HCPCS 'Q' Modifiers (29)

Modifier Description
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
Q2 Demonstration procedure/service
Q3 Live kidney donor surgery and related services
Q4 Service for ordering/referring physician qualifies as a service exemption
Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
Q7 One class a finding
Q8 Two class b findings
Q9 One class b and two class c findings
QC Single channel monitoring
QD Recording and storage in solid state memory by a digital recorder
QE Prescribed amount of oxygen is less than 1 liter per minute (lpm)
QF Prescribed amount of oxygen exceeds 4 liters per minute (lpm) and portable oxygen is prescribed
QG Prescribed amount of oxygen is greater than 4 liters per minute(lpm)
QH Oxygen conserving device is being used with an oxygen delivery system
QJ Services/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)
QK Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals
QL Patient pronounced dead after ambulance called
QM Ambulance service provided under arrangement by a provider of services
QN Ambulance service furnished directly by a provider of services
QP Documentation is on file showing that the laboratory test(s) was ordered individually or ordered as a cpt-recognized panel other than automated profile codes 80002-80019, g0058, g0059, and g0060.
QQ Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional
QS Monitored anesthesia care service
QT Recording and storage on tape by an analog tape recorder
QW Clia waived test
QX Crna service: with medical direction by a physician
QY Medical direction of one certified registered nurse anesthetist (crna) by an anesthesiologist
QZ Crna service: without medical direction by a physician