QB HCPCS Level II modifier: Prescribed 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…
QB is a HCPCS Level II modifier: “Prescribed 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 oxygen is prescribed.” It adds this detail to the code it is reported with.
Official description
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 oxygen is prescribed
Short description: Avg day/nite o2 > 4 lpm/port
HCPCS · United States
Medicare details
The indicators CMS publishes with QB in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Apr 1, 2018
Where QB sits
- 1GroupHCPCS modifiers
- 2Modifier 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 oxygen is prescribed
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 QB mean?
QB is the HCPCS code for “Prescribed 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 oxygen is prescribed” in CMS’s HCPCS Level II October 2026 release.
Where is QB in the HCPCS Level II list?
QB is listed under Modifiers.
Does Medicare cover QB?
CMS lists QB’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 QB
All modifiersQ5Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a…Q6Service 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)QCSingle channel monitoringQDRecording 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 system