Background: Hallux rigidus (stiff great toe) commonly arises from degenerative joint disease and causes pain, swelling, osteophyte formation, and limited motion; surgery is indicated when conservative measures fail. Cheilectomy (removal of dorsal osteophytes and resection to restore range of motion) is used for early/mild disease and can be combined with osteotomy; advanced or moderate-to-severe disease may require arthrodesis or implant arthroplasty.
Indications and rationale: Cheilectomy without implant is proven and medically necessary for mild to moderate hallux limitus/rigidus when radiographic imaging (e.g., Coughlin and Shurnas or Hattrup and Johnson grading) confirms severity and persistent pain follows a reasonable trial of conservative therapy (orthotics/shoe modification, NSAIDs or injections, activity modification, and debridement of hyperkeratotic lesions if present). Cheilectomy without implant is not medically necessary for severe hallux rigidus due to insufficient evidence. Cheilectomy with implant (specified as Hemi-Implant or Total Implant Arthroplasty) is proven and medically necessary for moderate to severe hallux rigidus when similar imaging and conservative-treatment criteria are met.
Evidence summary and guidance: Systematic reviews and meta-analyses have compared arthrodesis, metallic hemiarthroplasty, and implant arthroplasty with mixed results—arthrodesis may provide greater pain reduction while implant arthroplasty preserves motion; overall evidence is limited by study quality and follow-up. Multiple reviews note insufficient high-quality RCTs to definitively rank procedures, and severity grading using Hattrup & Johnson or Coughlin & Shurnas is commonly used to classify mild, moderate, or severe disease.
Osteochondral grafting: Osteochondral allograft or autograft transplantation for cartilage defects of the foot is considered unproven and not medically necessary because evidence is limited to small case series with heterogeneous techniques and outcomes; larger comparative studies with longer follow-up are needed.
Policy implementation notes: For detailed medical necessity determinations for listed procedures (arthrodesis/arthroplasty, exostectomy/bunionectomy, various osteotomies, and plantar fascial release), the policy references InterQual CP: Procedures criteria. In addition, NICE guidance (IPG727, 2022) on synthetic cartilage implants recommends limited or research-context use with governance, audit, and reporting requirements.