QC HCPCS Level II modifier: Single channel monitoring
QC is a HCPCS Level II modifier: “Single channel monitoring.” It adds this detail to the code it is reported with.
Official description
QCSingle channel monitoring
HCPCS · United States
Medicare details
The indicators CMS publishes with QC in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Jan 1, 1989
Where QC sits
- 1GroupHCPCS modifiers
- 2Modifier QCSingle channel monitoring
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code QC mean?
QC is the HCPCS code for “Single channel monitoring” in CMS’s HCPCS Level II October 2026 release.
Where is QC in the HCPCS Level II list?
QC is listed under Modifiers.
Does Medicare cover QC?
CMS lists QC’s Medicare coverage as “Carrier judgment”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside QC
All modifiersQ6Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in…Q7One class a findingQ8Two class b findingsQ9One class b and two class c findingsQAPrescribed amounts of stationary oxygen for daytime use while at rest and nighttime use differ and the average of the two amounts is less than 1 liter per minute (lpm)QBPrescribed amounts of stationary oxygen for daytime use while at rest and nighttime use differ and the average of the two amounts exceeds 4 liters per minute (lpm) and portable…QDRecording and storage in solid state memory by a digital recorderQEPrescribed amount of stationary oxygen while at rest is less than 1 liter per minute (lpm)QFPrescribed amount of stationary oxygen while at rest exceeds 4 liters per minute (lpm) and portable oxygen is prescribedQGPrescribed amount of stationary oxygen while at rest is greater than 4 liters per minute (lpm)QHOxygen conserving device is being used with an oxygen delivery systemQJServices/items provided to a prisoner or patient in state or local custody, however the state or local government, as applicable, meets the requirements in 42 cfr 411.4 (b)