To assist in identifying the prescribed flow rate on the claim form, and to ensure appropriate use of modifiers in all cases based on the prescribed flow rate at rest (or at night or based on the average of the rate at rest and at night if applicable) in accordance with Federal regulations, the following three new pricing modifiers are added to the HCPCS file effective April 1, 2018:

1. QA – Prescribed 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)

2. QB – Prescribed amounts of stationary oxygen for daytime used 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

3. QR – Prescribed amounts of stationary oxygen for daytime use while at rest and nighttime use differ and the average of the two amounts is greater than 4 liters per minute (LPM)

Additionally, the existing QE, QF, and QG modifiers are revised to clarify that the prescribed flow rate at rest is used in accordance with regulations at 42 CFR 414.226(e)(3). This section instructs that if the prescribed flow rate is different for the patient at rest than for the patient at exercise, the flow rate for the patient at rest is used.

Effective April 1, 2018, these modifiers are revised to read:

1. QE – Prescribed amount of stationary oxygen while at rest is less than 1 liter per minute (LPM)

2. QF – Prescribed amount of stationary oxygen while at rest exceeds 4 liters per minute (LPM) and portable oxygen is prescribed

3. QG – Prescribed amount of stationary oxygen while at rest is greater than 4 liters per minute (LPM)

For more information: https://www.cms.gov/Outreach-and-Education/Medicare-Learning-Network-MLN/MLNMattersArticles/Downloads/MM10158.pdf