Billing insurance and Medicare for chiropractic services can be tricky. With limited covered procedures, strict documentation guidelines, and modifier requirements, it’s no surprise that many practices struggle with denials or underpayment. This guide breaks down chiropractic insurance billing and Medicare billing so your claims get accepted—and paid—on the first try.
Understanding Chiropractic Insurance Billing
Most commercial insurance plans cover chiropractic care, but policies vary in:
- Covered services (adjustments vs. therapeutic modalities)
- Visit limits (e.g., 12 visits per year)
- Medical necessity rules
- Preauthorization requirements
- Documentation expectations (SOAP notes)
To succeed with chiropractic insurance billing, always:
- Verify coverage before treatment
- Use CPT and ICD-10 codes that align with the payer’s policies
- Document medical necessity and functional improvement
- Use correct modifiers (e.g., 25 when E/M services are provided)
Billing Medicare for Chiropractic Services
Medicare only covers manual spinal manipulation to correct a subluxation. No other services (e.g., exams, x-rays, therapies) are reimbursed under Medicare Part B.
Medicare-Covered CPT Codes:
| Code | Description |
|---|---|
| 98940 | Spinal manipulation: 1–2 regions |
| 98941 | Spinal manipulation: 3–4 regions |
| 98942 | Spinal manipulation: 5 regions |
Not Covered by Medicare:
- 99202–99214 (E/M services)
- X-rays, therapeutic modalities, massage therapy
- Supplies, braces, and orthotics
Essential Modifiers for Medicare Chiropractic Billing
| Modifier | Purpose |
|---|---|
| AT | Active treatment – Required for Medicare to consider the service “medically necessary” |
| GA | ABN signed – Used when the service may not be covered |
| GZ | No ABN signed – Used when service is expected to be denied |
| GP | Used if PT services are involved (non-reimbursable for DCs) |
Note: Missing or misused modifiers are the #1 reason for Medicare chiropractic claim denials.
ABN (Advance Beneficiary Notice) & Non-Covered Services
When a service is not covered by Medicare, the provider must issue an ABN:
- ABNs inform the patient that Medicare likely won’t pay
- Required when transitioning from active to maintenance care
- Must be signed prior to the service
- Allows the chiropractor to bill the patient directly if Medicare denies
Chiropractic Billing Medicare Checklist
- Confirm subluxation with physical exam
- Use correct ICD-10 code (e.g., M99.01 – M99.05)
- Link ICD-10 to the appropriate 9894x code
- Attach AT modifier if under active treatment
- Use GA/GZ if ABN applies
- Keep SOAP notes and treatment plans up-to-date
- Track visits and reevaluate necessity regularly
Common ICD-10 Codes for Medicare Chiropractic Billing
| ICD-10 Code | Description |
|---|---|
| M99.01 | Subluxation – cervical region |
| M99.02 | Thoracic subluxation |
| M99.03 | Lumbar subluxation |
| M54.5 | Low back pain (supporting code) |
| M54.2 | Neck pain (supporting code) |
Always include the subluxation code as the primary diagnosis.
Insurance vs. Medicare Chiropractic Billing
| Aspect | Insurance | Medicare |
|---|---|---|
| Services covered | Varies – adjustments, therapy, exams | Only spinal manipulation |
| Modifiers required | 25, GP (sometimes) | AT, GA, GZ |
| ABN needed | Rare | Frequently |
| ICD-10 flexibility | More options | Must show subluxation |
| Preauthorization | Often required | Not required but subject to audits |
Billing Tips from Chiropractic Billing Experts
- Always verify eligibility before first visit
- Keep a Medicare cheat sheet for staff with modifier use and covered codes
- Use billing software that auto-prompts for modifier use and ABN tracking
- Audit 10% of Medicare claims monthly to reduce audit risk
- Train front desk to collect and explain patient balances clearly
Conclusion
Chiropractic insurance and Medicare billing requires precision, compliance, and ongoing education. While private payers may allow broader coverage, billing Medicare for chiropractic services is rigid and unforgiving. That’s why investing in the right billing workflow—and training your staff—is essential to keep your revenue flowing and your practice audit-ready.