The letter arrives on a Tuesday. It asks for 30 patient charts. You have 45 days to respond.
Your front desk looks at you. Your biller looks at you. Nobody is sure which notes are complete.
This is how many chiropractic audits begin. There is no warning. There is a request, a deadline, and a lot at stake. A missing signature or a vague treatment plan can turn a paid claim into a repayment demand.
This guide gives you a practical way to get ready. You will see who audits chiropractors and why. You will see the Medicare rules that matter most. You will also get a documentation checklist, a table of red-flag billing patterns, and a self-audit scorecard you can use today.
Use it before the letter shows up. It is much easier to fix problems on your own schedule.
This article is general education. It is not legal advice. Rules change, and payers set their own policies. Check current guidance and talk to a healthcare attorney or compliance professional about your situation.
What Is a Chiropractic Billing Audit?
A chiropractic billing audit is a review of your claims and patient records. The reviewer checks whether the services you billed were covered, medically necessary, correctly coded, and fully documented.
Audits can be small or large. Some ask for a handful of charts. Others review hundreds of claims over several years.
Most audits look at three things:
- Whether the service is covered under the payer’s rules
- Whether the medical record supports the code you billed
- Whether the claim followed billing rules, such as modifiers and dates of service
The record is the proof. If the note does not show it, the reviewer will treat it as if it did not happen.
Who Audits Chiropractors?
Several groups review chiropractic claims. They have different goals and different powers. Knowing the names helps you respond correctly.
CMS
The Centers for Medicare and Medicaid Services (CMS) runs Medicare. It sets coverage rules and oversees the contractors who review claims.
MACs
Medicare Administrative Contractors (MACs) process Medicare claims in each region. They also run medical review. Most chiropractic audits begin with a MAC.
TPE
Targeted Probe and Educate (TPE) is a MAC review program. It focuses on providers or codes with high error rates or unusual billing patterns. Chiropractors have often been part of it. More on this below.
RACs
Recovery Audit Contractors (RACs) look for improper payments. They review claims after payment. Overpayments may lead to recoupment.
UPICs
Unified Program Integrity Contractors (UPICs) investigate suspected fraud, waste, and abuse. A UPIC review is usually more serious than a routine MAC review. If you receive one, contact a healthcare attorney right away.
OIG
The Office of Inspector General (OIG) is part of the Department of Health and Human Services. It audits programs, publishes reports, and can pursue penalties. OIG has reviewed chiropractic services in the past and has reported high rates of improper payment in some of those reviews.
Commercial Payers and Medicare Advantage Plans
Private insurers run their own audits. Medicare Advantage plans do too. Their rules may differ from traditional Medicare. Always check each contract.
Why Chiropractic Claims Draw Extra Attention
Chiropractic care is a narrow Medicare benefit. That makes it easier for reviewers to compare claims against clear rules.
Medicare covers manual manipulation of the spine to correct a subluxation. It does not cover many services that chiropractors commonly offer. Reviewers know this. They look for gaps between what the patient received and what the claim says.
Other factors raise attention:
- A high share of higher-level manipulation codes
- Very frequent visits with no change in condition
- Notes that look the same from visit to visit
- Missing modifiers or unclear treatment goals
- Billing for services Medicare does not cover
A single flag does not mean wrongdoing. A pattern does get noticed. That is why self-audits matter.
How a TPE Audit Works
TPE is one of the most common ways a chiropractor first meets Medicare review. It is designed to educate, but it can still lead to payment denials.
Here is the usual process:
- Selection. The MAC picks your practice based on data, such as error rates or billing patterns.
- Review letter. You receive a request for a set of records, often 20 to 40 claims.
- Records submission. You send the charts within the deadline listed in the letter, commonly 45 days.
- Review and results. The MAC reviews each claim. Errors lead to denials and possible overpayment notices.
- Education. You receive feedback and are offered an education session.
- Next round. If errors continue, a second round may follow. There may be up to three rounds.
- Referral. If problems remain after the final round, the MAC may refer you to CMS. Possible next steps include extended prepayment review or referral to a RAC.
The purpose is to improve your billing. Take the education offer seriously. Use it to fix the root cause.
Core Medicare Rules to Check Before You Audit Yourself
You cannot audit against rules you do not know. Start here.
Covered Service
Medicare covers chiropractic manipulative treatment (CMT) of the spine for subluxation. The three codes are 98940, 98941, and 98942.
Medicare generally does not cover other services ordered or provided by a chiropractor. Examples include:
- Evaluation and management visits
- Massage
- Therapy modalities and exercises
- X-rays and other diagnostic tests ordered by the chiropractor
- Supplements and devices
Some commercial plans cover more. Medicare does not. Check each payer before you bill.
Active Treatment vs Maintenance Care
Medicare pays for active or corrective treatment. It does not pay for maintenance therapy.
Active treatment aims to improve or arrest a condition. Maintenance care aims to keep a patient comfortable or prevent decline after improvement has leveled off.
The care you describe in the chart must match the care you bill.
Modifier AT
The AT modifier tells Medicare that the treatment is active and corrective. It must go on CMT claims when the care meets that standard. Missing it can trigger denials.
If you believe a service may not be covered, ask whether an Advance Beneficiary Notice (ABN) applies. Certain modifiers, like GA and GZ, relate to ABN status. Check your MAC’s guidance before use.
For a full walkthrough, read this guide on the chiropractic modifier AT and Medicare billing.
Diagnosis and the PART Exam
Medicare requires a primary diagnosis of subluxation. Common ICD-10 codes include M99.01 for the cervical region, M99.02 for thoracic, M99.03 for lumbar, M99.04 for sacral, and M99.05 for pelvic.
A secondary diagnosis must describe the related neuromusculoskeletal condition. Examples include sprains, strains, and radiculopathy.
The subluxation must be shown by physical exam. The PART system is widely used for this:
- P: Pain or tenderness
- A: Asymmetry or misalignment
- R: Range of motion abnormality
- T: Tissue or tone changes
Medicare looks for at least two of the four findings. One of them must be asymmetry or range of motion abnormality. Your notes should show what you found, not just that you looked.
Spinal Regions and CPT Codes
The code you bill depends on how many spinal regions you treat.
- 98940: One to two regions
- 98941: Three to four regions
- 98942: Five regions
Medicare recognizes five regions: cervical, thoracic, lumbar, sacral, and pelvic. The record must name each region treated and support the diagnosis for it.
If you need help choosing between the codes, read this guide on CPT 98940 vs 98941 vs 98942.
Documentation Checklist for Chiropractic Records
Documentation is the center of any audit. Reviewers judge the chart, not your memory of the visit.
Initial Visit
The first visit should include:
- Patient history and chief complaint
- Description of the present illness, including onset and mechanism
- Evaluation of the musculoskeletal and neurological systems
- PART findings that support subluxation
- Primary and secondary diagnoses
- A treatment plan with recommended level of care, specific goals, and objective measures
- The date of initial treatment
- Signed and dated entry
Subsequent Visits
Each follow-up visit should include:
- History and review of the chief complaint
- Changes since the last visit
- Physical exam of the spinal areas involved
- Regions treated that day
- Response to care
- Signed and dated entry
Treatment Plan and Medical Necessity
Medical necessity means the care is reasonable and needed for the patient’s condition. Reviewers look for evidence of it.
Strong records often include:
- Functional outcome tools, such as the Oswestry Disability Index or the Neck Disability Index
- Pain scales, such as the visual analog scale
- Range of motion measures
- Clear goals tied to daily activities
- Re-evaluation at planned intervals
- Notes explaining changes in the care plan
If a patient stops improving, the note should say so. It should also say what you plan to do next.
Signatures and Dates
Every entry needs a legible signature or valid electronic signature. If a signature is missing, Medicare has a process for a signature attestation statement. Do not add or backdate notes. Late entries must be labeled clearly and dated when written.
Avoid Cloned or Templated Notes
Many EHRs auto-fill text. That is useful for speed. It is also a risk. If every note says the same thing for every patient, reviewers may question whether the visit was individualized.
Edit templates. Add the patient’s own findings and response to care each time.
Record Retention
Keep records as long as federal law, state law, and payer contracts require. Many practices keep them for six to seven years or more. Confirm the requirement with your attorney or state board.
Coding and Billing Checklist
Documentation proves the care. Coding and billing turn it into a claim. Errors at this stage can be costly.
Match Codes to Documentation
- Does each code match the regions documented?
- Does the diagnosis support each region billed?
- Is the date of service correct?
- Is the rendering provider correct?
- Is the place of service right?
Check Modifiers
- Is the AT modifier on Medicare CMT claims when needed?
- Is modifier 25 used correctly for separately identifiable services billed to payers that cover them?
- Are ABN-related modifiers used only when appropriate?
Check Provider Enrollment
Make sure your Medicare enrollment and National Provider Identifier (NPI) records are current. Mismatches in names, addresses, or tax IDs can lead to claim problems.
Verify Eligibility and Coverage
Verify benefits before treatment starts. Confirm visit limits, authorization rules, and plan type. Many denials begin with a coverage gap that no one checked.
Use a Claim Scrubber
A claim scrubber checks claims for errors before submission. It can catch missing modifiers, invalid code pairs, and incomplete fields. It does not replace a chart review, but it helps.
Red-Flag Billing Patterns Auditors Look For
These patterns do not prove a problem. They tell reviewers where to look.
| Red-Flag Pattern | Why It Draws Attention | Practical Fix |
|---|---|---|
| Nearly all visits billed as 98941 or 98942 | Suggests upcoding or routine multi-region billing | Review notes for each region treated and the diagnosis that supports it |
| Same regions treated at every visit | May suggest templated care instead of individualized care | Document findings that justify each region each time |
| Missing AT modifier on Medicare CMT claims | Looks like care is not active or corrective | Add AT only when the chart supports active treatment |
| Long treatment with no documented progress | May indicate maintenance care | Re-evaluate, update goals, or issue an ABN where appropriate |
| Identical notes across patients or visits | Suggests cloning | Customize templates and add patient-specific findings |
| Missing or weak PART findings | Subluxation not supported | Record specific exam findings and measurements |
| Services Medicare does not cover billed as covered | May be seen as misrepresentation | Bill only covered services or use proper notices |
| Daily visits for long periods | Frequency may not match medical necessity | Document why frequent care is needed and taper as the patient improves |
| Routine waiver of copays or deductibles | Can raise legal concerns | Apply a consistent, written policy and consult counsel |
| Unsigned or late entries | Weak record integrity | Require timely signatures and label late entries |
Any item in this table can be explained. The problem is having no explanation in the chart.
Chiropractic Self-Audit Scorecard
Use this scorecard to rate your practice. Score each item as follows: 2 points for yes and consistent, 1 point for partly or inconsistent, 0 points for no. Review at least 10 to 20 recent charts for each item.
This scorecard is an internal tool. It is not an official CMS or payer standard.
| Audit Area | What to Check | Score (0, 1, or 2) |
|---|---|---|
| Initial exam | History, exam, and diagnosis are complete | |
| PART findings | At least two findings, with A or R included | |
| Diagnosis | Primary subluxation code and secondary condition match the regions | |
| Treatment plan | Goals, frequency, and duration are written | |
| Outcome measures | Oswestry, NDI, or similar tools used at set intervals | |
| Each visit | Complaint, exam, and response to care are individualized | |
| Regions | Each region treated is named in the note | |
| CPT level | 98940, 98941, or 98942 matches regions treated | |
| AT modifier | Used correctly on Medicare CMT claims | |
| Non-covered services | Not billed to Medicare as covered | |
| ABN use | Notices used correctly and kept on file | |
| Maintenance care | Clearly separated from active treatment | |
| Re-evaluations | Done at planned intervals, with changes recorded | |
| Signatures | Every entry signed and dated | |
| Late entries | Labeled and dated when written | |
| Template use | Notes are edited per patient | |
| Eligibility | Verified before care starts | |
| Provider data | NPI and enrollment records are current | |
| Denial tracking | Denials reviewed monthly for patterns | |
| Staff training | Providers and billers trained at least once a year |
How to Read Your Score
The maximum score is 40.
- 34 to 40: Strong. Keep reviewing on a regular schedule.
- 26 to 33: Some gaps. Fix the low-scoring areas first.
- Below 26: High risk. Start a corrective plan and consider an outside review.
Treat any item scored 0 as urgent. Fix it first.
How to Run an Internal Chart Review
A self-audit works best when it follows a repeatable process.
- Pick a sample. Choose 10 to 20 charts per provider. Include Medicare and commercial patients.
- Use a standard form. Use the scorecard so every reviewer rates the same items.
- Review claims next to charts. Compare codes, modifiers, and dates with the notes.
- Record every error. Note the type of error, the provider, and the claim.
- Calculate an error rate. Divide the number of claims with errors by the number reviewed.
- Find the cause. Ask if the problem is training, a template, a workflow, or a coding rule.
- Fix and retrain. Update templates, give feedback, and set a new standard.
- Repeat on a schedule. Many practices review monthly or quarterly.
If your review finds overpaid claims, do not ignore them. See the section on overpayments below.
What to Do When an Audit Letter Arrives
Stay calm. Act in order.
- Read the letter carefully. Note the requesting party, deadline, and list of claims.
- Calendar the deadline. Add reminders well before the due date.
- Notify your leadership and your attorney. For UPIC or OIG contacts, call counsel first.
- Pull the full records. Include notes, exam forms, treatment plans, signatures, and ABNs.
- Review before sending. Check each chart against the claim.
- Do not alter records. Never add or change notes after the fact to make them look better.
- Submit on time. Use a trackable method and keep proof of delivery.
- Keep a copy of everything. Save the full submission.
- Attend education sessions. If a TPE session is offered, take part.
- Respond to results. Fix the issues and track changes.
If you disagree with a denial, you may have appeal rights. Medicare’s first appeal level is called redetermination. It generally must be filed within 120 days of the initial determination. Read your notice for the exact deadlines.
Overpayments and Corrective Action
If you find that you were paid too much, you may have a duty to report and return the money. Federal rules generally set a 60-day period after an overpayment is identified. Some time is allowed for a good-faith investigation.
Do not guess. Talk to a healthcare attorney about the right way to handle it.
Keep in mind that auditors can sample claims and apply the error rate to a larger group. This is called extrapolation. A small number of errors in a sample can lead to a much larger repayment demand. That is another reason to keep your error rate low.
Commercial Payer Audits Are Different
Private payers and Medicare Advantage plans often follow their own contracts and policies. Many ask for records after a claim is paid. Some use data tools to flag outliers.
Check these items for each payer:
- Records request timelines
- Medical necessity policies
- Visit limits and authorization rules
- Coverage for evaluation and management services and modalities
- Appeal steps and time limits
Never assume that what works for one payer works for all.
Let’s Assume
These examples show how small gaps become large problems.
The Missing AT Modifier
A practice bills Medicare CMT for months without the AT modifier. Claims are denied. The staff resubmits them without checking the notes. Some notes do not show active treatment. The practice needs to fix both the modifier and the documentation.
The Cloned Notes
A provider uses one template for every patient. Findings and plans are identical for weeks. A reviewer flags the charts. The practice cannot show individualized care. The claims are denied.
Code Level Drift
A practice bills 98942 for most visits. The notes list only two regions. A self-audit catches the mismatch. The team retrains the providers and corrects the template. They also review prior claims with counsel.
A Strong Chart Review
A practice scores 36 out of 40 on its scorecard. It sees gaps in re-evaluation timing. It adds a reminder to the EHR. When a TPE letter arrives, the records are ready. The review goes smoothly.
Build Compliance Habits That Last
Passing an audit is not a one-time event. It is the result of daily habits.
- Train providers and staff each year. Cover coding, documentation, and payer rules.
- Build better templates. Include fields for PART findings, regions, and outcome measures.
- Audit on a schedule. Monthly or quarterly reviews catch drift early.
- Track denial reasons. Patterns show training needs.
- Update after rule changes. Review new CMS and payer notices.
- Assign an owner. One person should own compliance tasks.
- Document your policies. A written compliance plan shows good faith.
Accurate coding helps here. Professional medical coding services can review charts against codes and spot gaps. Strong denial management services can trace denial patterns back to their cause.
When to Bring in Outside Help
Some practices have the staff to run audits. Many do not. Outside help can make sense when:
- You have received a TPE, RAC, or UPIC letter
- You have high denial rates or frequent payer questions
- Your staff turns over often
- You are growing and adding providers
- You do not have a compliance owner
A billing partner that knows chiropractic rules can review charts, fix coding gaps, and keep claims clean. Specialized chiropractor revenue cycle management services in SC are built for this kind of work.
Helpful Outside Resources
Other billing teams also publish guidance on audit readiness. This post on audit-ready practices to stay ahead of payers offers another view on payer reviews. The monthly billing audit service from eBridge RCM shows how recurring reviews can work.
Audit Yourself Before Someone Else Does
Audits are stressful. They are also predictable. Reviewers look for the same things: covered services, proof of medical necessity, correct codes, and clean records.
Start with the scorecard. Pull a sample of charts. Check your PART findings, regions, and AT modifier use. Fix gaps early. Train your team. Repeat on a schedule.
If you want help with chiropractic coding, audit prep, or claim cleanup, the team at States Billing Services SC can review your workflow and support your billing. Call today, or visit the chiropractor billing services page to start a conversation.
