CMS Posted the Q4 2026 NCCI Edit Update: What Chiropractic Practices Need to Check Before October 1

What Changed in the October 2026 NCCI Edit Update?

On September 2, 2026, CMS posted the Q4 2026 National Correct Coding Initiative Procedure-to-Procedure edit files (version 32.3), effective October 1, 2026. These files define which CPT code combinations can and cannot be billed together on the same claim, and they are updated every quarter with additions, deletions, and modifier indicator changes. Chiropractic practices that bill CMT codes alongside therapeutic modalities and E/M visits must verify their most common code pairs against the new files before October 1 to avoid unexpected bundling denials.

• What was posted: CMS published the Practitioner PTP and Hospital PTP edit files for Q4 2026 on September 2, with additions, deletions, and modifier indicator changes effective October 1, 2026.
• Why it matters for chiropractic: Every multi-service chiropractic claim runs through NCCI edit logic. A new edit pair added in this update, or a modifier indicator changed from 1 to 0, can turn a previously payable code combination into an automatic denial starting October 1.
• What to do now: Download the Q4 2026 Practitioner PTP additions and deletions file from the CMS NCCI website and cross-reference it against your top chiropractic code pairs before submitting claims with October dates of service.

What CMS Published on September 2

CMS posts NCCI Procedure-to-Procedure edit files every quarter, and the Q4 2026 update (version 32.3) was published on September 2, 2026, effective October 1. The update includes additions of new code pairs, deletions of previously active pairs, and changes to modifier indicators on existing pairs. These files are publicly available on the CMS NCCI PTP edits page and are broken into Practitioner and Hospital Outpatient files.

The quarterly update also includes Medically Unlikely Edit (MUE) changes, which cap the maximum units of service that can be reported for a given code on a single claim. The MUE additions, deletions, and revisions for Q4 2026 were posted on September 1, 2026, one day before the PTP files.

For chiropractic practices, the Practitioner PTP edit file is the one that matters. It governs how your Medicare Administrative Contractor adjudicates multi-service claims. Every code pair in your billing workflow, from CMT codes (98940, 98941, 98942) paired with therapeutic modalities (97110, 97140, 97010) to E/M visits paired with procedures, runs through this file. A code combination that paid in Q3 can deny in Q4 if CMS added a new edit pair or changed a modifier indicator in this update.

How Do CCI Edits Affect Chiropractic Billing?

CCI edits, or Correct Coding Initiative edits, are the automated bundling rules that determine which CPT codes can be billed together. When two codes form an NCCI edit pair, the lower-valued Column 2 code is considered bundled into the higher-valued Column 1 code. Submitting both without an appropriate modifier triggers an automatic denial of the Column 2 code.

Chiropractic practices hit CCI edits more frequently than most specialties because the standard chiropractic visit involves multiple billable services on the same date: a CMT adjustment, one or more therapeutic modalities, and sometimes a separately identifiable E/M visit. Each of those combinations runs through the PTP edit file.

The most common issue we see providers run into is not checking whether an existing edit pair’s modifier indicator changed in the quarterly update. An edit pair that allowed a modifier override (indicator 1) in Q3 could shift to indicator 0 in Q4, meaning the codes can no longer be separated under any circumstance. Practices that do not review the quarterly changes before the effective date submit claims that were valid last quarter but deny this quarter, and the denials do not explain why the rule changed.

What Chiropractic Practices Should Check Before October 1

The October 1 effective date is approaching. Here is how to prepare:

1. Download the Q4 2026 Practitioner PTP Quarterly Additions, Deletions, and Revisions file from the CMS NCCI website. This file shows only the changes, not the full edit list, so it is faster to review.
2. Search the additions file for your top 10 most-billed chiropractic code pairs. Look specifically for 98940, 98941, 98942, 97110, 97140, 97010, 97012, 97530, and any E/M codes you bill alongside procedures.
3. Check for modifier indicator changes on existing edit pairs. An indicator that moved from 1 to 0 means you can no longer override that edit with a modifier. An indicator that moved from 0 to 1 means you now can.
4. Check the deletions file for any edit pairs that have been removed. A deleted edit pair means two codes that were previously bundled can now be billed together without a modifier.
5. Update your claim scrubber or billing software. If your practice management system or clearinghouse uses an NCCI edit check, confirm that it has loaded the October 1 file before you submit claims with October dates of service.
6. Alert your billing team or billing partner. If you work with an outside billing company, confirm that they have reviewed the Q4 update and updated their edit tables. The billing companies in our network update their systems within days of each quarterly CMS release.

For practices that are also preparing for the 2027 Medicare payment changes and the proposed same-day E/M cut, the Q4 NCCI update adds one more item to the pre-October compliance checklist. The same-day E/M reduction proposal, if finalized, would interact directly with CCI edit pairs involving E/M and procedure codes.

CCI Edit Mistakes That Cost Chiropractic Practices Revenue

Across the billing companies we vet, the same CCI edit errors appear in chiropractic practices quarter after quarter:

• Billing 98940 and 98941 together. These form an indicator 0 edit pair that cannot be separated by any modifier. Report the single CMT code that represents the total regions treated. If you manipulated four regions, the code is 98941 alone.
• Appending modifier 59 without documentation. Modifier 59 overrides an indicator 1 edit pair, but only when the chart documents why the services are distinct. A note that says “CMT and manual therapy performed” without specifying different sites or techniques does not support the modifier. The claim may pay initially but will fail on audit.
• Not checking the quarterly update. A code pair that paid in Q3 can deny in Q4 if CMS added a new edit or changed an indicator. Practices that do not review the quarterly additions before the effective date discover the change only after the denial arrives.
• Ignoring 97010 bundling. Hot and cold pack application (97010) is bundled with nearly every therapeutic code in chiropractic billing. Practices that bill 97010 as a standalone service alongside other modalities see consistent denials because the payer’s edit file bundles it into the therapeutic procedure.
• Using the wrong modifier for the payer. Medicare accepts modifier 59, but some commercial payers require X modifiers (XE, XS, XP, XU) instead. Submitting 59 to a payer that requires XS results in a denial that looks like a bundling problem but is actually a modifier-selection error.

Understanding Modifier Indicators: 0, 1, and 9

Every NCCI edit pair carries a modifier indicator that determines whether the bundling can be overridden. Understanding these indicators is the single most important skill in managing CCI edits:

• Indicator 0: The two codes are always bundled. No modifier will separate them. If you see indicator 0 on a pair you bill regularly, the only option is to bill the Column 1 code and not the Column 2 code. Appealing with documentation will not change the outcome.
• Indicator 1: The codes are bundled by default, but a modifier (59 or XE/XS/XP/XU) can override the edit when the services are genuinely distinct. The documentation must support the override: different anatomic site, separate encounter, or distinct clinical purpose.
• Indicator 9: The edit has been deleted and no longer applies. The two codes can be billed together without a modifier.

One question we hear constantly from practice managers is what to do when an indicator changes from 1 to 0 in a quarterly update. The answer is straightforward but painful: you stop billing both codes together. There is no modifier workaround, no appeal path, and no payer exception. The edit is absolute. Adjusting your billing workflow before the effective date prevents the denials entirely.

Frequently Asked Questions

Next Steps

• Download the Q4 2026 Practitioner PTP additions and deletions file from the CMS NCCI website before October 1.
• Cross-reference the changes against your top chiropractic code pairs, especially CMT codes paired with therapeutic modalities and E/M visits.
• Confirm that your claim scrubber or billing partner has loaded the October 1 edit file before submitting claims with October dates of service.