Who Can Bill G2211 – and Who Cannot

“Who can bill G2211?” gets asked as if there were a list of approved specialties. There is not, and CMS has said so in about as plain a sentence as CMS ever writes. The eligibility limits that do exist are real, but they run along different lines than most people expect: base code, E/M family, entity type, and relationship — not credential and not specialty.

The rule, stated by CMS

From MLN Matters article MM13473:

“All medical professionals who can bill office and outpatient evaluation and management (E/M) visits (CPT codes 99202–99205 and 99211–99215), regardless of specialty, may use the code with office and outpatient E/M visits of any level. We don’t restrict G2211 to medical professionals based on specialties.”

CMS’s published G2211 FAQ carries the same rule and extends it to the newer base codes: “All medical professionals who can bill Medicare for office/outpatient (O/O) evaluation and management (E/M) visits… or home or residence E/M visits… may report HCPCS add-on code G2211.” The FAQ adds that the code “is separately payable to the billing physician or practitioner in both facility and non-facility settings and is not limited to any physician specialties.”

So the eligibility test is derivative. If you can bill Medicare for the base code, you are eligible to bill the add-on. The question then becomes whether this particular encounter meets the relationship test.

Practitioner types

Because eligibility follows the base code, the set of practitioners who may report G2211 is the set who may bill Medicare for office/outpatient or home/residence E/M visits. That includes physicians across every specialty, and it includes non-physician practitioners billing under their own Medicare enrolment — nurse practitioners, physician assistants and clinical nurse specialists among them.

CMS’s language in MM13272 confirms the intended audience by listing affected providers as “physicians, nonphysician practitioners, hospitals, and other providers who bill Medicare Administrative Contractors for O/O E/M services.”

There is no separate enrolment, attestation or registration for G2211.

Specialty: what CMS expected versus what CMS allowed

It is worth separating two things that often get conflated.

CMS’s budget modelling assumed the add-on would be reported chiefly by “specialties that rely on office/outpatient E/M visits to report the majority of their services.” That is a forecasting assumption about who would use it. It is not a rule about who may.

CMS’s policy imposes no specialty restriction whatsoever, and CMS has gone out of its way to illustrate specialty use. Its FAQ states: “We provide a couple examples to clarify the use of HCPCS add-on code G2211 in the context of specialty care. For example, HCPCS add-on code G2211 could be billed by an infectious disease physician who is part of ongoing care for a patient with HIV (a single, serious condition and/or complex condition), or a practitioner who is part of ongoing care for a patient with sickle cell disease.”

Specialists managing a condition longitudinally are squarely inside the second limb of the descriptor. Endocrinology, rheumatology, nephrology, oncology, haematology, infectious disease, neurology and behavioural health all routinely produce encounters that fit — provided the relationship is genuinely ongoing rather than consultative and closed.

Who cannot bill G2211

The real constraints, in the order they are most likely to bite:

1. Anyone reporting a base code outside the two permitted families

CMS’s FAQ: “HCPCS add-on code G2211 cannot be billed with code sets for other E/M services (e.g., hospital inpatient, emergency department, and nursing facility).” This is a hard structural limit, and it excludes several groups almost entirely:

• Emergency medicine. ED visit codes are not permitted base codes.
• Hospitalists billing initial or subsequent hospital inpatient or observation care.
• Practitioners billing nursing facility visits.
• Critical care and consultation services.

Note the asymmetry with the home/residence expansion. Effective January 1, 2026, home-based primary care practices can bill G2211 with CPT 99341, 99342, 99344, 99345 and 99347–99350. Nursing facility visits remain excluded. A practice covering both settings has to split its behaviour by code family.

2. Practitioners whose relationship with the patient is discrete or time-limited

This is the substantive test, and it excludes encounters rather than people. CMS’s FAQ lists examples where the add-on “would not be appropriately reported”:

“…when the care furnished during the O/O or home or residence E/M visit is provided by a professional whose relationship with the patient is of a discrete, routine, or time-limited nature; such as, but not limited to, a mole removal or referral to a physician for removal of a mole; for treatment of a simple virus; for counseling related to seasonal allergies, initial onset gastroesophageal reflux disease; treatment for a fracture; and where comorbidities are either not present or not addressed, and/or when the billing practitioner has not taken responsibility for ongoing medical care for that particular patient with consistency and continuity over time, or does not plan to take responsibility for subsequent, ongoing medical care.”

The clause about future intent does real work. A practitioner who resolves a discrete problem and discharges the patient back to their referrer has not taken and does not plan to take ongoing responsibility, whatever the complexity of the problem was.

3. FQHCs and RHCs

Not a prohibition on reporting so much as an absence of payment. CMS: “The service described by HCPCS add-on code G2211 is bundled into the RHC all-inclusive rate or FQHC prospective payment system payment rate along with the service described by the O/O E/M base code… There is no separate payment made to an FQHC or RHC for HCPCS add-on code G2211.” Commenters pressed CMS in the CY 2026 rulemaking to change this; CMS treated the request as outside the scope of what it had proposed.

4. Anyone reporting G2211 without a base code

It cannot stand alone. This produces an immediate denial and is a common cause of rejected lines in practices where the add-on is triggered by a template rather than attached to a claim line.

Split or shared visits

Where a physician and an NPP in the same group both contribute to a visit in a facility setting, the split or shared rules determine who bills. CMS pays the practitioner who performs the substantive portion, and from January 1, 2024 the substantive portion is more than 50 percent of the total time or the substantive part of medical decision making (MLN Matters MM13592). The claim must carry the designated split or shared modifier, and the record must identify both practitioners with the biller signing and dating.

G2211 follows the base visit. Whoever properly bills the base E/M is the practitioner in whose name the add-on is reported, and the relationship test is applied to that practitioner or to the care team of which they are part.

Incident-to and the teaching setting

Incident-to. Where an office visit is properly billed under a physician’s number through the incident-to rules, the add-on attaches to that claim on the same terms. The incident-to conditions are demanding and setting-specific in their own right — our guide to incident-to billing and its conditional test works through them.

Primary care exception. CMS addressed this directly. Physicians may bill under the primary care exception for lower-level office/outpatient visits furnished by residents in qualifying primary care training settings, appending modifier GE to CPT 99202–99203 and 99211–99213. CMS confirms: “The HCPCS add-on code G2211 can be billed for services furnished under the primary care exception if the criteria for billing HCPCS add-on code G2211 are met.” CMS also notes the temporary COVID-era extension of the exception to level 4 and 5 visits is no longer in effect.

The group practice question

Where a patient is seen by a partner rather than their usual practitioner, CMS permits the relationship to attach to a team. From the FAQ: “when a patient sees another physician or practitioner in a team-based care practice, and if all other requirements of HCPCS add-on code G2211 are met, it may be appropriate to report HCPCS add-on code G2211.” CMS frames this as something practitioners “might consider,” which is to say it is a judgement about whether the practice genuinely functions as the patient’s continuing focal point — not an automatic pass for anyone sharing a tax ID.

Frequently asked questions

Who cannot bill G2211?

Nobody is excluded by specialty or credential. What excludes a claim is: reporting a base code outside the office/outpatient and home/residence families (so emergency, inpatient, observation, nursing facility, critical care and consultations are out); an encounter where the relationship is discrete, routine or time-limited; billing through an FQHC or RHC, where the service is bundled; or reporting G2211 without a base code.

Can nurse practitioners and physician assistants bill G2211?

Yes, where they can bill Medicare for the base E/M visit. Eligibility for the add-on is entirely derivative of eligibility for the base code.

Can specialists bill G2211, or is it a primary care code?

Specialists can. The descriptor’s second limb — ongoing care related to a single, serious condition or a complex condition — exists precisely to cover specialty longitudinal care, and CMS’s own worked examples are specialist ones.

Can a hospitalist bill G2211?

Not on hospital inpatient or observation care codes. If the same practitioner also sees patients in an office setting and bills 99202–99205 or 99211–99215, the add-on is available on those visits under the usual test.

Can an urgent care practitioner bill G2211?

Urgent care encounters are typically billed with office/outpatient E/M codes, so the base code is not the obstacle — the relationship test is. Episodic urgent care is the paradigm case of a discrete, time-limited relationship. Notably, an interested party asked CMS in the CY 2026 rulemaking to create a separate urgent-care complexity add-on crosswalked to G2211; CMS sought comment but did not create one.

Does a new patient qualify?

Yes, in principle. The descriptor expressly covers base codes “new or established,” and CMS’s test includes the intent to take responsibility for ongoing care going forward. A new patient being taken on for continuing care can qualify; a new patient seen once for a discrete problem does not.

Can two practitioners both bill G2211 for the same patient on the same day?

CMS has not prohibited it, and the modifier 25 restriction is expressly limited to the same practitioner. CMS clarified that another practitioner’s same-day service does not put modifier 25 on your claim. Each practitioner must independently satisfy the relationship test for their own encounter.

Sources

• CMS MLN Matters MM13473, How to Use the Office & Outpatient E/M Visit Complexity Add-on Code G2211
• CMS MLN Matters MM13272 and MM13592
• CMS, Frequently Asked Questions About E/M Visit Complexity Add-On HCPCS Code G2211
• CY 2024 PFS final rule, 88 FR 78970–78982
• CY 2026 PFS final rule, 90 FR 49462–49464
• CMS MLN Booklet MLN006764, Evaluation and Management Services (May 2026)