Carelon Total Knee Arthroplasty prior authorization requirements (2026)
What Carelon generally requires to approve Total Knee Arthroplasty (CPT 27447), for Commercial plans. Yes. Carelon generally requires prior authorization for Total Knee Arthroplasty (CPT 27447).
Medical-necessity criteria Carelon generally applies
Patient must meet ALL: (1) Severe knee OA confirmed by weight-bearing X-rays with significant joint space narrowing (Kellgren-Lawrence Grade 3 or 4) or other disabling knee pathology (AVN, post-traumatic arthritis); (2) Conservative care failure documented over ≥3 months: supervised PT (≥6 sessions with exercise log), NSAIDs or analgesics with documented response, AND corticosteroid or viscosupplement injection with inadequate relief; (3) Objective functional impairment: KOOS Pain subscale <40, WOMAC total score >50, or VAS pain ≥7/10 at multiple visits; (4) BMI ≤ 40; if BMI 40–50, documentation of medical clearance and anesthesia consultation; BMI >50 typically requires weight loss program completion; (5) Active lifestyle goal documented — patient-stated functional goals for post-operative recovery
Diagnoses that commonly support medical necessity
ICD-10-CM diagnoses frequently associated with medical necessity for Total Knee Arthroplasty. Confirm the covered diagnosis list against the current Carelon policy.
Commonly required documentation
- Weight-bearing AP, lateral, and sunrise knee X-rays with measurement of joint space
- PT records showing supervised sessions with specific exercise documentation
- pain and functional scores (KOOS or WOMAC) from multiple visits
- documentation of injection(s) with date(s) and response
- BMI and comorbidity documentation
- patient-stated goals for surgery
- surgeon evaluation with operative plan
How to submit
- Portal: Carelon Provider Portal
- Typical turnaround: about 3 days
Source
Carelon requires KOOS or WOMAC scores — generic pain complaints without validated scores are common denial reasons. Conservative care must be supervised PT, not home exercise alone. Injection documentation must include date, agent, and patient-reported response. Peer-to-peer available within 3 business days.
Frequently asked questions
Does Carelon require prior authorization for Total Knee Arthroplasty?
Yes. Carelon generally requires prior authorization for Total Knee Arthroplasty (CPT 27447).
What does Carelon require to approve Total Knee Arthroplasty?
Patient must meet ALL: (1) Severe knee OA confirmed by weight-bearing X-rays with significant joint space narrowing (Kellgren-Lawrence Grade 3 or 4) or other disabling knee pathology (AVN, post-traumatic arthritis); (2) Conservative care failure documented over ≥3 months: supervised PT (≥6 sessions with exercise log), NSAIDs or analgesics with documented response, AND corticosteroid or viscosupple… Always confirm against the current Carelon policy.
How long does a Carelon prior authorization take?
Carelon typically decides Total Knee Arthroplasty requests in about 3 days. Timeframes vary; check the payer portal.
Submitting Total Knee Arthroplasty to Carelon?
Praxigen checks your clinical note against these criteria before you submit and drafts a policy-cited appeal if it is denied. You review and submit; nothing is sent automatically.