CPT 99454 covers supplying the monitoring device with daily recordings or alert transmissions across a 30-day period. It turns on a day count, and for 2026 there is finally a code for the patients who never reached it.
What CPT 99454 covers
99454 is remote monitoring of physiologic parameter(s), device(s) supply with daily recording(s) or programmed alert(s) transmission, each 30 days.
The threshold is the code. At least 16 days of data must be transmitted within the 30-day period. Fifteen days does not round up, and until 2026 that meant the period was simply unbillable.
Where 99454 sits in the RPM family
99454 is the device supply half: daily recordings or programmed alert transmissions, each 30 days, with at least 16 days of data in the period. A patient whose clinically appropriate monitoring is 2 to 15 days in a 30-day period now falls under 99445, new for 2026, rather than going unbilled. Set-up is 99453; management time is 99457, 99470 and 99458. See the full RPM family, including the 2026 additions, on the CPT 99457 guide.
Rules that apply across the whole family
- The device must meet the FDA definition of a medical device, and the data must be automatically uploaded rather than self-reported by the patient.
- Only one practitioner may report RPM for a given patient in a given period.
- RPM is distinct from remote therapeutic monitoring, which has its own code family, and distinct from cardiac implantable device monitoring under 93294 to 93299.
- Time counted toward management must be documented, and time spent by clinical staff must meet the applicable supervision requirements.
- An order and the patient's consent must be on file before monitoring begins.
Reimbursement context
2026 Medicare RVUs for CPT 99454
| CPT 99454: 2026 Medicare RVUs (national, before GPCI) | ||||||
|---|---|---|---|---|---|---|
| Line | Work | PE, non-facility | PE, facility | Malpractice | Total, non-facility | Total, facility |
| Global (no modifier) | 0.00 | 1.55 | NA | 0.01 | 1.56 | NA |
Source: CMS CY 2026 PFS Relative Value File, RVU26D (October release, published 08/26/2026). RVUs are national and unadjusted; commercial payers set their own rates.
In the 2026 CMS relative value file, CPT 99454 carries 0.00 work RVUs and 1.56 total RVUs. The facility column is NA: CMS values this code only for a non-facility setting such as an office. Its PC/TC indicator is 0: CMS treats it as a physician service, so modifiers 26 and TC do not apply in any setting. Its global indicator is XXX: the surgical global period concept does not apply.
To turn RVUs into payment, each component is multiplied by your locality's geographic practice cost index, the three are added, and the sum is multiplied by the 2026 conversion factor: $33.4009, or $33.5675 for qualifying APM participants (CMS-1832-F; CMS fact sheet). The CMS Physician Fee Schedule Look-Up Tool runs that calculation for your locality.
Documentation requirements
- The order for remote monitoring and the patient's consent, dated before monitoring began.
- The condition being monitored and why remote monitoring is clinically appropriate.
- The device used, and that it meets the medical device definition.
- The number of days data was transmitted in the period, since the day count drives code selection.
- For management codes, the time spent and the date and nature of the interactive communication.
- The clinical decisions made in response to the data.
- A record that no other practitioner is billing RPM for this patient in the period.
Common denials and the exact fix
Fewer than 16 days of data transmitted
Historically the single biggest source of unbillable RPM periods.
Fix: for 2026 dates of service, a period with 2 to 15 days of data is reported with 99445 rather than written off. Below 2 days, neither code applies. Build the day count into the billing trigger so the system picks the right code automatically.
99445 and 99454 both billed for the same period
They describe mutually exclusive day ranges and cannot both apply.
Fix: let the transmitted day count select exactly one of them.
Billed on a calendar month instead of a 30-day period
99454 runs on a 30-day period, which drifts against calendar months. The management codes, by contrast, run on the calendar month.
Fix: track the two clocks separately. Aligning everything to the calendar month is the most common structural error in an RPM programme.
Patient-reported readings billed as device data
The data must upload automatically from a device meeting the FDA definition. Readings the patient types in do not qualify.
Fix: confirm the device transmits automatically before enrolling the patient in RPM billing.
Billed with no device actually supplied
The code pays for the device supply. Where the patient uses their own equipment, the supply code is not supportable.
Fix: restrict the supply code to devices the practice or its vendor provides.
Modifier rules
- 25: on a same-day E/M where a separately identifiable service was provided beyond the monitoring, never on the 99454 line.
- 95 / telehealth modifiers: 99454 is not a telehealth service and does not generally take a telehealth modifier. Check payer instruction rather than assuming.
- 26 / TC: not used. CMS gives 99454 a PC/TC indicator of 0.
- Frequency: 99454 is reported once per 30-day period, so a modifier cannot make a second device-supply line payable in the same period.
NCCI bundling edits
- 99454 with 99445: mutually exclusive for the same 30-day period.
- 99454 with 99453: separately reportable. Supply and set-up are different services.
- 99454 with 99457, 99470 or 99458: separately reportable. Supply and management are different services.
- 99454 with the cardiac device monitoring codes: different family.
- More than one 99454 in a 30-day period is a duplicate.
Frequently asked questions
How many days of data does CPT 99454 require?
What is the difference between 99454 and 99445?
Does 99454 run on a calendar month?
Can patient-reported readings support 99454?
Sources
American Medical Association, CPT 2026 Professional Edition.
Centers for Medicare & Medicaid Services, CY 2026 PFS Relative Value File RVU26D (October release): RVUs, PC/TC indicator and global period for CPT 99454.
Centers for Medicare & Medicaid Services, CY 2026 Physician Fee Schedule final rule, CMS-1832-F: conversion factors.
Centers for Medicare & Medicaid Services, National Correct Coding Initiative Policy Manual for Medicare Services and quarterly procedure-to-procedure edit tables.
CY 2026 PFS final rule, CMS-1832-F: remote physiologic monitoring provisions.
CPT® is a registered trademark of the American Medical Association. Payer policy and NCCI edits change quarterly, so check your own contractor before submission. How we verify this guidance.
Related codes
- CPT 99453. RPM setup and patient education.
- CPT 99457. RPM management, first 20 minutes.
- CPT 99458. RPM management, each added 20 minutes.
More cardiology code guides
- CPT 93784. 24-hour ambulatory blood pressure monitoring.
Related reading
- Cardiology billing & RCM. How we scrub cardiology claims across diagnostics, cath lab, EP and remote monitoring.
- Cardiac RPM billing compliance. Transmission windows, documentation and the rules that trip up remote monitoring claims.
- TC/26 modifier errors in cardiology. The split-billing mistakes that cost diagnostic practices the most.
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