Medicare May Replace G2211 With Modifiers in 2027. What Should Your Practice Check Now?

If your practice provides ongoing care for patients with serious or complex conditions, you may already know the pattern: a visit clearly involves longitudinal care, the clinician does the work, and yet the claim goes out without G2211 — or comes back denied and nobody is quite sure why. Professional coding discussions have flagged that confusion for some time, and practices describing their own workflows in those discussions report that the add-on is still captured inconsistently.

Now the code itself may change form. In the calendar year 2027 Physician Fee Schedule proposed rule (CMS-1848-P), issued July 14, 2026, CMS proposes to retire G2211 as a separate add-on code and replace it with a modifier appended to the visit itself. This article explains what is being proposed, what it would change in your claim workflow, what it would not change, and what a practice should check now — while the proposal is still a proposal.

What G2211 is today

G2211 is the office and outpatient evaluation and management (E/M) visit complexity add-on code. It recognizes the work involved when a practitioner serves as the continuing focal point for a patient's care, or provides ongoing care related to a single serious or complex condition. CMS finalized separate payment for the code in the CY 2021 Physician Fee Schedule final rule; after a statutory delay, payment was implemented for CY 2025.

Today, when the visit qualifies, G2211 is reported as its own claim line in addition to the base E/M code, and it is paid at a flat rate regardless of the level of the visit. That flat structure is exactly what CMS is now questioning.

Think of it the way a note works. Today the add-on is like recording a finding on its own separate line in the note: it sits next to the main entry and carries its own value. The proposal would turn it into a specifier of the main code instead — much like when a diagnosis gains an added character that sharpens the picture. That character does not live on its own; it changes how the code it accompanies is read, and how much that code is worth.

What CMS proposes for 2027

CMS is proposing two related changes for CY 2027:

• A general modifier in place of the code. G2211 would transition to a modifier appended to the associated E/M base code. In the proposed rule it carries the placeholder name MOD1; if the policy is finalized, CMS would replace that placeholder with a two-digit HCPCS modifier. Instead of a flat-rate payment, the modifier would increase payment for the associated E/M code by 16%, so the same percentage increase would apply across all levels of E/M codes.
• A second, higher modifier for accountable care. A second placeholder modifier, MOD2, would be available only to practitioners participating in a Medicare Shared Savings Program ACO, or to Participant Providers in a Long-Term Enhanced ACO Design (LEAD) Model ACO. It would increase payment for the associated E/M visit by 32%, in recognition of additional resource costs such as total cost of care accountability, quality measure reporting, and care coordination.

Two details of the second modifier matter for planning. Its use would be voluntary, and — under the Shared Savings Program and the LEAD Model alike — it could be billed for all beneficiaries a participating practitioner serves, not only for beneficiaries assigned or aligned to that ACO. Claims submitted with it would also count in Shared Savings Program beneficiary assignment calculations and in historical benchmark and performance year expenditures.

In plain terms: the same visit complexity would still be recognized, but it would travel as part of the E/M line instead of as a separate line with its own flat amount, and the dollar value of recognizing it would rise or fall with the level of the underlying visit.

Why the percentage structure matters to a small practice

Under a flat rate, the add-on is worth the same on a brief, lower-level visit as on a longer, higher-level visit managing a complex condition. Under the proposed percentage structure, the recognition scales with the visit itself: 16% of a higher-level E/M service is more than 16% of a lower-level one. Our reading is that whether that helps or hurts your practice depends on your visit mix — which is something you can measure today, from your own claims, without waiting for the final rule.

The second modifier adds a separate question for practices in accountable care arrangements: if your clinicians participate in a Shared Savings Program ACO or the LEAD Model, the 32% version — not the 16% version — is the one your workflow would need to support, and only for eligible practitioners.

What this proposal is not

• It is not a final rule. CMS issued the proposal on July 14, 2026 and accepted public comments through September 14, 2026. CMS may finalize it as proposed, modify it, or not finalize it. Do not rebuild your charge master or EHR build on a placeholder.
• The modifier names do not exist yet. MOD1 and MOD2 are placeholders in the proposed rule. If finalized, CMS will assign real two-digit HCPCS modifiers; anything your systems need must wait for those assignments.
• It does not change whether a visit qualifies. The complexity being recognized is the same longitudinal-care concept G2211 describes today. A visit that does not reflect continuing responsibility for a patient's care does not become eligible because the mechanism changes from a code to a modifier.
• It is a Medicare Physician Fee Schedule proposal. It should not be read as a rule for every payer. How other payers treat G2211 today varies, and how they would treat a future Medicare modifier is a separate question to verify payer by payer.

The problem underneath the proposal

The mechanics are only half the story. What professional coding forums and physician commentary describe — as an observed pattern in their own practices, not as a measured prevalence — is simpler: eligible visits leave the practice without the add-on at all, documentation does not always show the longitudinal relationship that supports it, and same-day situations — such as a visit reported with modifier 25 — are a persistent source of confusion and denials. A practice that has not fixed capture and documentation under the current code will carry the same leakage into a modifier-based system, just in a new format.

That is why, in our view, the most useful work right now is not a system rebuild. It is measurement and documentation discipline under the rules that are actually in effect today.

What your practice should check before the final rule

• Measure your current capture. Pull a sample of office and outpatient E/M visits from the last quarter and compare how many appear to involve longitudinal care for a serious or complex condition with how many actually carried G2211. The gap between those two numbers is your current exposure — and your baseline for judging the percentage proposal against your visit mix.
• Audit the documentation, not just the code. For sampled visits, check whether the note itself shows the continuing relationship and the practitioner's ongoing responsibility for the patient's care. If the note does not show it, the claim is vulnerable today and would remain vulnerable under a modifier. CMS's own G2211 guidance sets the standard for that review: CMS has not imposed additional documentation requirements for the add-on, and its reviewers may use the medical record — diagnoses, the practitioner's assessment and the plan of care — or the claims history to confirm the medical necessity of the visit and the patient care relationship.
• Review your same-day cases separately. Visits involving modifier 25 are where confusion concentrates. Make sure your team handles them under a written, current policy instead of habit. CMS's G2211 guidance is specific here: Medicare denies payment for G2211 when the same practitioner reports the office or outpatient E/M visit with modifier 25 on the same day — with an exception CMS finalized for CY 2025, under which payment is allowed when the base visit is reported on the same day as an Annual Wellness Visit, a vaccine administration, or another Medicare Part B preventive service.
• Know which version would apply to you. If any of your practitioners participate in a Shared Savings Program ACO or the LEAD Model, identify them now, so you know whether the proposed 32% modifier is even relevant to your practice.
• Prepare the change; do not build it yet. List what would have to change if the proposal is finalized — EHR claim edits, encoder and charge-capture workflows, staff guidance, payer policy checks — and assign an owner to watch for the final rule. The build starts when CMS publishes final modifier assignments, not before.

The bottom line

CMS is proposing to keep paying for longitudinal visit complexity, but to pay for it differently: as a percentage of the visit, attached to the visit, with a higher percentage for practitioners carrying accountable care responsibilities. Nothing about that is final yet. What is already true today is that many practices underuse the existing code or support it with documentation that would not survive a review. Fixing that now improves current revenue and makes your practice ready for whichever version of this policy CMS finalizes.

Healthcode RCM works with small, independent practices on exactly this layer of the revenue cycle: coding and claim-workflow reviews that compare what a practice documents, what it reports, and what it is actually paid — so gaps like an underused add-on code surface before they become a pattern. If your G2211 capture has never been measured, that measurement is the right first step.