TL;DR: Aetna, a CVS Health company, modified CPB 0398 covering idiopathic scoliosis, effective January 17, 2026. Here's what billing teams need to know about surgical thresholds, brace coverage, growing rod systems, and which codes are now explicitly excluded.
This update to the Aetna idiopathic scoliosis coverage policy clarifies medical necessity thresholds for spinal fusion, growing rods, and orthotic bracing. It also draws hard lines around experimental devices and non-covered procedures — including vertebral body tethering codes 0656T, 0657T, and 0790T, plus the full suite of chiropractic and osteopathic manipulation codes. If your practice bills spinal surgery, scoliosis bracing, or growing rod procedures for Aetna members, this policy update directly affects your reimbursement and prior authorization workflows.
Quick-Reference: Aetna CPB 0398 Idiopathic Scoliosis Policy Update (2026)
| Field | Detail |
|---|---|
| Payer | Aetna, a CVS Health company |
| Policy | Idiopathic Scoliosis — CPB 0398 |
| Policy Code | CPB 0398 |
| Change Type | Modified |
| Effective Date | January 17, 2026 |
| Impact Level | High |
| Specialties Affected | Orthopedic Surgery, Pediatric Spine Surgery, Physical Medicine & Rehabilitation, Orthotics & Prosthetics, DME Suppliers |
| Key Action | Audit charge capture for tethering codes 0656T, 0657T, and 0790T — these are now explicitly non-covered. Confirm growing rod cases use MAGEC System or Shilla technique before billing. |
Aetna Idiopathic Scoliosis Coverage Criteria and Medical Necessity Requirements 2026
The core surgical coverage thresholds in CPB 0398 are age-dependent and curve-specific. Get these wrong and you're looking at a claim denial on a high-dollar spinal fusion case.
For adolescents under 18, Aetna considers spinal fusion with instrumentation and bone grafting medically necessary when the curve measures 40 degrees or greater. For young adults age 18 to 25, that threshold rises to 50 degrees or greater. These are hard cutoffs — document the Cobb angle clearly in the medical record, and make sure it's on the claim.
Pre-operative inpatient cranial skeletal traction — billed with CPT 20661 or 20664 for halo application — is covered as an adjunct to surgery when the fusion criteria above are met. Aetna considers seven inpatient days medically necessary initially. Additional days require case-by-case review with documentation. If you're billing extended traction stays without that documentation, expect denials.
Growing Rods: What Aetna Covers and What It Doesn't
The growing rods coverage distinction is one of the most financially significant parts of this policy. Aetna covers the MAGEC System and the Shilla growth guidance technique as medically necessary for patients who meet surgical criteria. The Shilla technique has no specific CPT code — your billing team will need to use the relevant spinal fusion and instrumentation codes (CPT 22840–22844 for posterior non-segmental instrumentation, plus applicable arthrodesis codes from the 22548–22594 range).
The Phenix Growing Rod device is explicitly excluded as experimental, investigational, and unproven. Other expandable magnetic growing rods not specifically named in the policy face the same designation. If your surgeons are using a device that isn't the MAGEC System or Shilla, confirm its status with your Aetna rep before the case — not after.
Brace and Cast Coverage: The Provider Credentialing Trap
Aetna covers nine named brace types as durable medical equipment for scoliosis treatment. The coverage policy includes the Boston, Charleston, Milwaukee, Peak Scoliosis Bracing System, Providence, Rigo-Cheneau, and Standard TLSO braces, plus the Risser jacket and TechnoSpine TLSO-Scoliosis Brace.
But the coverage criteria for orthotic DME are strict on provider credentialing. The orthotist must be certified by ABC or BOC, or licensed by the state where services are provided. Services must also fall within the provider's licensed scope of practice. A claim from an uncertified provider — even for a covered brace — will not pass medical necessity review. Audit your O&P billing for provider credential documentation before January 17, 2026.
Prior Authorization for High-Dollar Procedures
Prior authorization requirements for spinal fusion and growing rod procedures vary by plan and are not addressed in CPB 0398. Confirm PA requirements directly with Aetna for each specific plan before scheduling. A clean PA built on the curve degree and age criteria in CPB 0398 is your best defense against a downstream denial.
Aetna Idiopathic Scoliosis Exclusions and Non-Covered Indications
Aetna draws three clear exclusion categories in CPB 0398. Each one has direct billing consequences.
Vertebral Body Tethering is the highest-exposure exclusion. CPT codes 0656T (anterior vertebral body tethering, up to seven segments), 0657T (eight or more segments), and 0790T (revision, replacement, or removal) are explicitly non-covered for the indications in this policy. Do not bill these for Aetna members expecting reimbursement.
CPT codes 22836, 22837, and 22838 for thoracic vertebral body tethering are listed in CPB 0398 as codes related to the policy. The policy data extract reviewed does not provide a clear covered or non-covered designation for these codes based on the available data. Confirm the coverage status of 22836, 22837, and 22838 directly from the full CPB 0398 policy text or with your Aetna provider relations contact before billing.
Chiropractic and Osteopathic Manipulation for adult scoliosis is not covered. CMT codes 98940, 98941, 98942, and 98943 are excluded for adult scoliosis. OMT codes 98925 through 98929 are similarly non-covered. If your practice bills manipulation as a conservative measure before surgery, these exclusions apply to adult patients. Pediatric coverage may differ — but for the adult population, don't bill manipulation expecting payment.
Spinal Manipulation Under Anesthesia using CPT 22505 is not covered for adult scoliosis under this policy.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Spinal fusion, adolescent (<18), curve ≥40° | Covered | 22548–22594, 22840–22844, bone graft add-ons | Document Cobb angle; confirm PA requirements directly with Aetna |
| Spinal fusion, young adult (18–25), curve ≥50° | Covered | 22548–22594, 22840–22844, bone graft add-ons | Same documentation requirements; confirm PA with Aetna |
| MAGEC System growing rods | Covered | Spinal fusion + instrumentation codes | Patient must meet surgical criteria above |
| Shilla growth guidance technique | Covered | No specific CPT; use fusion + instrumentation codes | Bill with relevant arthrodesis and instrumentation codes |
| Pre-operative halo-gravity traction | Covered | 20661, 20664 | 7 inpatient days initially; additional days case-by-case |
| Scoliosis braces (Boston, Charleston, Milwaukee, TLSO, etc.) | Covered (DME) | HCPCS codes for scoliosis bracing are included in CPB 0398 but were not available in the policy data extract reviewed — confirm specific codes with Aetna or your DME billing team | Orthotist must be ABC/BOC certified or state licensed |
| Bone graft add-ons for spine surgery | Covered | +20930, +20931, +20936, +20937, +20938 | Add-on codes; bill with primary fusion code |
| Spinal osteotomy (thoracic or lumbar) | Covered (when criteria met) | 22212, 22214, +22216 | As part of fusion procedure |
| Bone age studies | Covered (supporting) | 77072 | Used to establish skeletal maturity documentation |
| Sacroiliac joint arthrodesis | Listed in policy; coverage status requires verification | 27280 | Confirm coverage with Aetna before billing for idiopathic scoliosis indications |
| Vertebral body tethering (anterior) | Not Covered / Experimental | 0656T, 0657T, 0790T | Explicitly excluded |
| Thoracic vertebral body tethering | Verify with Aetna | 22836, 22837, 22838 | Listed in CPB 0398; confirm non-covered status directly from full policy text before billing |
| Phenix Growing Rod and other non-named expandable rods | Not Covered / Experimental | No specific code | Explicitly called out as investigational |
| Chiropractic manipulation, adult scoliosis | Not Covered | 98940, 98941, 98942, 98943 | Explicitly excluded for adult scoliosis |
| Osteopathic manipulation (OMT) | Not Covered | 98925–98929 | Not covered for indications in this CPB |
| Spinal manipulation under anesthesia, adult | Not Covered | 22505 | Excluded for adult scoliosis |
Aetna Idiopathic Scoliosis Billing Guidelines and Action Items 2026
These are the steps your billing team needs to take before January 17, 2026.
| # | Action Item |
|---|---|
| 1 | Remove 0656T, 0657T, and 0790T from your charge capture for Aetna patients. These vertebral body tethering codes are explicitly non-covered. If your surgeons perform tethering procedures, collect financial responsibility agreements from patients before scheduling. Do this before the effective date. |
| 2 | Audit all pending and recently submitted claims for 22836, 22837, and 22838. These thoracic vertebral body tethering codes are listed in CPB 0398, but the policy data extract reviewed does not provide a definitive covered or non-covered designation. If you have claims in flight for these codes, flag them for your compliance officer and confirm status directly from the full policy text before the effective date. |
| 3 | Build the curve-degree documentation requirement into your surgical PA checklist. Adolescents need a documented Cobb angle ≥40°. Adults age 18–25 need ≥50°. Your prior authorization request must include this measurement — along with the patient's age — to align with CPB 0398 criteria. Missing either turns a clean case into a denial. |
| 4 | Verify growing rod device identity before billing. Only the MAGEC System and Shilla growth guidance technique are covered. If your surgeon is using a different expandable magnetic device, it falls under the investigational exclusion. Confirm the device name appears in the operative note and matches one of the two covered systems. |
| 5 | Update your Shilla billing workflow. The Shilla technique has no standalone CPT code. Bill the relevant arthrodesis codes from the 22548–22594 range plus applicable instrumentation codes (22840–22844). Include bone graft add-ons (+20930, +20931, +20936, +20937, +20938) when harvesting occurs. Attach the operative note clearly describing the Shilla technique to support the claim. |
| 6 | Audit O&P provider credentials for DME brace claims. Every scoliosis brace billed to Aetna requires the orthotist to hold ABC or BOC certification, or state licensure where applicable. Pull the credential documentation for each provider before January 17, 2026. One non-credentialed provider billing covered braces creates a systemic denial problem. Confirm specific HCPCS billing codes for each brace type directly with Aetna or your DME billing team — those codes were not available in the policy data extract reviewed. |
| 7 | Stop billing CMT and OMT codes for adult scoliosis patients on Aetna plans. Codes 98940–98943 and 98925–98929 are excluded. If you've been billing these as conservative management leading up to surgery for adult patients, those claims are not payable under this coverage policy. |
If your practice has a high volume of tethering cases or uses non-MAGEC expandable rod systems, talk to your compliance officer before the January 17, 2026 effective date. The financial exposure on surgical denials is significant, and the policy language here is not ambiguous.
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Idiopathic Scoliosis Under CPB 0398
Covered CPT Codes (When Selection Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| 20661 | CPT | Application of halo, including removal; cranial |
| 20664 | CPT | Application of halo, including removal, cranial, 6 or more pins (thin skull osteology) |
| +20930 | CPT | Allograft, morselized, or replacement of osteopromotive material, spine surgery only |
| +20931 | CPT | Allograft, structural, for spine surgery only |
| +20936 | CPT | Autograft for spine surgery only; local (e.g., ribs, spinous process) |
| +20937 | CPT | Autograft for spine surgery only; morselized (through separate skin incision) |
| +20938 | CPT | Autograft for spine surgery only; structural, bicortical or tricortical |
| 22212 | CPT | Osteotomy of spine, posterior or posterolateral approach; thoracic, 1 vertebral segment |
| 22214 | CPT | Osteotomy of spine, posterior or posterolateral approach; lumbar, 1 vertebral segment |
| +22216 | CPT | Osteotomy of spine, posterior or posterolateral approach; each additional vertebral segment |
| 22548 | CPT | Arthrodesis (see policy for full range through 22594) |
| 22550–22594 | CPT | Arthrodesis (multiple approach and level combinations) |
| 22840 | CPT | Posterior non-segmental instrumentation |
| 22841 | CPT | Posterior non-segmental instrumentation |
| 22842 | CPT | Posterior non-segmental instrumentation |
| 22843 | CPT | Posterior non-segmental instrumentation |
| 22844 | CPT | Posterior non-segmental instrumentation |
| 77072 | CPT | Bone age studies |
Codes Requiring Coverage Verification
| Code | Type | Description | Note |
|---|---|---|---|
| 27280 | CPT | Arthrodesis, open, sacroiliac joint, including bone graft and instrumentation | Listed in CPB 0398; coverage status for idiopathic scoliosis indications requires confirmation with Aetna before billing |
| 22836 | CPT | Anterior thoracic vertebral body tethering, including thoracoscopy; up to 7 segments | Listed in CPB 0398; confirm covered or non-covered status from full policy text |
| 22837 | CPT | Anterior thoracic vertebral body tethering; 8 or more vertebral segments | Listed in CPB 0398; confirm covered or non-covered status from full policy text |
| 22838 | CPT | Revision, replacement, or removal of thoracic vertebral body tethering | Listed in CPB 0398; confirm covered or non-covered status from full policy text |
Not Covered / Experimental CPT Codes
| Code | Type | Description | Reason |
|---|---|---|---|
| 0656T | CPT | Vertebral body tethering, anterior; up to 7 vertebral segments | Explicitly non-covered for indications in CPB 0398 |
| 0657T | CPT | Vertebral body tethering, anterior; 8 or more vertebral segments | Explicitly non-covered for indications in CPB 0398 |
| 0790T | CPT | Revision, replacement, or removal of thoracolumbar or lumbar tethering | Explicitly non-covered for indications in CPB 0398 |
| 22505 | CPT | Manipulation of spine requiring anesthesia, any region | Not covered for adult scoliosis |
| 98925 | CPT | Osteopathic manipulative treatment (OMT) | Not covered for indications in CPB 0398 |
| 98926 | CPT | Osteopathic manipulative treatment (OMT) | Not covered for indications in CPB 0398 |
| 98927 | CPT | Osteopathic manipulative treatment (OMT) | Not covered for indications in CPB 0398 |
| 98928 | CPT | Osteopathic manipulative treatment (OMT) | Not covered for indications in CPB 0398 |
| 98929 | CPT | Osteopathic manipulative treatment (OMT) | Not covered for indications in CPB 0398 |
| 98940 | CPT | Chiropractic manipulative treatment (CMT) | Not covered for adult scoliosis |
| 98941 | CPT | Chiropractic manipulative treatment (CMT) | Not covered for adult scoliosis |
| 98942 | CPT | Chiropractic manipulative treatment (CMT) | Not covered for adult scoliosis |
| 98943 | CPT | Chiropractic manipulative treatment (CMT) | Not covered for adult scoliosis |
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