CPT 93784 covers ambulatory blood pressure monitoring worn for 24 hours or longer, reported as the complete service. Coverage for it is narrower than most practices expect, and the denials cluster around the indication rather than around the recording itself.
What CPT 93784 covers
93784 is ambulatory blood pressure monitoring using report-generating software, automated, worn continuously for 24 hours or longer, including the recording, the scanning analysis, and the interpretation and report.
It is the global code. Like the ECG and stress test families, it splits through separate component codes rather than through modifiers:
- 93784: complete service.
- 93786: recording only.
- 93788: scanning analysis with report.
- 93790: review with interpretation and report.
Coverage is the gating question
Medicare covers ambulatory blood pressure monitoring under National Coverage Determination 20.19 for two situations, for dates of service on and after July 2, 2019:
- Suspected white coat hypertension. Elevated office readings (systolic above 130 but below 160, or diastolic above 80 but below 100) on two separate visits with at least two measurements each, alongside at least two out-of-office readings below 130/80.
- Suspected masked hypertension. Borderline office readings (systolic 120 to 129, or diastolic 75 to 79) on two separate visits with at least two measurements each, alongside elevated out-of-office readings.
That makes this a code where the indication decides the claim before anything else does, and the claim needs a diagnosis code consistent with those criteria. Ordering it as a convenience for routine blood pressure follow-up produces predictable denials.
Reimbursement context
93784 carries both the technical and professional value. Where a component was performed by another entity, the component codes rather than the global code apply.
2026 Medicare RVUs for CPT 93784
| CPT 93784: 2026 Medicare RVUs (national, before GPCI) | ||||||
|---|---|---|---|---|---|---|
| Line | Work | PE, non-facility | PE, facility | Malpractice | Total, non-facility | Total, facility |
| Global (no modifier) | 0.37 | 1.03 | NA | 0.03 | 1.43 | 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 93784 carries 0.37 work RVUs and 1.43 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 4: 93784 is a global test-only code. The professional and technical parts are billed with their own codes, not with modifiers 26 or TC. 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 specific indication (suspected white coat or masked hypertension), with the office and out-of-office readings that meet the NCD 20.19 criteria, rather than a general hypertension code.
- Confirmation the device was worn for at least 24 hours, with the actual wear time recorded.
- The number of successful readings obtained, since an inadequate study may not support the code.
- Daytime, night-time and 24-hour averages, and the dipping pattern.
- A signed interpretation with a conclusion answering the clinical question.
- Where components were split, which entity performed each part.
Common denials and the exact fix
CO-50: indication outside the covered criteria
The dominant 93784 denial. Routine hypertension follow-up is outside NCD 20.19.
Fix: confirm the readings meet the NCD 20.19 criteria before the study is ordered, and code the indication specifically.
Repeat study without a documented reason
A second study close behind the first draws scrutiny, and payers may limit how often it is covered.
Fix: check the date of the prior study before ordering, check the payer's policy on repeats, and document the clinical change if a repeat is genuinely needed.
Global code billed when a component was performed elsewhere
Where another entity supplied the device or performed the scanning analysis, the global code overstates the service.
Fix: report the component code matching the work your entity performed.
Wear time under 24 hours
The descriptor requires continuous wear of 24 hours or longer.
Fix: record actual wear time. A study cut short does not support the code, and a repeat needs its own documented reason.
Insufficient successful readings
A study with too few usable readings may not support an interpretation.
Fix: record the number of successful readings and address adequacy in the report.
Modifier rules
- 26 / TC: not used. CMS gives CPT 93784 a PC/TC indicator of 4 (global test only): the recording, the scanning analysis and the interpretation are billed with their own codes, 93786, 93788 and 93790, not with modifiers.
- 59 / XE / XP / XS / XU: only for genuinely distinct services, never as a way past a frequency or bundling edit.
- 76 / 77: repeat study by the same or another physician, with a documented clinical trigger.
- 25: on the E/M where a separately identifiable visit occurred, never on the diagnostic code.
- GA / GY / GZ: where an advance beneficiary notice applies or a service is excluded, per payer instruction.
NCCI bundling edits
- 93784 with 93786, 93788 or 93790: these are components of the global code and are not separately reportable alongside it.
- 93784 with a same-day E/M: report the E/M separately only where a distinct evaluation occurred, with modifier 25 on the E/M.
- 93784 with routine office blood pressure measurement: not separately reportable.
- Any limit on repeat studies is payer policy rather than an NCCI edit.
Frequently asked questions
Why is CPT 93784 denied so often?
What is the difference between 93784 and the component codes?
How long must the monitor be worn?
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 93784.
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.
CMS National Coverage Determination 20.19, Ambulatory Blood Pressure Monitoring (CAG-00067R2).
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 93000. Routine 12-lead ECG, global.
- CPT 99454. RPM device supply, 16 or more days of data.
- CPT 93015. Cardiovascular stress test, global.
Related reading
- Cardiology billing & RCM. How we scrub cardiology claims across diagnostics, cath lab, EP and remote monitoring.
- TC/26 modifier errors in cardiology. The split-billing mistakes that cost diagnostic practices the most.
- Cardiac RPM billing compliance. Transmission windows, documentation and the rules that trip up remote monitoring claims.
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