult)

Listing 1.17 is the SSA rule for people who have had reconstructive surgery or a surgical fusion of a hip, knee, or ankle and cannot recover well enough to work. It is one of the newer listings in the 2021 musculoskeletal revision. It replaced the old 1.03 that used to control this territory. The 1.17 test is tight. You have to prove the surgery happened, prove the limitation has lasted or will last at least 12 months, and prove you require a walker or two canes or two crutches to get around.

This guide walks all three paragraphs of 1.17 with the verbatim text, defines the major weight-bearing joints (hip, knee, ankle only), explains why a shoulder arthroplasty does not qualify, walks the 2026 orthopedic reality of failed total hip arthroplasty (THA) and total knee arthroplasty (TKA), infected prostheses that require staged revision, and how the 12-month duration rule under 20 CFR 404.1509 interacts with the 1.00C6a documented medical need framework. Two worked Massachusetts and Florida cases close the file.

If you had a joint replacement or fusion and you are struggling to walk more than a year later, you may meet 1.17. See If You Qualify.

What 1.17 Actually Says

Here is the verbatim text of Listing 1.17 from the SSA Blue Book Section 1.00 Musculoskeletal (Adult), revised effective April 2, 2021:

This is a strict three-part AND test. All three paragraphs have to be in the record. Paragraph A is the surgery. Paragraph B is the duration. Paragraph C is the assistive device.

What Counts as a Major Weight-Bearing Joint

Section 1.00S defines the major weight-bearing joints as the hip, the knee, and the ankle. Only these three. A shoulder arthroplasty, wrist arthrodesis, or elbow reconstruction does not qualify under 1.17 because those are upper extremity joints and are covered under 1.18 with different device requirements. A cervical or lumbar spinal fusion is not a major weight-bearing joint under 1.17. Those are filed under 1.15 or 1.16.

Reconstructive surgery under 1.00S includes:

• Total hip arthroplasty (THA). Cemented or cementless. Includes revision arthroplasty.
• Total knee arthroplasty (TKA). Cemented, cementless, or hybrid. Includes revision TKA and unicompartmental knee arthroplasty (UKA).
• Total ankle arthroplasty (TAA). A less common but growing procedure. Third-generation implants (INBONE, INFINITY, VANTAGE).
• Hip resurfacing. Birmingham Hip Resurfacing (BHR) and similar.
• Femoral or tibial osteotomy for realignment. High tibial osteotomy (HTO), distal femoral osteotomy (DFO), periacetabular osteotomy (PAO).

Surgical arthrodesis under 1.00S is a surgical fusion of a joint. Common examples include ankle arthrodesis (tibiotalar fusion), subtalar fusion, tibiotalocalcaneal (TTC) fusion, and knee arthrodesis (a rare salvage procedure, usually after infected TKA that cannot be revised). Hip arthrodesis is rare in modern practice.

Paragraph A: History of Reconstructive Surgery or Surgical Arthrodesis

Paragraph A is the easiest paragraph to prove. It requires documentation that the surgery happened. An operative report, a discharge summary, or a treating orthopedic note referencing the procedure date and technique satisfies Paragraph A.

The most helpful documents:

• The operative report from the surgeon with procedure date, joint operated on, implant type or arthrodesis technique, and any complications.
• The hospital discharge summary with the ICD-10 procedure codes.
• Post-operative radiographs showing the implant or fusion hardware in position.
• The treating orthopedic notes at 6 weeks, 3 months, 6 months, and annually after surgery.

SSA does not require the surgery to have been recent. A THA from 2018 that has since loosened and requires revision counts. A TKA from 2020 that developed a periprosthetic infection counts. What matters is that the surgery is in the medical record and that Paragraph B and C limitations exist now.

Paragraph B: 12-Month Duration of Physical Limitation

Paragraph B invokes the 20 CFR 404.1509 duration rule. The impairment-related physical limitation has to have lasted at least 12 months or be expected to last at least 12 months. Most well-recovered joint replacements do not satisfy 1.17 because normal recovery from primary TKA or THA takes 3 to 6 months to good function, and by 12 months post-op most patients are back to walking without assistance or with a single cane at most.

The 1.17 candidates are the surgeries that did not go well. The categories that anchor a strong Paragraph B are:

• Periprosthetic joint infection (PJI). Estimated at 1 to 2 percent of primary TKA, 1 to 2 percent of primary THA, and up to 4 percent of revisions. Requires prolonged IV antibiotics, often two-stage revision with an antibiotic-loaded cement spacer for 6 to 12 weeks, then reimplantation. Recovery often stretches to 12 to 24 months.
• Prosthetic loosening. Aseptic loosening of the femoral or tibial component, or acetabular cup loosening. Requires revision arthroplasty. Revision revision revision (Rev3) THAs have poor functional outcomes.
• Peri-prosthetic fracture. Vancouver B2 or B3 fractures around a hip stem, or Rorabeck Type II or III around a TKA. Requires revision with a longer stem or plating. Recovery is prolonged.
• Persistent stiffness. Post-TKA stiffness with active flexion less than 90 degrees is a functional problem. Manipulation under anesthesia (MUA), open lysis of adhesions, or revision may be attempted with variable results.
• Failed hip resurfacing (metal-on-metal complications). Adverse reactions to metal debris (ARMD) can require revision. Some patients have persistent soft tissue damage and functional limitations after revision.
• Failed ankle arthroplasty. Aseptic loosening, subsidence, or subtalar arthritis progression. Revision to arthrodesis is often the salvage. Prolonged non-weight-bearing recovery.
• Failed ankle arthrodesis. Non-union of a tibiotalar fusion, adjacent joint arthritis (subtalar or Chopart), or below-knee amputation as end salvage.

The treating orthopedist should document in the medical record that the physical limitation has already lasted at least 12 months or is expected to. A specific statement like "This patient will not achieve independent ambulation without a walker for at least 12 more months given the current stage of two-stage revision" is strong Paragraph B language.

Paragraph C: Documented Medical Need for a Walker, Bilateral Canes, or Bilateral Crutches

Paragraph C is the same 1.00C6a and 1.00C6d(i) framework used in Listings 1.15, 1.16, 1.18, 1.20, and 1.22. The claimant has to require a walker, bilateral canes, or bilateral crutches. A single cane does not satisfy it. A single AFO or knee brace does not satisfy it. The requirement is bilateral upper extremity support.

1.00C6a Documented Medical Need

Documented medical need means evidence from a medical source supporting medical need for an assistive device for a continuous period of at least 12 months. The record has to describe the circumstances under which the device is needed. A single prescription is not enough. The strongest files include PT gait evaluations, orthopedic follow-up notes, OT home assessments, and DME (durable medical equipment) prescriptions across multiple months.

1.00C6d(i) Bilateral Device

The device can be a standard walker, a four-wheeled rollator, a hemi-walker, bilateral canes (used together, not alternating with a single cane), or bilateral crutches (axillary or forearm). A platform walker is also acceptable and is common in patients with concurrent wrist or hand limitations.

1.00C6d(ii)(A) Both-Hands Wheelchair

A manual wheelchair propelled with both hands also satisfies Paragraph C. Power wheelchairs and scooters do not because they do not require both hands. This alternate path is common in failed TKA or failed THA patients who cannot bear weight due to infection, hardware failure, or dislocation risk.

Two-Stage Revision for Periprosthetic Joint Infection

The 2026 gold standard for chronic PJI is a two-stage revision. Understanding this workflow is important because SSA decisions often turn on where the claimant is in the treatment arc.

1. Stage 1 (explantation and spacer). The infected prosthesis is removed. All infected soft tissue and bone is debrided. An antibiotic-loaded cement spacer is placed in the joint. The patient is on IV antibiotics for 6 to 12 weeks (vancomycin, cefepime, daptomycin, ertapenem, or a combination based on cultures). During spacer phase, weight-bearing is limited or non-existent. Most spacer patients use a walker or manual wheelchair.
2. Stage 2 (reimplantation). After the infection markers (ESR, CRP, synovial fluid analysis) normalize, the spacer is removed and a definitive revision prosthesis is implanted. The patient starts another rehab arc.

Two-stage revision for TKA achieves infection eradication in 70 to 85 percent of cases. For THA the numbers are 80 to 90 percent. That means 10 to 30 percent fail the first attempt and require redo procedures. A patient in the middle of a failed two-stage revision easily meets 1.17.

Failed TKA and TKA Stiffness

Primary TKA is one of the most common orthopedic operations in the United States. About 800,000 primary TKAs are performed each year. Roughly 20 to 30 percent of TKA patients report dissatisfaction with the outcome, and a smaller fraction have measurable functional limitations that persist beyond 12 months.

Common TKA problems that anchor 1.17:

• Persistent stiffness with flexion below 90 degrees. The 90-degree threshold is functional. Below it, sitting, driving, and stair climbing become difficult. MUA can help but often does not restore full range.
• Extensor mechanism dysfunction. Patellar tendon rupture, quadriceps rupture, or patellar clunk. These often require surgical repair with variable success.
• Instability. Coronal plane laxity or flexion-extension gap imbalance. Revision with more constrained implant (varus-valgus constrained or hinged) may be needed.
• Malalignment. Component malposition can cause pain and accelerated wear. Revision required.
• Aseptic loosening. Progressive radiolucency at cement-bone or cement-implant interface. Revision required.

Failed THA and Prosthetic Dislocation

Primary THA has excellent long-term outcomes overall, but the failures are dramatic. About 400,000 primary THAs are performed in the United States each year. Failures include:

• Recurrent dislocation. Rate about 1 to 5 percent after primary THA. Higher after revision. Recurrent dislocators often require revision with a larger head, dual mobility cup, or constrained liner.
• Aseptic loosening. Especially with older cemented stems or first-generation cementless cups.
• Osteolysis. Polyethylene wear debris causes bone loss around the implant. Newer highly cross-linked polyethylene has reduced this substantially, but older implants still fail.
• Vancouver periprosthetic fracture. Especially Vancouver B2 and B3 involving the stem. Revision required.
• Metal-on-metal complications. Some hip resurfacing patients have adverse reactions to metal debris with pseudotumor formation.

Ankle Arthrodesis and Ankle Arthroplasty in 2026

Ankle arthrodesis is a fusion of the tibiotalar joint. It eliminates ankle pain but eliminates ankle motion. Patients ambulate with a stiff-ankle gait and often develop adjacent joint arthritis at the subtalar or midfoot joints over 10 to 20 years. Common problems that anchor 1.17:

• Non-union of the fusion. Reported rates 5 to 15 percent depending on technique and comorbidities.
• Adjacent joint arthritis. Subtalar or Chopart arthritis progression after long-standing tibiotalar fusion.
• Hardware pain. Some patients need hardware removal.
• Malunion. Varus or valgus deformity at the fusion site.

Total ankle arthroplasty (TAA) is an increasingly popular alternative to arthrodesis. Third-generation implants (INBONE II, INFINITY, VANTAGE, CADENCE, SALTO Talaris) have improved survival rates. But TAA still fails at 10 to 15 percent at 10 years. Failed TAA revised to arthrodesis is a difficult salvage and often produces a limb that requires bilateral assistive device use indefinitely.

How DDS Reads a 1.17 File

DDS examiners look for three specific documents:

1. The operative report or discharge summary establishing Paragraph A.
2. The treating orthopedic notes across 12 months establishing Paragraph B duration.
3. The DME prescription plus PT gait evaluation plus orthopedic note establishing Paragraph C bilateral device.

When all three are in the file, the claim is usually allowed at the initial or reconsideration level. When Paragraph C is missing (the patient uses only a single cane), the claim gets routed to Step 5 RFC. SSR 96-9p then controls the sedentary erosion. A claimant with a stiff or painful knee, hip, or ankle who requires a hand-held device for balance has significantly eroded sedentary base. Grid Rules at 201.06, 201.10, and 201.14 often direct disabled findings for claimants 55 and older, and sometimes 50 to 54.

For upper extremity joint problems see our deep dive on Listing 1.18 abnormality of a major joint. For non-healing fractures see Listing 1.22 non-healing or complex fracture.

Worked Example: Robert, 61, Springfield, Massachusetts

Robert was a 61-year-old warehouse supervisor in Springfield, Massachusetts. He had a right primary TKA in April 2024 after 15 years of progressive osteoarthritis pain. His post-op course was going well until week 8 when he developed increasing swelling, drainage from the incision, and a fever of 101.8. Aspiration confirmed periprosthetic joint infection with methicillin-sensitive Staphylococcus aureus.

Robert underwent Stage 1 explantation with antibiotic-loaded cement spacer placement in July 2024. He was on IV cefazolin for 6 weeks through a PICC line, then oral suppressive antibiotics. Weight-bearing was toe-touch only on the right leg. He used a walker at home and a manual wheelchair for community mobility.

ESR and CRP normalized by October 2024. Reimplantation (Stage 2) was performed in November 2024 with a varus-valgus constrained TKA. Post-Stage 2 recovery was slow. At 6 months post-reimplant (May 2025), Robert had persistent right knee stiffness with active flexion to 82 degrees despite aggressive PT. He underwent MUA in July 2025 with modest improvement to 92 degrees.

By March 2026 Robert still could not walk more than 20 feet without a rollator due to right knee weakness and instability. Two PT discharges and three orthopedic follow-up notes across 2024 and 2025 documented continuous walker or rollator use since July 2024, a period of about 21 months at hearing. His orthopedic surgeon signed an HA-1152 that read: "History of right TKA followed by explantation for infection, two-stage revision to constrained TKA, persistent stiffness and instability requiring a walker or rollator continuously since July 2024 with no expectation of return to independent ambulation without assistive device for at least 12 more months."

The ALJ found Listing 1.17 met at the hearing in April 2026. The decision quoted all three paragraphs verbatim and referenced 1.00C6a and 1.00C6d(i). Onset was set at April 2024 (the date of the primary TKA that triggered the disability chain). Back pay covered 24 months.

Worked Example: Carmen, 58, Miami, Florida

Carmen was a 58-year-old housekeeping supervisor in Miami. She had bilateral tibiotalar arthrodesis for post-traumatic ankle arthritis (a 2005 fall from a ladder that damaged both talar domes). The left ankle was fused in 2018 with good result. The right ankle was fused in 2022.

The right ankle developed a non-union that was diagnosed on CT in June 2023. Carmen underwent revision arthrodesis with iliac crest autograft in September 2023. At 6 months post-revision, CT still showed incomplete fusion at the tibiotalar joint. A second revision with a retrograde tibiotalocalcaneal (TTC) intramedullary nail was performed in March 2024.

By March 2025 the TTC fusion appeared solid on CT but Carmen had developed severe adjacent midfoot and subtalar arthritis on the right. She was ambulating with bilateral forearm crutches and using a manual wheelchair for grocery shopping and any distance over 100 feet. Continuous crutch use was documented in PT notes at Baptist Health Miami across 2023 through 2026.

Carmen filed for SSDI in April 2025. The initial denial cited that her fusion had achieved union. Reconsideration reversed after her orthopedic surgeon signed an HA-1152 that read: "History of bilateral tibiotalar arthrodesis with right revision to TTC nail. Persistent bilateral ankle stiffness and adjacent joint arthritis requiring bilateral forearm crutches and both-hands wheelchair use continuously since 2022, with the limitation expected to last for the remainder of her life."

The reconsideration decision cited Listing 1.17 Paragraphs A, B, and C met. The examiner noted that both bilateral forearm crutches (1.00C6d(i)) and both-hands wheelchair use (1.00C6d(ii)(A)) satisfied Paragraph C. Onset was set at the date Carmen last worked, February 2024. Back pay covered 14 months.

See related state pages: Massachusetts, Florida, Texas, California, New York, Pennsylvania, Ohio.

What to Get on the Medical Source Statement

The HA-1152 medical source statement should include:

• The joint operated on (right hip, left knee, right ankle, etc).
• The date of the original surgery and the technique (TKA, THA, TAA, tibiotalar arthrodesis, TTC arthrodesis).
• All subsequent surgeries in chronological order (revision, explantation and spacer, reimplantation, MUA, etc).
• The current functional status: gait pattern, ability to bear weight, range of motion, stability.
• The assistive device the patient requires (walker, rollator, hemi-walker, bilateral canes, bilateral crutches, or both-hands wheelchair) and the circumstances of use.
• A statement that the limitation has lasted at least 12 months or is expected to.
• Whether the patient is a candidate for further surgery and, if so, the expected timeline and recovery.

Step 5 RFC Fallback

If the imaging or surgical record supports 1.17 Paragraph A but the patient uses only a single cane, the file falls to Step 5. SSR 96-9p tells the ALJ that the occupational base for sedentary work is significantly eroded when a hand-held device is required for balance or ambulation. Additional erosion factors include:

• Need for a sit-stand option due to joint stiffness or pain with prolonged sitting.
• Need to raise the leg during the workday to control swelling.
• Need for unscheduled breaks to change position.
• Inability to tolerate cold, damp, or vibratory environments due to prosthetic pain.
• Inability to bend, stoop, kneel, or crouch due to joint stiffness.

SSR 83-10 and SSR 83-14 support finding disabled at Grid Rules 201.06 (advanced age, limited education), 201.10 (advanced age, high school no direct entry), and 201.14 (closely approaching advanced age, limited education, no transferable skills). A skilled vocational expert will often testify that the residual occupational base is eroded to fewer than 200 jobs nationally when all the joint limitations are included.

Frequently Asked Questions

If you had a hip, knee, or ankle surgery and you cannot walk without a walker or two crutches more than a year later, you should file. See If You Qualify.