HCPCS Level II modifier
Modifier QN
Modifier QN is a HCPCS Level II modifier. CMS describes it as: Ambulance service furnished directly by a provider of services.
Source: CMS HCPCS Level II, October 2026 file dated September 23, 2026. Publisher page
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- Modifier
- QN
- Type
- HCPCS Level II modifier, maintained by CMS
- CMS description
- Ambulance service furnished directly by a provider of services
- 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
- 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.
- QMAmbulance service provided under arrangement by a provider of services
- QQOrdering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional
- QLPatient pronounced dead after ambulance called
- 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)
- QKMedical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals
- QSMonitored anesthesia care service
- QJServices/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)
Related pages
Questions
What does modifier QN mean?
Modifier QN is a HCPCS Level II modifier. CMS describes it as: Ambulance service furnished directly by a provider of services.
Is modifier QN a CPT or a HCPCS modifier?
QN 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 QN 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.