What Is Happening to G2211 in 2027?
As of September 2026, CMS has proposed eliminating HCPCS add-on code G2211, the visit complexity code used by family medicine and primary care practices since January 2024, and replacing it with two percentage-based modifiers in the CY 2027 Physician Fee Schedule proposed rule (CMS-1848-P). The standard modifier would add 16% to the base E/M payment, while the ACO modifier would add 32% for practices in qualifying accountable care organizations. The comment period closed September 14, 2026, and the final rule is expected in November 2026.
What changes: G2211 would no longer be a separate add-on code billed as its own line. Instead, a modifier attached to the E/M code would increase the base payment by a percentage, meaning higher-level visits pay more than lower-level visits.
Who benefits: Family medicine practices that bill mostly 99214 and 99215 visits would earn more per visit under the percentage model than the current flat $16. ACO participants would see an even larger increase at the 32% tier.
What to do now: Track the final rule expected November 2026. Model the revenue impact across your E/M distribution. Prepare your billing system for a code-to-modifier transition if the change is finalized.
What CMS Proposed for G2211
In the CY 2027 Physician Fee Schedule proposed rule published July 14, 2026, CMS included a provision that would eliminate G2211 as a standalone HCPCS add-on code and replace it with two new modifiers. The current G2211 pays a flat rate of approximately $16 per visit regardless of the E/M level billed. The proposed replacement would tie the visit complexity payment to a percentage of the base E/M code, which means higher-complexity visits would generate higher complexity payments.
The two proposed tiers are a standard modifier adding 16% to the base E/M payment for all eligible practitioners, and an enhanced modifier adding 32% for practitioners in qualifying ACO models, including the Medicare Shared Savings Program (MSSP). CMS stated that approximately 75% of primary care physicians already participate in some form of ACO, so the 32% tier would apply to the majority of family medicine practices that are already in these arrangements.
Both the AAFP and the American College of Physicians (ACP) reacted favorably to the proposed change. The ACP noted that shifting from a flat add-on to a percentage better reflects real differences in physician work across visit levels and simplifies billing by removing a separate claim line. The comment period on the proposed rule closed September 14, 2026, and the final rule is expected in November 2026. For the broader context of the 2027 Medicare payment changes affecting family medicine, including the conversion factor decrease, see our overview.
How Would the G2211 Replacement Change Your Revenue?
The revenue impact depends entirely on your E/M billing distribution. Under the current flat G2211 at approximately $16 per visit, every qualifying visit earns the same add-on regardless of complexity. Under the proposed percentage model, higher-level visits earn more and lower-level visits earn less.
| E/M Code | 2026 G2211 Flat Add-On | Proposed 16% Modifier | Proposed 32% (ACO) |
|---|---|---|---|
| 99213 (~$98) | ~$16 | ~$16 (roughly flat) | ~$31 |
| 99214 (~$143) | ~$16 | ~$23 (+$7/visit) | ~$46 (+$30/visit) |
| 99215 (~$193) | ~$16 | ~$31 (+$15/visit) | ~$62 (+$46/visit) |
These figures are illustrative, based on approximate 2026 national Medicare non-facility rates, and the actual 2027 rates will depend on the finalized conversion factor. But the pattern is clear: family medicine practices that bill predominantly 99214 and 99215 visits would earn significantly more per visit under the percentage model than under the flat G2211. Practices that bill mostly 99213 visits would see roughly the same payment on the standard 16% tier.
Now scale it. A family medicine practice billing 120 qualifying E/M visits per week, with 60% at the 99214 level, currently earns about $1,920 per week from G2211 (120 visits times $16). Under the 16% modifier with the same visit mix, the weekly add-on rises to approximately $2,340. Under the 32% ACO modifier, it rises to approximately $4,680. Over a year, that is a difference of roughly $21,800 on the standard tier and $143,500 on the ACO tier compared to the current flat G2211. The numbers make the CMS intent clear: this is designed to incentivize ACO participation while still increasing payment for all primary care.
The G2211 replacement would change how every qualifying E/M visit pays in 2027. If your practice has not modeled the revenue impact across your E/M distribution, a specialized family medicine billing partner can run that analysis and identify whether the standard or ACO tier benefits you more. Rates start as low as 2.95%.
What Family Medicine Practices Should Do Now
The comment period has closed, but the final rule has not been published. Here is what to do while waiting:
1. Pull your E/M distribution for the last 12 months. Break it down by code level (99211 through 99215) for Medicare patients only. This is the data you need to model the revenue impact of the flat-to-percentage shift.
2. Calculate the difference. Apply the 16% modifier to each E/M level and compare the total to your current G2211 revenue. If your practice is in an ACO, run the 32% calculation as well.
3. Review your ACO participation status. If your practice is not currently in an ACO but the 32% modifier would materially change your revenue, this is the time to evaluate whether joining an MSSP ACO makes financial sense for 2027.
4. Audit your current G2211 utilization. Across the billing companies we vet, a recurring pattern is that practices under-bill G2211 because the documentation requirements feel unclear. Before the code transitions to a modifier, verify you are billing G2211 on every qualifying visit where you serve as the continuing focal point of care.
5. Prepare your billing system for the transition. If the final rule eliminates G2211 and creates a modifier, your EHR auto-population rules, superbill templates, and claim scrubber logic all need to be updated. A code-to-modifier transition is a system configuration change, not a one-line update.
6. Track the final rule. CMS publishes the Physician Fee Schedule final rule in early to mid November. The G2211 provision could be finalized as proposed, modified, or withdrawn based on the comments received.
Mistakes to Avoid During the Transition
Providers often come to us after a billing transition has already cost them revenue because their workflow was not updated in time. Here are the mistakes to avoid:
Assuming G2211 survives unchanged. Both the AAFP and ACP support the proposed change. While CMS could modify the details, the shift from a flat add-on to a percentage-based modifier has strong specialty society backing. Practices that do not prepare for the transition risk billing disruptions on January 1.
Not evaluating ACO participation. The 32% ACO modifier is double the standard rate. For practices that are not currently in an ACO but could qualify, the revenue difference is substantial enough to justify a serious evaluation before the 2027 enrollment window closes.
Under-billing G2211 in the remaining months. One question we hear constantly from practice managers is whether G2211 is worth the effort to bill in the last few months of 2026. The answer is yes. At $16 per visit, a practice with 100 qualifying visits per week that is not billing G2211 is leaving $83,200 per year on the table. Bill it on every qualifying visit through December 31, 2026.
Ignoring the documentation shift. G2211 as a code required documentation of a longitudinal relationship or a single serious condition. The modifier replacement may change how that documentation is captured and reviewed. Watch the final rule for updated documentation guidance.
Not informing the billing team. A code-to-modifier transition changes how claims are built. The billing team or billing partner needs advance notice to update their systems, not a same-day alert on January 1.
What the G2211 Change Signals for Primary Care
The G2211 replacement is not an isolated code change. It is part of a larger CMS strategy to increase primary care payment while incentivizing accountable care participation. The 2027 proposed rule also includes prospective primary care payment for MSSP ACOs, behavioral health code increases, and new coverage for group medical visits and health coaching.
For family medicine practices, the message from CMS is clear: longitudinal, relationship-based care will be paid more, and practices that take financial accountability for their patient population through ACO participation will be paid the most. The flat G2211 was a step in that direction. The percentage-based modifier with an ACO tier is a bigger step.
In our experience matching providers with billing partners, the practices that capture the most revenue from primary care add-on codes are the ones with systematic billing workflows: the code or modifier is applied automatically based on the patient’s relationship status and the practice’s ACO participation, not left to the individual biller’s memory. Whether G2211 stays as a code or transitions to a modifier, the billing discipline is the same. Build it into the system, not the habit.
Frequently Asked Questions
Is G2211 being eliminated?
CMS proposed eliminating G2211 as a standalone add-on code and replacing it with percentage-based modifiers in the CY 2027 Physician Fee Schedule proposed rule. The comment period closed September 14, 2026, and the final rule is expected in November 2026. The change is not yet finalized.
What would replace G2211?
CMS proposed two modifiers: a standard modifier adding 16% to the base E/M payment for all eligible practitioners, and an enhanced modifier adding 32% for practices in qualifying ACO models such as the Medicare Shared Savings Program. Both would attach to the E/M code instead of billing as a separate line.
Would family medicine earn more or less under the new modifiers?
It depends on your E/M distribution. Practices billing mostly 99214 and 99215 visits would earn more per visit than the current flat $16. Practices billing mostly 99213 visits would earn roughly the same on the standard 16% tier. ACO participants would see the largest increase at the 32% tier.
Does my practice need to join an ACO to benefit?
No. The standard 16% modifier would apply to all eligible practices regardless of ACO participation. However, the 32% ACO modifier pays double the standard rate, which represents a significant revenue difference for practices that qualify.
Can I still bill G2211 in 2026?
Yes. G2211 remains a valid, billable add-on code through December 31, 2026. Bill it on every qualifying E/M visit where you serve as the continuing focal point of care. The proposed changes would take effect January 1, 2027 if finalized.
What documentation does the modifier replacement require?
The final documentation requirements have not been published. Under the current G2211, documentation must support that the practitioner is the continuing focal point for the patient’s overall care or is managing a single serious or complex condition over time. Watch the final rule for any changes to documentation guidance.
Next Steps
Model the revenue impact of the 16% and 32% modifiers on your current E/M distribution before the final rule is published.
Evaluate ACO participation for 2027 if the 32% tier would materially change your primary care revenue.
Continue billing G2211 on every qualifying visit through December 31, 2026.
The G2211 replacement is the most significant primary care billing change in the 2027 proposed rule. Whether CMS finalizes the percentage-based modifiers or adjusts the approach, your billing workflow needs to be ready for whichever system your payers adopt on January 1. Family Medicine Billing is powered by Billing Service Quotes. Matching is 100% free for providers, with rates starting as low as 2.95% and matches typically returned within 30 minutes.
