Chiropractic billing issues follow predictable patterns. The specific dollar amounts vary by practice. The issues themselves are almost always the same.
After working with chiropractic practices across the United States, the billing problems that cost chiropractors the most money fall into a consistent set of categories — CMT coding errors, Modifier AT compliance gaps, therapeutic modality documentation failures, active vs. maintenance care documentation problems, and AR denial backlogs that grow because nobody is working them systematically.
What makes chiropractic billing uniquely frustrating is that most of these problems produce no obvious signal. The claim submits. The payment arrives. Everything looks functional. But the payment is wrong — either because the code was wrong, the modifier was missing, or the payer applied a reduction you didn’t question because you didn’t know you should.
This post covers the top chiropractic billing issues in 2026 — what’s causing them, what they’re costing, and exactly how to resolve each one.
Issue #1 — CMT Region Count Errors
The problem:
Chiropractic manipulative treatment is billed based on the number of spinal regions treated in a single session:
- CPT 98940 — 1–2 spinal regions
- CPT 98941 — 3–4 spinal regions
- CPT 98942 — 5 spinal regions
The five spinal regions are cervical, thoracic, lumbar, sacral, and pelvic. Each is a distinct region — treating the cervical and lumbar spine is a 2-region treatment (98940). Adding thoracic involvement makes it 3 regions (98941).
The billing error: most chiropractic practices default to 98940 for the majority of visits regardless of what the procedure note documents. When a chiropractor adjusts cervical, thoracic, and lumbar — three distinct regions — and the claim goes out as 98940, the practice is collecting the 2-region rate for a 3-region procedure.
This happens because:
- Charge tickets default to 98940 and staff bill what’s on the ticket
- Billing teams don’t count regions from the note before assigning the code
- Providers document the adjustment areas without explicitly counting “3 regions treated”
The financial impact: The reimbursement difference between 98940 and 98941 under commercial payers averages $35–$50 per visit. In a practice treating 3+ regions on 60% of daily visits, this undercoding costs $25,000–$45,000 per year.
The resolution:
Revise your procedure note template to require explicit region count documentation — not just “adjusted cervical, thoracic, and lumbar” but “3 spinal regions treated: cervical, thoracic, lumbar.” This one documentation change makes the region count visible at billing and eliminates the ambiguity that produces default 98940 billing.
Train your billing team to count documented regions before assigning the CMT code — not to accept the charge ticket default. The code must match the note, and the note must count the regions.
Issue #2 — Modifier AT Missing on Medicare CMT Claims
The problem:
Medicare covers chiropractic manipulative treatment — but only for active or acute conditions, not maintenance care. Modifier AT is required on every Medicare CMT claim to indicate the service is active treatment rather than maintenance.
Without Modifier AT, Medicare automatically denies the CMT claim. With Modifier AT on a maintenance care visit — treatment designed to maintain a patient’s current condition rather than improve function — the claim constitutes fraudulent billing.
Most chiropractic practices have one of two problems:
Problem A: Modifier AT is missing on some or many Medicare CMT claims because the billing workflow doesn’t systematically apply it. Claims are denied. The billing team resubmits. Revenue is delayed. The root cause — missing modifier — recurs next month.
Problem B: Modifier AT is applied routinely regardless of whether the documented care is active or maintenance. The modifier is present, Medicare pays — but the practice is billing maintenance care as active treatment, which is a compliance violation that creates recoupment exposure on audit.
The financial and compliance impact:
Missing AT produces systematic Medicare CMT denials and revenue delays. Incorrectly applied AT produces paid claims with underlying compliance exposure — the more expensive problem because it creates recoupment risk on claims that have already been collected.
The resolution:
Every Medicare CMT claim requires two confirmations before submission:
First, that Modifier AT is present. This is a pre-submission scrub check — no Medicare CMT claim leaves the system without AT.
Second, that the documentation supports active treatment. This means the session note documents functional improvement goals, objective progress measures, and a clinical rationale for why continued skilled chiropractic treatment is expected to produce functional improvement. Notes that document pain relief without functional progress indicators support maintenance care — not active treatment — and should not carry Modifier AT.
Implement a documentation standard that distinguishes active from maintenance care explicitly. “Patient reports 20% reduction in pain” is not active treatment documentation. “Patient demonstrates improved lumbar flexion from 45° to 68°, consistent with treatment goal of 80° ROM for return to occupational demands” is.
Issue #3 — Therapeutic Modality Claims Denied for Documentation Gaps
The problem:
Electrical stimulation (CPT 97014), mechanical traction (CPT 97012), ultrasound therapy (CPT 97035), and other therapeutic modalities are separately billable alongside CMT — but only when each modality is documented as a distinct therapeutic service with its own clinical rationale.
In most chiropractic practices, modality billing looks like this on the claim: CMT + 97014 + 97035. On the note: “Adjustment performed. E-stim and ultrasound applied.” The billing is there. The documentation isn’t. It reads as a checklist of services performed, not as clinical decision-making that supports separately billed services.
Payers — particularly commercial plans with bundling edit logic — are looking for documentation that answers: why was this modality clinically necessary as a service distinct from the adjustment? When the answer isn’t in the note, the modality claim is bundled into the CMT payment or denied outright.
The financial impact: Modality denials in a practice billing three modality codes per visit at 60% of daily volume represent $15,000–$28,000 per year in lost or delayed revenue.
The resolution:
Document each modality as a separate clinical decision in the note. Not “e-stim applied” but “electrical stimulation applied to lumbar paraspinal musculature to address muscle spasm and facilitate manual therapy — 10 minutes, 80Hz frequency.” Not “ultrasound applied” but “therapeutic ultrasound to right rotator cuff insertion for soft tissue inflammation reduction — 5 minutes, 1MHz, 1.0 W/cm².”
The documentation doesn’t need to be lengthy. It needs to answer: what was the therapeutic target, why was this modality chosen, and what were the treatment parameters. That level of specificity is what distinguishes billable separately documented modality services from unbillable checklist documentation.
Issue #4 — Active vs. Maintenance Care Not Distinguished in Long-Term Patient Notes
The problem:
This is the chiropractic billing issue with the highest compliance stakes — and the most gradual onset.
When a patient begins chiropractic care, the documentation clearly supports active treatment: pain, functional limitation, treatment goals, expected improvement timeline. At visit 4, the documentation is strong. At visit 24, the documentation may look nearly identical — but the clinical status has shifted from active improvement to maintenance of achieved function.
The billing hasn’t shifted. Modifier AT is still present. The same CMT codes are going out to Medicare. But the documentation no longer clearly supports active treatment.
This documentation drift is one of the most common chiropractic audit findings under Medicare. Auditors compare early visit notes to later visit notes and identify the point at which the documentation no longer demonstrates ongoing functional improvement. Every claim past that point — with Modifier AT present — represents potentially incorrectly billed maintenance care.
The resolution:
Implement a documentation review protocol for patients with 8+ weeks of active treatment. At each Progress Report interval, the note should explicitly address:
- Current functional status on objective measures (ROM, strength, functional outcome tool score)
- Change from baseline — is there documented functional improvement?
- Ongoing treatment goal — what specific functional outcome is expected from continued treatment?
- Revised prognosis — what is the expected date of maximum therapeutic benefit?
When objective functional improvement is no longer occurring and the treatment goal has shifted to maintaining current function, the documentation should reflect that — and the billing should shift to reflect the covered vs. non-covered status accordingly. An ABN should be obtained from the patient before maintenance care begins.
This isn’t about billing less. It’s about billing correctly — which is the only sustainable compliance position in a specialty that Medicare audits regularly.
Issue #5 — Personal Injury and Workers’ Compensation Claims Billed Like Commercial Insurance (Chiropractic Billing Issues)
The problem:
Personal injury and workers’ compensation billing in chiropractic allows for more comprehensive evaluation and documentation coding than standard commercial insurance billing — but most chiropractic practices bill PI and WC patients with the same CMT-only charge structure they use for everything else.
For PI cases involving documented trauma, new patient evaluations (99203/99204), functional capacity assessments (97750), and disability assessment documentation are separately billable. For WC cases, work conditioning programs (97545/97546) and return-to-work assessments are separately billable when performed and documented.
Billing CMT only on these cases while delivering and documenting evaluation and assessment services is systematic underbilling that compounds across every PI and WC case in the practice.
The resolution:
For each PI and WC patient intake, identify whether a comprehensive evaluation was performed and documented. When the intake documentation supports a new patient evaluation code (99203 or 99204 based on complexity), bill it alongside the CMT code. For established PI and WC patients with functional capacity assessment documentation, bill 97750 when the note supports it.
Build a PI/WC-specific charge capture prompt into your check-out workflow — a single question: “Was a separate evaluation or functional assessment documented today that isn’t captured on the standard charge ticket?” That prompt alone recovers substantial PI/WC revenue that currently disappears through the gap between clinical documentation and charge entry.
Issue #6 — Denied Claims Sitting in AR Without Follow-Up
The problem:
In most chiropractic practices, denied claims fall into one of two outcomes: easy denials get resubmitted, hard denials don’t get worked. Hard denials — medical necessity, authorization, modality documentation — require clinical records, appeal letters, and follow-up calls that consume more time than a routine resubmission. They accumulate in the AR aging report until they’re past the appeal window and written off.
The collections loss from unappealed chiropractic denials typically runs $20,000–$40,000 per year in a practice with a commercial payer denial rate above 12%. Most of it is recoverable — if pursued before the appeal window closes.
The resolution:
Establish a denial follow-up workflow that treats denial age and denial value as independent priorities. A $600 denied CMT case from day 65 is more urgent than a $90 denied modality case from day 30 — not because it’s older, but because $600 at day 65 is approaching the appeal window on most commercial payers.
Every denied claim needs a defined resolution path within 30 days of denial date:
- Soft denial → correction and resubmission within 5 business days
- Hard denial, documentation gap → formal appeal within 30 days with supporting clinical records
- Hard denial, medical necessity → formal appeal with Progress Report, functional outcome data, and clinical rationale
- Authorization denial → retro-authorization assessment within 14 days of denial
Claims that reach 60 days without documented action are a billing failure — not a billing backlog.
What These Issues Add Up To (Chiropractic Billing Issues)
For a chiropractic practice with two chiropractors and one billing coordinator handling 800–1,000 patient encounters per month:
| Billing Issue | Annual Revenue Impact |
|---|---|
| CMT region count undercoding | $25,000 – $45,000 |
| Modifier AT compliance gaps | $12,000 – $20,000 |
| Therapeutic modality documentation denials | $15,000 – $28,000 |
| PI/WC evaluation codes not captured | $14,000 – $22,000 |
| Unappealed AR denials | $20,000 – $40,000 |
| Total | $86,000 – $155,000 |
None of these require new patients, new services, or new clinical workflows. They require a billing operation that understands chiropractic billing at the level of region count documentation, Modifier AT compliance, modality-specific clinical documentation, and active denial follow-up.
How Malakos Healthcare Solutions Resolves These Issues
At Malakos Healthcare Solutions, chiropractic billing is one of our core specialties. We apply region count verification before CMT code assignment, Modifier AT compliance on every Medicare CMT claim, modality documentation review before billing, PI/WC charge capture optimization, and value-weighted AR follow-up as standard workflow — not as special services.
A free chiropractic billing audit identifies exactly which of these issues your practice has and what they’re costing — in specific dollar terms — before any commitment is made.
Schedule Your Free Chiropractic Billing Audit
📞 +1 (307) 441-3431 ✉️ support@malakoshcs.com 📍 Cheyenne, Wyoming — Serving chiropractic practices nationwide
Related Reading
- Chiropractic Medical Billing Services
- Chiropractic Billing Case Study — $198K Recovery
- Medical Coding Services
- Denial Management Services
Malakos Healthcare Solutions | Chiropractic Medical Billing Services USA | Serving independent chiropractic practices and multi-provider groups nationwide
