Reviewed November 11, 2026
G2211 is Medicare’s add-on code for the complexity of an office or outpatient E/M visit that comes from a longitudinal relationship: the practitioner is the continuing focal point for all of the patient’s care, or is managing one serious or complex condition over time. The automated claim edit that denies it is modifier 25 on the base visit. For dates of service from 1 January 2027, Medicare’s final rule replaces G2211 with modifier B1 on the E/M line itself (B2 for Shared Savings Program and LEAD ACO practitioners), with the same modifier 25 limit.
The rules below are Medicare’s. Medicare Advantage plans and commercial payers set their own policy on G-codes, and the contract is the only place to check it.
What G2211 is, and since when
CMS finalized separate payment for HCPCS code G2211 in the CY2024 Physician Fee Schedule final rule (2 November 2023), effective 1 January 2024. CMS had first finalized the code in the CY2021 rule, but Congress prohibited the payment before 1 January 2024 (CY2024 fact sheet). MLN Matters MM13473 (revised 1 May 2025) is the operating instruction.
The CMS descriptor: “Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient’s single, serious condition or a complex condition. Add-on code, list separately in addition to home or residence or office/outpatient evaluation and management service, new or established.”
The mechanics, from MM13473 and CMS’s G2211 FAQ:
- It rides on an office or outpatient E/M base code: 99202, 99203, 99204, 99205, 99211, 99212, 99213, 99214 or 99215. Since the CY2026 final rule it also rides on the home or residence E/M codes 99341, 99342, 99344, 99345, 99347, 99348, 99349 and 99350. It cannot be reported alone.
- Any level, new or established patient, any specialty.
- It is paid under the PFS in both facility and non-facility settings. The patient’s Part B coinsurance and deductible apply.
- It cannot be billed with inpatient, emergency department or nursing facility E/M codes. In an RHC or FQHC it is bundled into the encounter rate.
When it applies: the relationship test
MM13473 says to think about the relationship, not the condition. Bill G2211 if you are the continuing focal point for all needed services, like a primary care practitioner, or if you are giving ongoing care for a single serious or complex condition, such as sickle cell disease or HIV.
CMS’s two worked examples make the point. A primary care practitioner sees a patient for sinus congestion; the complexity CMS is paying for is not the sinusitis but “the cognitive load of the continued responsibility of being the focal point for all needed services.” An infectious disease physician managing a patient’s HIV learns of missed doses because the ongoing relationship is why the patient disclosed them. G2211 may be billed in both.
The FAQ lists where it does not apply: care that is “discrete, routine, or time-limited,” such as a mole removal or a referral for one, a simple virus, seasonal-allergy counselling, new-onset reflux, a fracture, or any visit where the billing practitioner has not taken, and does not plan to take, responsibility for the patient’s ongoing care “with consistency and continuity over time.”
Four FAQ answers settle the recurring questions:
- No specific diagnosis is required (Q8), and CMS gives no numeric definition of “longitudinal” (Q9). The test is responsibility over time, not visit frequency.
- Team-based care counts (Q3). If the patient’s ongoing relationship is with a care team inside the group practice and a colleague sees them, G2211 may be appropriate.
- The primary care exception is fine (Q4). Visits billed with the GE modifier can carry G2211 when the criteria are met.
- Care management does not conflict (Q11). G2211 may be billed in the same service period as chronic care management; CMS views the add-on as recognizing work inside the visit and CCM as work outside it. See our step-by-step CCM billing guide.
Documentation: CMS has added no G2211-specific requirement (FAQ Q7). The visit must be medically necessary, and reviewers may use the assessment and plan, the diagnoses and the claims history for that patient-practitioner pair to confirm the relationship; the pattern of visits matters more than a template line.
Why G2211 denies
1. Modifier 25 on the base E/M. Modifier 25 marks a significant, separately identifiable E/M (MM13473). The CY2024 final rule (88 FR 78974, as CMS’s G2211 FAQ summarizes it), implemented through the claim edits in MLN Matters MM13272, denies G2211 when the office E/M on the same date carries modifier 25 for the same patient and practitioner. If a minor procedure forces modifier 25 onto the visit, the add-on will not pay.
The exception, effective 1 January 2025 under CR 13705 and the CY2025 final rule (89 FR 97858): G2211 is payable with a modifier-25 office visit when the other service is an Annual Wellness Visit (G0438 or G0439), a vaccine administration, or a Medicare Part B preventive service on CMS’s allowed list. From 1 January 2026 the same exception applies to the home and residence base codes. Our post on AWV billing with modifier 25 covers the AWV side of that claim.
2. No qualifying base code on the claim. G2211 submitted without an office, outpatient, home or residence E/M, or with an inpatient, ED or nursing facility code, denies outright. RHC and FQHC claims bundle it.
3. The relationship does not fit. A medical-review finding rather than a front-end edit: a one-time visit for a patient the practice will not see again, or a procedural specialist’s single consult, matches CMS’s “discrete, routine, or time-limited” list.
4. The payer is not Medicare. A Medicare Advantage or commercial denial with a “non-covered code” reason is a contract question, not a coding error.
What changes on 1 January 2027: modifier B1
In the CY2027 PFS final rule (CMS fact sheet, 4 November 2026; Federal Register 2026-22743), CMS finalized replacing G2211 with modifier B1, appended to the office/outpatient or home/residence E/M code instead of billed on its own line. CMS says B1 increases the payment of the associated E/M code by 16%, so the uplift scales with the level billed instead of paying the same amount on 99212 and 99215, and that G2211 will no longer be payable once the change takes effect. Modifier B2, at 32%, is available only to practitioners participating in a Shared Savings Program ACO or Participant Providers in a LEAD Model ACO; it is voluntary and billable for all beneficiaries they treat.
The billing rules carry over. B1 is billed in the same circumstances as G2211. It is still not payable when the visit carries modifier 25, except alongside an Annual Wellness Visit, a vaccine administration or another Part B preventive service, including the Initial Preventive Physical Examination. It can be used on office and home visits furnished by telehealth, and not on E/M visits in SNF, RHC, FQHC or CAH settings. If a claim line already needs four modifiers, CMS says to use modifier 99 and list the rest in the claim narrative. Use G2211 for 2026 dates of service and B1 from 1 January. Our 2027 Medicare fee schedule changes page covers the rest of the final rule.
A G2211 check before January
- Pull twelve months of G2211 lines and their denial reasons. Separate modifier-25 denials from everything else.
- On the modifier-25 denials, check whether the other service was an AWV, a vaccine administration or a listed preventive service. Dates of service from 1 January 2025 with one of those fall under the exception and are worth appealing; the rest are not.
- Confirm the charge-entry rule: on a procedure day, choose between the E/M with modifier 25 and G2211 before the claim goes out. From 1 January the same choice applies to B1.
- Fix templates that append G2211 to every established-patient visit. Urgent, one-time and referral-out visits should not carry it.
- Load each Medicare Advantage and commercial plan’s G-code position into the payer rules.
- Build the 1 January switch: G2211 on its own line for 2026 dates of service, B1 (or B2 for eligible ACO practitioners) on the E/M line for 2027 dates, and modifier 99 overflow where four modifier slots are already in use.
More coding references are in our resources library. If G2211 denials are not being worked, our internal medicine billing services team can run the check before the switch to modifier B1.
