HCPCS Code G2251: Virtual Check-In for Non-E/M Providers

G2251 HCPCS code is a Medicare-defined communication technology-based service (CTBS) used for billing 5–10 minute virtual check-ins by non–evaluation and management (E/M) providers such as physical therapists, occupational therapists, and speech-language pathologists.

The offical CMS descriptor of G2251 is: “Brief communication technology-based service, e.g. virtual check-in, by a qualified health care professional who cannot report evaluation and management services, provided to an established patient, not originating from a related service provided within the previous 7 days nor leading to a service or procedure within the next 24 hours or soonest available appointment; 5-10 minutes of clinical discussion.”

Centers for Medicare & Medicaid Services (CMS) introduced G2251 in 2021 to give non-E/M providers a way to bill for brief remote interactions that previously had no reimbursement pathway. It sits under CTBS, which is separate from traditional telehealth and follows different billing rules.

G2251 enables real-time clinical communication via phone, video, or secure messaging between a provider and an established patient to assess symptoms and determine the need for further care.

This short-duration virtual check-in billing code under CMS rules applies only to patient-initiated interactions, excludes full telehealth visits, and requires compliance with time limits, consent documentation, and 7-day/24-hour service restrictions.

This guide covers G2251 billing requirements, eligibility criteria, code comparisons (G2250, G2252, CPT 98016), documentation workflows, reimbursement details, common billing mistakes, and real-world use cases for compliant Medicare billing. 

How Does G2251 Differ From G2250, G2252, and CPT 98016?

G2251 covers synchronous virtual check-ins by non-E/M providers. G2250 covers asynchronous image or video review by those same providers. 

G2252 covers longer virtual check-ins by physicians and qualified healthcare professionals who can report E/M services.  CPT 98016 covers the same service type and duration as the older G2012 code it replaced, but for E/M-eligible providers only. 

Here’s the comparison laid out side by side:

The most common confusion happens between G2251 and CPT 98016. Both cover 5-to-10-minute check-ins. The deciding factor is whether the billing provider can report E/M services. If they can (physicians, NPs, PAs), use 98016. If they cannot (PTs, OTs, SLPs), use G2251.

Who Is Eligible to Bill G2251?

G2251 is designed for therapy-type clinicians who cannot independently bill E/M services under Medicare.

• Physical Therapists (PTs): Can bill G2251 in both private practice and facility settings. CMS made this permanent starting January 1, 2021.
• Occupational Therapists (OTs): Included under the same “sometimes therapy” category and allowed to bill under the same conditions as PTs.
• Speech-Language Pathologists (SLPs): Eligible across practice settings when delivering qualifying virtual check-ins.
• Practice Setting Flexibility: Applies to both private practice and facility-based providers, provided all service requirements are met.
• Established Patient Requirement: The patient must already have an existing relationship with the provider. New patients are not eligible.

Who Cannot Bill G2251 (or Has Restrictions)?

Providers who can bill E/M services or do not meet Medicare criteria must use alternative codes or cannot bill at all.

• Physicians, Nurse Practitioners (NPs), Physician Assistants (PAs):  Cannot use G2251. They bill E/M-based virtual check-ins instead, such as CPT 98016 or G2252.
• Registered Nurses (RNs) and Medical Assistants (MAs): Cannot bill independently. Services must be performed directly by the qualified provider, not delegated to staff.
• Behavioral Health Providers (Conditional)
  • Clinical psychologists and clinical social workers typically bill E/M-based codes (G2252 or 98016).
  • Licensed professional counselors and marriage & family therapists must verify payer-specific policies.
• Audiologists: Explicitly excluded by CMS because CTBS codes fall outside the audiology diagnostic benefit category.
• Services Without Direct Provider Involvement: Any interaction handled only by staff (e.g., relayed messages) does not qualify for G2251 billing.

What Are the Billing Requirements and Rules for G2251?

Five conditions must be met for a G2251 claim to be valid: the patient must be established, the check-in must not follow a related service within 7 days, it must not lead to a service within 24 hours, the patient must consent, and the discussion must last between 5 and 10 minutes.

Why Is G2251 Not Considered a Telehealth Service?

CMS classifies G2251 as a “communication technology-based service” (CTBS), not a telehealth service. This is a deliberate regulatory distinction, and it affects how claims are submitted, which modifiers are used, and which geographic restrictions apply.

Telehealth services under Medicare have historically required the patient to be located at an approved originating site, often in a rural area, receiving care through real-time audio and video from a distant-site provider.

While many of these restrictions were relaxed during the PHE and extended through subsequent legislation, the underlying regulatory framework still treats telehealth as a separate service category with its own rules.

CTBS codes like G2251 sit outside that framework. They are not on the Medicare Telehealth Services List. They do not require POS 02 (telehealth, patient at non-home location) or POS 10 (telehealth, patient at home). Instead, G2251 is billed with POS 11 (office), because CMS views the service as originating from the provider’s practice, not from a telehealth encounter.

This distinction has practical benefits. Because G2251 is not classified as telehealth, there are no geographic restrictions on the patient’s location. A patient in a suburban area, an urban apartment, or a rural farmhouse can all receive a G2251 service. There are no originating-site requirements. There is no need for Modifier 95 (synchronous telehealth) or Modifier GT (interactive audio-video telecommunications).

For billing staff, the practical takeaway is this: do not submit G2251 claims with telehealth POS codes or telehealth modifiers. Doing so can trigger denials. Bill it as a standard office-based service with POS 11.

What Is the Reimbursement Rate for G2251?

The Medicare national payment amount for G2251 in 2026 is $14.03 (facility) and $10.69 (non-facility), according to the Medicare Physician Fee Schedule.

G2251 remains carrier-priced, meaning each Medicare Administrative Contractor sets the final allowed amount for its jurisdiction.

Actual reimbursement can vary slightly based on geographic practice cost index adjustments and local pricing decisions. In practice, most payments stay close to these benchmarks, but small regional differences are expected.

Common Billing Mistakes With G2251 and How to Avoid Them

The most frequent G2251 billing errors result in denials that are easy to prevent. Here are the four mistakes that come up most often.

• Billing for interactions shorter than 5 minutes: If the clinical discussion lasts 4 minutes, G2251 does not apply. CMS set the floor at 5 minutes, and there is no rounding up. Some practices fall into this trap when a patient calls with a quick question that gets resolved fast. If the call runs short, the provider cannot bill G2251. The solution: document the exact time spent. If the call comes in under 5 minutes, do not submit the claim.
• Ignoring the 7-day lookback rule: A provider sees a patient on Tuesday for a shoulder evaluation. The patient calls the following Monday (6 days later) about the same shoulder. That call cannot be billed as G2251 because the 7-day window has not passed. Practices that rely on memory instead of automated scheduling checks make this mistake repeatedly. EHR systems with built-in eligibility flags can catch this before the claim goes out.
• Failing to document patient consent: CMS requires verbal consent and a note in the medical record that consent was obtained. Forgetting to record consent does not automatically trigger a denial at the claims level, but it creates audit risk. If a MAC or payer audits the claim and finds no consent documentation, the payment can be recouped. Build a standard consent note into your EHR template for virtual check-ins.
• Confusing G2251 with a telehealth E/M visit: This mistake takes two forms. First, practice bill G2251 when the interaction was actually a full telehealth evaluation, which should be billed with standard E/M codes. Second, practices submit G2251 with telehealth modifiers (95, GT) or telehealth POS codes (02, 10), which causes denials. G2251 is not telehealth. Bill it with POS 11 and no telehealth modifiers.
• A less obvious error: billing G2251 when the check-in results in an appointment within 24 hours. Practices sometimes submit the claim before the patient schedules a follow-up. If the patient calls back the next day and books a visit, the G2251 claim becomes invalid retroactively. Billing staff should hold G2251 claims for at least 24 hours after the check-in to confirm no resulting service was scheduled.

How to Maximize Reimbursement With Virtual Check-Ins

G2251 pays modestly per encounter, but consistent capture adds up over a month, especially in therapy practices with high patient volumes.

• Documentation: Include four elements in every note: patient-initiated reason, clinical discussion and recommendations, exact time spent, and confirmation that no related visit occurred within 24 hours. Use an EHR template to avoid missing details and reduce denials.
• Workflow: Missed charges are the biggest issue. Add a CTBS screening step to inbound calls. Front desk flags eligible calls, and providers document and bill accordingly.
• RTM Integration: G2251 can complement RTM codes (98975–98981). If patient data triggers a call, it may qualify, but don’t bill overlapping services on the same day.
• Denial Tracking: Review monthly claim data. If a payer consistently denies G2251, stop submitting to them and shift to eligible billing options.

3 Use Cases for G2251

1. Post-surgical follow-up: symptom check via phone: A physical therapist performed a post-operative knee rehabilitation session on a patient 10 days ago. The patient calls the clinic with concerns about increased swelling after a home exercise session. The PT takes the call, spends 7 minutes discussing the symptoms, recommends RICE protocol adjustments, and determines no in-person visit is needed immediately. The PT documents the call, records verbal consent, logs 7 minutes of clinical discussion, and the practice bills G2251 with modifier GP. The claim processes without issue because the last related service was more than 7 days ago, and no follow-up visit was scheduled within 24 hours.
2. Chronic condition monitoring: medication or pain management check-in: An SLP working with a patient on dysphagia management receives a portal message from the patient reporting difficulty swallowing a new food texture. The SLP calls the patient, spends 6 minutes discussing the situation, advises modifications to the current swallowing plan, and documents the interaction. Because the patient’s last SLP session was 12 days prior and no visit was scheduled afterward, the practice bills G2251 with modifier GN.
3. Physical therapy: remote progress assessment between visits: An OT is managing a patient recovering from a wrist fracture. The patient calls midway through the treatment plan, 9 days after the last session, to report that a home exercise is causing sharp pain. The OT spends 8 minutes on the phone, modifies two exercises, and instructs the patient to continue the revised program. No office visit is needed. The practice bills G2251 with the modifier GO. The claim pays because it met every requirement: established patient, patient-initiated contact, clinical discussion within the time range, no related service in the lookback window, and no resulting appointment.

All three scenarios follow the same pattern: patient reaches out, provider addresses the concern within 5-10 minutes, no visit follows within 24 hours, and the interaction gets documented and coded.

Final Words

G2251 fills a narrow but practical gap in Medicare billing for non-E/M providers. It pays for the brief phone calls and portal check-ins that PTs, OTs, and SLPs were doing for free before 2021. The reimbursement per claim is modest, but practices that build virtual check-in capture into their daily workflow can recover thousands of dollars annually in previously unbilled services.

The rules are specific: established patients only, 5-10 minutes of clinical discussion, patient-initiated, no related service within 7 days, no resulting visit within 24 hours, verbal consent documented. Stay within those boundaries, and the code works cleanly.