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A practical guide to CPT code 98979, the 2026 RTM treatment management code for 10–19 minutes, with billing rules, documentation, and reimbursement.
Most RTM management time happens in small increments. A few minutes reviewing patient data on a Tuesday morning. A 7-minute phone call on Thursday. A quick plan adjustment on Friday afternoon. Add it up across a calendar month and you might land at 14 or 16 minutes. That’s real clinical work, but historically not enough to bill. That gap is exactly what CPT code 98979 closes.
CPT code 98979 changes the math. The 2026 RTM update introduced it to cover 10–19 minutes of qualified clinician management time per calendar month. It finally recognizes the shorter management windows that the 20-minute threshold for 98980 left out.
This article walks through the official definition, billing rules, and what counts as interactive communication. It also covers documentation requirements and how 98979 fits alongside the other five RTM codes.
CPT code 98979 covers physician or qualified provider time of 10–19 minutes in a calendar month. It requires at least one real-time interactive communication with the patient or caregiver during that month. This is a treatment management code, not a service or device supply code. It pays for clinician oversight time, not for the platform that captures the data. The activities that count toward management time include data review and interpretation, patient communication, plan of care adjustments, and care coordination tied to RTM.
The pre-2026 RTM structure had a meaningful gap. Clinicians regularly spent 10–19 minutes managing RTM patients in a given month. They reviewed transmitted data, sent a quick message, or adjusted a home program after a phone call. But they couldn’t bill anything, because the lowest management time code (98980) required a full 20 minutes. CPT code 98979 recognizes this shorter-duration treatment management as legitimate, billable clinical work. It’s part of the broader 2026 update that also introduced 98985 for shorter device-supply windows.
The either/or rule is straightforward. Clinics bill 98979 OR 98980 in a given calendar month, never both for the same patient. The threshold split is the determining factor. 10–19 minutes of qualified time means 98979, and 20+ minutes means 98980. 98981 covers each additional 20-minute increment beyond that. Actual logged time determines the choice, not provider preference. Rounding habits create compliance exposure. A clinic that routinely “rounds up” to 20 minutes to bill 98980 overstates time, and the claim won’t hold up under audit.
CMS defines interactive communication as a real-time, synchronous, two-way audio interaction that may include video or other data transmission. This includes in-person time where the team discusses RTM data and the resulting outcomes or modifications. The clinic must clearly document that this time occurred outside of other billable in-clinic therapy services.
The qualifying formats are phone calls, two-way audio-visual communication (video visits, telehealth tools), and in-person discussions. What doesn’t qualify: text messages, emails, and asynchronous platform messages. These aren’t real-time synchronous exchanges, even when the platform logs them as patient communication.
Several activities contribute to total management time: data review and analysis, the interactive communication itself, and time communicating electronically. Plan of care adjustments and coordination of care tied to RTM also count. There’s an important exclusion: time spent on services billed separately the same day cannot count toward 98979. That includes PT/OT/SLP evaluations, therapeutic exercise, gait training, and other treatment services.
The qualified-clinician requirement is equally important. Only time from physicians, PTs, OTs, SLPs, or a qualified assistant equivalent (PTA, OTA, SLPA) counts toward 98979. Front-desk follow-ups and care coordinator messages don’t qualify, even when they look similar to clinician work.
CPT code 98979 is billed based on a calendar month, January 1–31, February 1–28, and so on. This is different from the device supply codes (98985 and 98977), which are billed based on a rolling 30-day period from patient enrollment. The practical implication: a clinic may be able to bill 98979 in a calendar month even when the 30-day data transmission period for a device supply code hasn’t closed yet. The two clocks run in parallel and don’t need to align, which means clinics tracking Remote Therapeutic Monitoring manually have to manage two timelines per patient.
Clinics may bill CPT code 98979 once per calendar month. Two conditions apply: the patient must hit the 10-minute floor, and at least one qualifying interactive communication must occur during that month. Clinics can’t bill it twice in the same month for the same patient, and the time can’t roll forward.
Within a billing cycle, 98979 stacks naturally with 98975 (initial setup, once per episode of care). It also stacks with the device supply codes (98985 or 98977, based on monitored days). CMS does not allow concurrent RTM services from two different disciplines for the same patient in the same month. That covers combinations like OT and PT, or MD and PT.
Medicare recognizes CPT code 98979 for physicians, physical therapists, occupational therapists, speech-language pathologists, and their equivalent assistants (PTAs, OTAs, SLPAs). The 2024 CMS Final Rule clarified that PTs and OTs in private practice can provide general supervision for RTM services their PTAs and OTAs furnish.
Any licensed practitioner on the clinical team can contribute time toward the treatment management total for 98979, 98980, and 98981. If a PTA or OTA accounts for more than 10 percent of that time, the de minimis standard applies. The clinic must bill the claim with the appropriate assistant modifier: CQ for a PTA, CO for an OTA.
A few coverage realities are worth noting. Medicare doesn’t currently cover chiropractors for RTM. SLP-billed RTM has been inconsistent under Medicare in practice. And some commercial payers may have specific documentation or supervision requirements beyond CMS standards. Verify coverage per payer before billing.
Two different disciplines cannot bill RTM codes for the same patient within the same episode of care. If the OT bills 98979, the PT or SLP cannot bill 98979 for that same patient. That holds even when all three are actively involved in care.
This matters most in multidisciplinary cases where care crosses disciplines. Stroke recovery often involves physical therapy, occupational therapy, and speech therapy simultaneously. Post-TBI rehab and many pediatric cases follow the same pattern. In each scenario, the team has to decide upfront which discipline owns RTM enrollment and management for the patient. That decision needs to hold for the duration of the episode.
A PT evaluates a patient on January 27 and sets up RTM monitoring through the platform. The PT also provides patient education on how to record exercise completion and pain self-assessment. Over the next four days (January 27–31), the PT spends 9 minutes 11 seconds reviewing transmitted data. The PT also spends 6 minutes on a phone call with the patient to adjust the home exercise program. Total management time for January: 15 minutes 11 seconds, with one qualifying interactive communication (the phone call). The PT bills CPT code 98979 for January.
In February, the same patient generates 22 minutes of management time. The PT reviews data twice, has another phone call, and adjusts the program after a flare-up. Because the time exceeded 20 minutes, the PT bills 98980 for February instead. The same patient moved between 98979 and 98980 across two consecutive months based on actual logged time.
Audit-ready 98979 documentation needs to capture: the date and exact time (minutes and seconds) of each data review and analysis activity, the date and exact time of each interactive communication along with what was discussed, any changes to the RTM program or plan of care resulting from review or communication, and confirmation that total time for the calendar month falls within 10–19 minutes.
Time should be logged as activities happen, not reconstructed at month-end. Reconstructed time logs are one of the highest audit-risk patterns in RTM billing, rounded numbers, identical entries across patients, and vague descriptions all surface as red flags. The same documentation that supports 98979 billing also protects the clinic if claims are reviewed later.
A few predictable errors show up consistently: counting time toward 98979 from services already billed separately the same day (therapeutic exercise, gait training, evaluations), mixing front-desk or care coordinator time with clinician review time, missing the interactive communication requirement, or billing 98979 when total time actually reached 20+ minutes (should be 98980).
Texting or emailing a patient is often miscounted as an interactive communication, it doesn’t qualify under CMS guidance, however this time can be attributed within the monitoring and management time. The most common edge case is rounding: clinics that round time to the nearest 5 minutes lose the granularity that distinguishes 98979 from 98980.
The 2026 RTM code set has six codes that work as a system: 98975 (initial setup, once per episode), 98985 (device supply for 2–15 monitored days), 98977 (device supply for 16+ monitored days), 98979 (10–19 minutes of management time), 98980 (20 minutes of management time), and 98981 (each additional 20 minutes beyond 98980). For a code-by-code walkthrough of each one, the 2026 RTM CPT code overview has the full picture.
A sample billing scenario shows how the codes layer: a patient generates 18 days of monitored data and 16 minutes of management time in January (their first month). The billing: 98975 (setup, after the 2-day floor is met) + 98977 (16+ day device supply) + 98979 (10–19 minutes of treatment management time). Setup happens once per episode, one device supply code per 30-day period, one management time code per calendar month.
Wibbi logs clinician time against the 10–19 minute (98979) and 20+ minute (98980) thresholds in real time as activities happen, distinguishing qualified clinician time from administrative time so the totals reflect what can actually be billed. The platform captures interactive communications and generates audit-ready documentation showing time, activity, and patient context, surfacing the correct code when each threshold is met. The same time-tracking logic runs whether the program is being delivered by a physical therapy, occupational therapy, speech therapy, pediatric, chiropractic, or pelvic health team.
Bill 98979 when monthly qualified clinician management time falls between 10 and 19 minutes and at least one qualifying interactive communication occurred during the calendar month. Once time crosses 20 minutes, 98980 applies instead, with 98981 layered on for each additional 20-minute increment beyond that.
The denial triggers come down to a short list: fewer than 10 minutes logged, no qualifying interactive communication, dual billing with 98980 in the same month, time counted from services already billed separately, or RTM billed by more than one discipline for the same patient in the same episode of care.
National average reimbursement for 98979 in 2026 is $26.07, with actual payment shaped by Medicare locality.
This article is provided for informational purposes and isn’t intended as billing or legal advice, verify the latest CMS guidance and consult your billing team before submitting claims.
