C1833 — Monitor, cardiac, including intracardiac lead and all system components (implantable)
C1833 is a HCPCS Level II code for monitor, cardiac, including intracardiac lead and all system components (implantable). It belongs to the Outpatient Prospective Payment System section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Medically Unlikely Edits — units per day
The most units of C1833 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 1 unit MAI 2 — Date of Service Edit: Policy · Code Descriptor / CPT Instruction
- outpatient
- 1 unit MAI 2 — Date of Service Edit: Policy · Code Descriptor / CPT Instruction
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for C1833
- Long descriptor
- Monitor, cardiac, including intracardiac lead and all system components (implantable)
- Short descriptor
- Cardiac monitor sys
- Added
- January 1, 2022
- BETOS
- D1A
- Pricing indicator
- 53 — Other
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Statute.
Codes adjacent to C1833
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If C1833 is not quite right, the correct code is very often within a few positions of it.
- C1823Generator, neurostimulator (implantable), non-rechargeable, with transvenous sensing and stimulation leads
- C1824Generator, cardiac contractility modulation (implantable)
- C1825Generator, neurostimulator (implantable), non-rechargeable with carotid sinus baroreceptor stimulation lead(s)
- C1826Generator, neurostimulator (implantable), includes closed feedback loop leads and all implantable components, with rechargeable battery and charging system
- C1827Generator, neurostimulator (implantable), non-rechargeable, with implantable stimulation lead and external paired stimulation controller
- C1830Powered bone marrow biopsy needle
- C1831Interbody cage, anterior, lateral or posterior, personalized (implantable)
- C1832Autograft suspension, including cell processing and application, and all system components
- C1834Pressure sensor system, includes all components (e.g., introducer, sensor), intramuscular (implantable), excludes mobile (wireless) software applicationterminated
- C1839Iris prosthesis
- C1840Lens, intraocular (telescopic)
- C1841Retinal prosthesis, includes all internal and external componentsterminated
- C1842Retinal prosthesis, includes all internal and external components; add-on to c1841terminated
- C1849Skin substitute, synthetic, resorbable, per square centimeterterminated
- C1874Stent, coated/covered, with delivery system
- C1875Stent, coated/covered, without delivery system
Questions about C1833
What is HCPCS code C1833?
C1833 is a HCPCS Level II code for monitor, cardiac, including intracardiac lead and all system components (implantable). It sits in the Outpatient Prospective Payment System section.
Does Medicare cover C1833?
The CMS HCPCS file marks C1833 as "Special coverage instructions apply". There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.