CMS Proposes Replacing G2211 With a Percentage Modifier: What Psychiatry Practices Need to Know

What Is the Proposed G2211 Modifier Change for 2027?

As of August 2026, the CMS CY 2027 Medicare Physician Fee Schedule proposed rule (CMS-1848-P) includes a provision that would retire the G2211 add-on code and replace it with a percentage-based modifier that increases E/M payment by 16% across all visit levels. For psychiatry practices that bill combined medication management and psychotherapy visits, this proposed shift from a flat $16.05 add-on to a scaled percentage means higher reimbursement on higher-level E/M codes and a fundamentally different billing workflow if finalized for January 1, 2027.

• Current structure: G2211 pays a flat rate of approximately $16.05 per visit regardless of the E/M level billed, meaning a 99213 and a 99215 receive the same add-on amount.
• Proposed structure: A two-digit modifier (placeholder MOD1) would replace G2211 and increase the base E/M payment by 16%, scaling the add-on with the complexity of the visit.
• Comment deadline: CMS is accepting public comments through September 14, 2026, with the final rule expected by November 2026.

What CMS Is Proposing and Why

CMS first finalized separate payment for G2211 in the CY 2021 Physician Fee Schedule final rule. Implementation was delayed by statute until January 1, 2024. Since then, the code has become one of the most widely reported add-on codes in outpatient medicine. CMS expected 38% of all specialty E/M claims to include G2211, and in psychiatry, where longitudinal care relationships are the norm rather than the exception, the actual utilization rate has been even higher.

The proposed rule published on July 14, 2026, would make two changes. First, CMS would convert G2211 from a standalone HCPCS add-on code into a two-digit modifier appended directly to the base E/M code. The placeholder name is MOD1, which will be replaced with a permanent modifier designation if finalized. Second, the payment calculation would shift from a fixed dollar amount to a percentage increase. Under the current system, every qualifying E/M visit receives the same flat add-on regardless of level. Under the proposed system, the modifier would increase payment of the associated E/M code by 16%.

CMS has also proposed a second modifier tier, currently called MOD2, that would increase E/M payment by 32% for physicians participating in a Medicare Shared Savings Program ACO or the LEAD Model. This creates a two-track reimbursement structure for visit complexity that did not previously exist.

The rationale CMS offered is straightforward. A flat-rate add-on pays the same whether the underlying visit is a level 3 or a level 5. A percentage modifier ties the complexity payment to the complexity of the visit itself. The American College of Physicians publicly supported the change, noting that it better aligns reimbursement with the actual cognitive load of managing complex, ongoing patient relationships.

How Does the G2211 Change Affect Psychiatry Billing?

The G2211 modifier change affects psychiatry billing because psychiatric care is one of the most inherently longitudinal specialties in outpatient medicine. Patients with major depressive disorder, bipolar disorder, PTSD, schizophrenia, and anxiety disorders often see the same psychiatrist for years, with regular medication checks, therapy coordination, and ongoing assessment. That pattern is exactly what CMS designed G2211 to recognize.

Under the current flat-rate model, a psychiatrist billing a 99214 with G2211 receives approximately $16.05 on top of the base E/M payment. Under the proposed modifier, that same 99214 would receive a 16% increase on the base rate itself. For a 99214 at the 2026 national non-facility rate of approximately $130, a 16% increase equals roughly $20.80, which is about $4.75 more per visit than the current flat add-on. The difference becomes more pronounced at higher E/M levels.

Across the billing companies we vet for psychiatry practices, one pattern we see consistently is that practices underutilize G2211 because the documentation requirements are not well understood. The proposed modifier does not change the clinical criteria for reporting visit complexity. It changes the payment mechanism. If a practice was not billing G2211 before, this is the moment to start, because the revenue left on the table grows with every visit level.

In our experience matching providers with billing partners, the practices most at risk from this change are those using generalist billing companies that have not updated their charge capture workflows to include G2211 or the incoming modifier. A billing team that does not understand the distinction between medical decision-making complexity and visit complexity, which are two different things in the CMS framework, will either skip the modifier entirely or apply it incorrectly and trigger audits.

Revenue Impact: Flat Rate vs. Percentage Modifier

The revenue difference between the current G2211 flat rate and the proposed 16% modifier depends entirely on the E/M level billed. Lower-level visits see minimal change. Higher-level visits generate a meaningful increase. The table below compares the current and proposed add-on amounts at each E/M level using 2026 national non-facility rates.

For psychiatry practices, the most commonly billed E/M levels alongside psychotherapy add-on codes are 99213 and 99214. At the 99214 level, the proposed modifier produces a net gain of roughly $4.75 per visit. For a psychiatrist seeing 20 Medicare patients per day at the 99214 level, that difference translates to approximately $95 per day, or roughly $24,700 per year in additional revenue from the modifier change alone.

The trade-off appears at lower visit levels. A 99212 billed with the proposed 16% modifier would generate less than the current flat G2211 add-on. Practices that routinely bill at the 99212 or 99213 level may see a net decrease unless they adjust their documentation to support higher-level E/M coding where clinically appropriate.

One question we hear constantly from practice managers is whether these numbers justify the compliance work required to transition. For most psychiatry practices billing at the 99214 level or above, the answer is clearly yes. For practices with a heavy 99213 mix, the answer depends on whether their documentation supports moving to 99214 when the clinical complexity warrants it.

What Should Psychiatry Practices Do Before the Final Rule?

The final rule is expected by November 2026, with implementation on January 1, 2027 if finalized. That gives practices roughly four months to prepare. The comment period closes September 14, 2026, and any practice that wants CMS to hear concerns about the impact on lower-level E/M visits should submit comments before that deadline.

Steps to take now:

1. Audit your current G2211 utilization. Pull a report of all E/M claims submitted in the last 90 days and check how many included G2211. If the percentage is below 50% for a psychiatry practice with ongoing medication management patients, you are likely underbilling.
2. Review your documentation templates. The clinical criteria for the modifier will mirror G2211: the visit must involve either a continuing focal point of care or management of a serious or complex condition. Confirm your EHR templates capture language that supports this.
3. Model the revenue impact at your actual E/M level mix. Use the table above and your practice management system to project what the shift from flat rate to percentage modifier means for your specific payer mix and visit volume.
4. Update charge capture and EHR configuration. If finalized, the modifier will replace a separate line item with an appended modifier. Your billing software and EHR need to be configured to apply the new modifier automatically on qualifying visits.
5. Educate providers on the difference between visit complexity and medical decision-making. Visit complexity under the modifier is not the same as MDM complexity used for E/M leveling. Providers need to understand both.
6. Contact your billing company or clearinghouse. Confirm they are tracking the proposed rule and have a transition plan. Billing companies that specialize in psychiatry should already be modeling the impact for their clients.
7. Submit a public comment to CMS if the lower-level visit reduction concerns your practice. Comments are accepted through September 14, 2026, through the Federal Register notice for CMS-1848-P.

Common Billing Mistakes to Avoid During the Transition

The transition from a standalone add-on code to a modifier creates specific compliance risks that psychiatry practices should address before January 2027.

Billing G2211 and the new modifier simultaneously is the most predictable error. Once the modifier takes effect, G2211 as a standalone code would no longer be valid. Any claim submitted with the old code after the effective date will be denied. Billing systems that are not updated to remove G2211 from their charge menus will generate automatic denials on every affected claim.

Applying the modifier to ineligible visits is the second risk. Not every E/M visit qualifies. A first-time psychiatric evaluation (90791 or 90792) without a planned follow-up relationship does not meet the continuing focal point criterion. One-time consultations and second opinions are also ineligible. The modifier applies to ongoing, relationship-based care, which covers most psychiatry encounters but not all.

Providers often come to us after months of lost revenue because their billing team applied the wrong modifier or skipped it entirely. With a 16% payment increase at stake on every qualifying visit, the margin for error is significant. A single missed modifier on a 99215 visit means losing roughly $28 in revenue that the practice earned but never collected.

Underdocumenting visit complexity is a subtler problem. The modifier will attract audit scrutiny precisely because it automatically increases reimbursement. Practices that cannot demonstrate the visit met the continuing focal point or complex condition criteria in the medical record will face recoupment demands. Documentation should reference the longitudinal nature of the care relationship and the ongoing management plan.

Failing to track the comment period timeline is a strategic mistake. If the final rule modifies the proposed 16% rate or adds restrictions not in the proposed version, practices that are not monitoring the rulemaking process will be caught off guard in January.

In-House Billing vs. Outsourced Billing for G2211 Compliance

The G2211 modifier transition adds a layer of complexity that favors billing teams with psychiatry-specific coding expertise. For practices managing billing in-house, the transition requires updating charge capture rules, retraining coders on the modifier criteria, and monitoring the final rule for any changes between the proposed and finalized versions. For practices working with an outsourced billing company, the question is whether that company has the behavioral health expertise to handle the transition without missing revenue.

The most common issue we see providers run into is working with billing companies that treat psychiatry billing like general medical billing. The psychotherapy add-on codes (90833, 90836, 90838) already require precise time documentation and modifier 25 application on the paired E/M. Adding the G2211 successor modifier on top of that creates a three-layer billing structure: the E/M base code, the psychotherapy add-on, and the visit complexity modifier. Generalist billing companies routinely mishandle at least one of those layers.

A billing partner with psychiatry-specific experience should already be communicating with practices about the proposed rule, modeling the revenue impact, and building a transition timeline. If your current billing company has not raised this topic, that is a signal worth paying attention to.

Frequently Asked Questions

Next Steps

Review how the G2211 modifier change fits with the broader 2027 Medicare Physician Fee Schedule changes affecting psychiatry, including the conversion factor reduction and collaborative care RVU increases.

For a full breakdown of how psychotherapy add-on codes work alongside E/M billing, see our guides to CPT 90833 billing and CPT 90836 billing.

If your practice needs a billing partner that understands the layered complexity of psychiatry coding, including time-based documentation, modifier stacking, and the incoming G2211 transition, we can match you with vetted billing companies that specialize in behavioral health.