CPT Code Changes for 2026: What Small Practices Must Update Now

The 2026 CPT code set took effect on January 1, 2026, and it is one of the larger annual updates in recent years: 418 changes in total, including 288 new codes, 84 deletions, and 46 revisions. For a small practice, the risk is not abstract. A deleted code left in your charge master or EHR picklist does not get paid at a lower rate — it gets rejected outright, and the claim has to be corrected and resubmitted, assuming you catch it before a timely filing deadline expires. If your practice has not fully worked through the update yet, this guide covers what changed, which changes matter most, and the checklist to finish the job. For practices that would rather hand the update off, UMB and Coding’s medical coding services include charge-master reviews and coding audits built around exactly this kind of annual change.

What Changed in the 2026 CPT Code Set?

The American Medical Association (AMA) revises the Current Procedural Terminology (CPT®) code set every year, and the 2026 edition reflects three clear trends: remote care becoming routine, AI-assisted diagnostics earning their own codes, and several procedure families being rebuilt from scratch rather than tweaked. Category I codes in the 2026 set took effect January 1, 2026, although individual payers adopt and publish their own payment policies on their own schedules, so a valid code and a payable code are not always the same thing in the first months of the year.

Which 2026 CPT Changes Matter Most for Small Practices?

Most small practices will never touch the majority of the 418 changes. The ones below are the highest-impact families, because they either replace codes that were billed every day or open up services many practices already provide but could not previously report cleanly.

Lower extremity revascularization is rebuilt

The biggest single restructuring in the 2026 set is lower extremity revascularization. The long-standing code family 37220–37235 has been deleted and replaced by roughly 46 new codes organized by vascular territory — iliac, femoropopliteal, tibial-peroneal, and inframalleolar — with lesion complexity built into code selection. If your practice does vascular or interventional work, this is not a find-and-replace exercise: the new codes require different documentation (territory, lesion characteristics, and access details) than the old family did, and mapping an old code to a new one without that documentation invites both denials and compliance exposure.

Remote monitoring gets shorter windows and a lower time threshold

Remote patient monitoring (RPM) and remote therapeutic monitoring (RTM) continue to expand. The 2026 set adds codes for short-duration monitoring periods of just 2–15 days within a 30-day period, alongside new treatment-management reporting once cumulative monthly time reaches 10 minutes — down from the previous 20-minute threshold (codes 99457 and 99458 still apply at 20 minutes and above). Device supply codes 99453 and 99454 may now be reported when monitoring occurs on at least two days in a 30-day period. For small practices, this matters because shorter monitoring episodes — a post-discharge check-in, a two-week blood pressure run — can now be reported instead of written off as unbillable care coordination.

AI-assisted diagnostics enter the code set in earnest

The 2026 set adds codes for algorithm-assisted services that support, rather than replace, clinician judgment: coronary plaque assessment from CT data, perivascular fat analysis for cardiac risk, multispectral imaging for burn depth and wound healing, and CT-based classification of interstitial lung disease, among others. The documentation bar here is different from a standard imaging code: payers increasingly expect the record to show algorithm involvement, human oversight, and how the output changed or confirmed the clinical decision. If your practice is offered an AI tool, ask the vendor which CPT codes it maps to and what documentation it produces before you buy — the tool’s marketing sheet is not a coding guideline.

Hearing device services are replaced, not just revised

Legacy hearing-aid service codes 92590–92595 have been deleted and replaced with 12 new codes covering evaluation, fitting, follow-up, and patient training, including support for personal devices connected to hearing devices. Audiology and ENT-adjacent practices should treat this the same way as the revascularization rebuild: a full picklist replacement, not a patch.

What Happens If You Bill a Deleted CPT Code?

A deleted code is not a code that pays less or needs a modifier. It is a code that no longer exists in the code set, so the payer’s system cannot price it. The usual sequence is a rejection (not a denial you can appeal on medical necessity), a corrected claim, and a second trip through adjudication — all of which burns staff time and pushes the claim closer to the payer’s timely filing limit. That last point is where small losses become permanent ones: if the rejection is not spotted and corrected inside the filing window, the revenue is gone, not delayed. Practices that have already dealt with deadline pressure know the pattern — our guide to timely filing limits by payer for 2026 shows how short some of those windows are, and a reworked claim has far less margin than a clean one.

Revised codes fail more quietly. The claim goes through, but under a descriptor or bundling rule you have not adjusted for — an add-on code that is now bundled, a guideline that now requires a different diagnosis pairing — and the result is a partial payment or a denial that looks like a payer quirk rather than a coding error. That is why the update checklist below covers revisions and deletions with equal weight, and why a coding audit after a big code-set year catches problems a simple code swap misses. Our roundup of the medical coding errors that trigger denials covers the recurring patterns that a stale charge master tends to produce.

How Do You Update Your Charge Master for 2026 CPT Codes?

Work through this checklist in order. It is written for a small practice without a dedicated coding department — one person with a spreadsheet and access to the EHR and billing system can complete it in a focused week.

1. Pull your 2025 code utilization report. Export every CPT code billed in the last 12 months, ranked by volume and revenue. This is your real scope: you only need to research the changes that touch codes you actually use, plus any new codes for services you already provide.
2. Flag every deleted and revised code on that list. Cross-reference your utilization report against the AMA’s 2026 deleted and revised lists. Deleted codes get a replacement mapping; revised codes get a note on what changed in the descriptor or guideline.
3. Map replacements, don’t guess them. A deleted code rarely maps one-to-one to a new code. The revascularization rebuild is the extreme case, but even simpler replacements can split by anatomy, technique, or time. Confirm each mapping in the CPT 2026 codebook or your encoder, and record the documentation each new code requires.
4. Update the charge master and every picklist. The charge master, the EHR’s favorite lists, superbills, and any paper encounter forms must all change together. A corrected charge master with an uncorrected superbill will keep generating deleted codes for months.
5. Update fee schedules and payer rules alongside the codes. New codes need prices, and payers publish their own coverage and payment policies for them at different times. A code with no fee schedule entry bills at whatever default your system assigns — often zero or an old placeholder.
6. Retrain the people who pick codes. A 15-minute huddle beats a memo nobody reads. Cover the deleted codes your practice used most, the new codes for services you already provide, and the documentation changes for revised codes.
7. Run a pre-bill edit check for 30 days. Hold or scrub claims carrying any 2026 new, deleted, or revised code for the first month, and review the first batch of remittances for those codes line by line. Early detection is the difference between a fix and a write-off.
8. Audit the first quarter. Once Q1 remittances are in, audit denial reasons for every code touched by the update. If a new code is denying at a high rate, the cause is usually documentation or a payer policy lag, not the code itself — but you have to look to know which.

How Do You Check Your EHR and Billing System Are Ready?

Vendor updates are necessary but not sufficient. Confirm three things directly, rather than assuming a vendor patch covered them. First, that the 2026 code set is actually loaded and active in both the EHR and the billing system — patches sometimes load into one and not the other, and claims built in the EHR inherit its version. Second, that your claim scrubber’s edits reflect the 2026 deletions and bundling rules; a scrubber running 2025 rules will pass deleted codes straight through. Third, that any custom fee schedules, superbills, and patient-facing estimates were regenerated after the update rather than carried over. A quick test is to build a test claim for each of your top five changed codes and watch it pass through scrubbing — five minutes of testing beats five weeks of rework.

One more caution: payer adoption lags. Medicare and commercial payers generally align with the January 1 effective date for Category I codes, but coverage policies, fee schedules, and prior-authorization requirements for new codes — especially AI-assisted and RPM codes — can arrive weeks later. If a new code denies in January or February, check the payer’s published policy before assuming the code was wrong; re-billing the same claim unchanged rarely fixes a policy lag, and appealing with the payer’s own bulletin attached usually does.

FAQs

When did the 2026 CPT codes take effect?

Category I codes in the 2026 CPT code set took effect on January 1, 2026. Category III (emerging technology) codes follow their own release schedule, and individual payers publish payment policies on their own timelines, so always confirm a payer’s policy for a new code before relying on it for revenue.

How many CPT codes changed in 2026?

The 2026 set contains 418 changes: 288 new codes, 84 deletions, and 46 revisions. The deletions and revisions cause more lost revenue than the new codes, because they break existing billing workflows that previously worked.

Can I still bill a deleted CPT code if the service was performed in 2025?

Yes — the code set that applies is the one in effect on the date of service, not the date you submit the claim. A December 2025 service is reported with 2025 codes even if you bill it in 2026. Problems arise when a 2026 date of service is reported with a code deleted effective January 1, 2026.

Do I need to buy the CPT 2026 codebook?

Your encoder or EHR vendor’s update covers most day-to-day coding, but the codebook (or the AMA’s CPT Changes 2026 guidance) is worth having for the code families your practice uses most, because it explains the intent behind restructures like revascularization in a way a code list cannot.

What is the fastest way to find which 2026 changes affect my practice?

Start with your own utilization report: the codes you billed most in the past year. Cross-reference that short list — usually 30 to 60 codes for a small practice — against the deleted and revised lists. That focused check catches nearly all of your exposure in an afternoon; the full 418-change list matters mostly to coders and multi-specialty groups.

Next Steps

The 2026 CPT update rewards practices that treat it as a project with a deadline, not a background task. Pull your utilization report, map your deleted and revised codes, update every picklist at the same time, and audit the first quarter’s remittances for the codes you changed. If the update is still sitting half-finished — or if your denial rate has climbed since January — a focused coding review usually pays for itself in recovered claims. Contact UMB and Coding for a free practice audit, or call (201) 942-0949 to talk through your charge-master update.