HCPCS Level II modifier
Modifier QQ
Modifier QQ is a HCPCS Level II modifier. CMS describes it as: Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional.
Source: CMS HCPCS Level II, October 2026 file dated September 23, 2026. Publisher page
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- Modifier
- Type
- HCPCS Level II modifier, maintained by CMS
- CMS description
- Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional
- Claim form
- CMS-1500 item 24D, up to four modifiers per line. 837P SV101-3 to SV101-6.
- Guidance
- CMS HCPCS quarterly update
Related modifiers
- QRPrescribed 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)
- QPDocumentation 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.
- QSMonitored anesthesia care service
- QNAmbulance service furnished directly by a provider of services
- QTRecording and storage on tape by an analog tape recorder
- QMAmbulance service provided under arrangement by a provider of services
- QWCLIA waived test
- QLPatient pronounced dead after ambulance called
Related pages
Questions
What does modifier QQ mean?
Modifier QQ is a HCPCS Level II modifier. CMS describes it as: Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional.
Is modifier QQ a CPT or a HCPCS modifier?
QQ is a HCPCS Level II modifier from the CMS quarterly HCPCS file. Two-digit numeric modifiers, such as 25 or 59, are CPT modifiers.
Where does modifier QQ go on a claim?
On the CMS-1500 it goes in item 24D next to the procedure code. Each line holds up to four modifiers. On an 837P it goes in SV101-3 to SV101-6.
What denial comes back when a modifier is wrong?
A missing or mismatched modifier often comes back as CARC 4. A modifier that was not valid on the date of service comes back as CARC 182. A bundling edit the modifier should have bypassed comes back as CARC 97 or 236.