Modifiers: HCPCS modifiers
Two-character modifiers that add detail to a code: the side of the body, the circumstances of a service, or payer requirements.
Active HCPCS modifiers
Each opens its own page with CMS’s full descriptor, Medicare indicators and dates.
A1Dressing for one woundA2Dressing for two woundsA3Dressing for three woundsA4Dressing for four woundsA5Dressing for five woundsA6Dressing for six woundsA7Dressing for seven woundsA8Dressing for eight woundsA9Dressing for nine or more woundsAAAnesthesia services performed personally by anesthesiologistABAudiology service furnished personally by an audiologist without a physician/npp order…ACInitial onboarding support payment for access beneficiary enrollment, device/app setup…ADMedical supervision by a physician: more than four concurrent anesthesia proceduresAERegistered dieticianAFSpecialty physicianAGPrimary physicianAHClinical psychologistAIPrincipal physician of recordAJClinical social workerAKNon participating physicianAMPhysician, team member serviceAOAlternate payment method declined by provider of serviceAPDetermination of refractive state was not performed in the course of diagnostic…AQPhysician providing a service in an unlisted health professional shortage area (hpsa)ARPhysician provider services in a physician scarcity areaASPhysician assistant, nurse practitioner, or clinical nurse specialist services for…ATAcute treatment (this modifier should be used when reporting service 98940, 98941, 98942)AUItem furnished in conjunction with a urological, ostomy, or tracheostomy supplyAVItem furnished in conjunction with a prosthetic device, prosthetic or orthoticAWItem furnished in conjunction with a surgical dressingAXItem furnished in conjunction with dialysis servicesAYItem or service furnished to an esrd patient that is not for the treatment of esrdAZPhysician providing a service in a dental health professional shortage area for the…BAItem furnished in conjunction with parenteral enteral nutrition (pen) servicesBLSpecial acquisition of blood and blood productsBOOrally administered nutrition, not by feeding tubeBPThe beneficiary has been informed of the purchase and rental options and has elected to…BRThe beneficiary has been informed of the purchase and rental options and has elected to…BUThe beneficiary has been informed of the purchase and rental options and after 30 days…CAProcedure payable only in the inpatient setting when performed emergently on an…CBService ordered by a renal dialysis facility (rdf) physician as part of the esrd…CCProcedure code change (use 'cc' when the procedure code submitted was changed either for…CDAmcc test has been ordered by an esrd facility or mcp physician that is part of the…CEAmcc test has been ordered by an esrd facility or mcp physician that is a composite rate…CFAmcc test has been ordered by an esrd facility or mcp physician that is not part of the…CGPolicy criteria appliedCH0 percent impaired, limited or restrictedCIAt least 1 percent but less than 20 percent impaired, limited or restrictedCJAt least 20 percent but less than 40 percent impaired, limited or restrictedCKAt least 40 percent but less than 60 percent impaired, limited or restrictedCLAt least 60 percent but less than 80 percent impaired, limited or restrictedCMAt least 80 percent but less than 100 percent impaired, limited or restrictedCN100 percent impaired, limited or restrictedCOOutpatient occupational therapy services furnished in whole or in part by an…CQOutpatient physical therapy services furnished in whole or in part by a physical…CRCatastrophe/disaster relatedCSCost-sharing waived for specified covid-19 testing-related services that result in and…CTComputed tomography services furnished using equipment that does not meet each of the…DAOral health assessment by a licensed health professional other than a dentistE1Upper left, eyelidE2Lower left, eyelidE3Upper right, eyelidE4Lower right, eyelidEAErythropoietic stimulating agent (esa) administered to treat anemia due to anti-cancer…EBErythropoietic stimulating agent (esa) administered to treat anemia due to anti-cancer…ECErythropoietic stimulating agent (esa) administered to treat anemia not due to…EDHematocrit level has exceeded 39% (or hemoglobin level has exceeded 13.0 g/dl) for 3 or…EEHematocrit level has not exceeded 39% (or hemoglobin level has not exceeded 13.0 g/dl)…EJSubsequent claims for a defined course of therapy, e.g., epo, sodium hyaluronate…EMEmergency reserve supply (for esrd benefit only)EPService provided as part of medicaid early periodic screening diagnosis and treatment…ERItems and services furnished by a provider-based, off-campus emergency departmentETEmergency servicesEXExpatriate beneficiaryEYNo physician or other licensed health care provider order for this item or serviceF1Left hand, second digitF2Left hand, third digitF3Left hand, fourth digitF4Left hand, fifth digitF5Right hand, thumbF6Right hand, second digitF7Right hand, third digitF8Right hand, fourth digitF9Right hand, fifth digitFALeft hand, thumbFBItem provided without cost to provider, supplier or practitioner, or full credit…FCPartial credit received for replaced deviceFPService provided as part of family planning programFQThe service was furnished using audio-only communication technologyFRThe supervising practitioner was present through two-way, audio/video communication…FSSplit (or shared) evaluation and management visitFTUnrelated evaluation and management (e/m) visit on the same day as another e/m visit or…FXX-ray taken using filmFYX-ray taken using computed radiography technology/cassette-based imagingG0Telehealth services for diagnosis, evaluation, or treatment, of symptoms of an acute…G1Most recent urr reading of less than 60G2Most recent urr reading of 60 to 64.9G3Most recent urr reading of 65 to 69.9G4Most recent urr reading of 70 to 74.9G5Most recent urr reading of 75 or greaterG6Esrd patient for whom less than six dialysis sessions have been provided in a monthG7Pregnancy resulted from rape or incest or pregnancy certified by physician as life…G8Monitored anesthesia care (mac) for deep complex, complicated, or markedly invasive…G9Monitored anesthesia care for patient who has history of severe cardio-pulmonary conditionGAWaiver of liability statement issued as required by payer policy, individual caseGBClaim being re-submitted for payment because it is no longer covered under a global…GCThis service has been performed in part by a resident under the direction of a teaching…GEThis service has been performed by a resident without the presence of a teaching…GFNon-physician (e.g. nurse practitioner (np), certified registered nurse anesthetist…GGPerformance and payment of a screening mammogram and diagnostic mammogram on the same…GHDiagnostic mammogram converted from screening mammogram on same dayGJ"opt out" physician or practitioner emergency or urgent serviceGKReasonable and necessary item/service associated with a ga or gz modifierGLMedically unnecessary upgrade provided instead of non-upgraded item, no charge, no…GMMultiple patients on one ambulance tripGNServices delivered under an outpatient speech language pathology plan of careGOServices delivered under an outpatient occupational therapy plan of careGPServices delivered under an outpatient physical therapy plan of careGQVia asynchronous telecommunications systemGRThis service was performed in whole or in part by a resident in a department of veterans…GSDosage of erythropoietin stimulating agent has been reduced and maintained in response…GTVia interactive audio and video telecommunication systemsGUWaiver of liability statement issued as required by payer policy, routine noticeGVAttending physician not employed or paid under arrangement by the patient's hospice…GWService not related to the hospice patient's terminal conditionGXNotice of liability issued, voluntary under payer policyGYItem or service statutorily excluded, does not meet the definition of any medicare…GZItem or service expected to be denied as not reasonable and necessaryH9Court-orderedHAChild/adolescent programHBAdult program, non geriatricHCAdult program, geriatricHDPregnant/parenting women's programHEMental health programHFSubstance abuse programHGOpioid addiction treatment programHHIntegrated mental health/substance abuse programHIIntegrated mental health and intellectual disability/developmental disabilities programHJEmployee assistance programHKSpecialized mental health programs for high-risk populationsHLInternHMLess than bachelor degree levelHNBachelors degree levelHOMasters degree levelHPDoctoral levelHQGroup settingHRFamily/couple with client presentHSFamily/couple without client presentHTMulti-disciplinary teamHUFunded by child welfare agencyHVFunded state addictions agencyHWFunded by state mental health agencyHXFunded by county/local agencyHYFunded by juvenile justice agencyHZFunded by criminal justice agencyJ1Competitive acquisition program no-pay submission for a prescription numberJ2Competitive acquisition program, restocking of emergency drugs after emergency…J3Competitive acquisition program (cap), drug not available through cap as written…J4Dmepos item subject to dmepos competitive bidding program that is furnished by a…J5Off-the-shelf orthotic subject to dmepos competitive bidding program that is furnished…JAAdministered intravenouslyJBAdministered subcutaneouslyJCSkin substitute used as a graftJDSkin substitute not used as a graftJEAdministered via dialysateJKOne month supply or less of drug or biologicalJLThree month supply of drug or biologicalJWDrug amount discarded/not administered to any patientJZZero drug amount discarded/not administered to any patientK0Lower extremity prosthesis functional level 0 - does not have the ability or potential…K1Lower extremity prosthesis functional level 1 - has the ability or potential to use a…K2Lower extremity prosthesis functional level 2 - has the ability or potential for…K3Lower extremity prosthesis functional level 3 - has the ability or potential for…K4Lower extremity prosthesis functional level 4 - has the ability or potential for…KAAdd on option/accessory for wheelchairKBBeneficiary requested upgrade for abn, more than 4 modifiers identified on claimKCReplacement of special power wheelchair interfaceKDDrug or biological infused through dmeKEBid under round one of the dmepos competitive bidding program for use with…KFItem designated by fda as class iii deviceKGDmepos item subject to dmepos competitive bidding program number 1KHDmepos item, initial claim, purchase or first month rentalKIDmepos item, second or third month rentalKJDmepos item, parenteral enteral nutrition (pen) pump or capped rental, months four to…KKDmepos item subject to dmepos competitive bidding program number 2KLDmepos item delivered via mailKMReplacement of facial prosthesis including new impression/moulageKNReplacement of facial prosthesis using previous master modelKOSingle drug unit dose formulationKPFirst drug of a multiple drug unit dose formulationKQSecond or subsequent drug of a multiple drug unit dose formulationKRRental item, billing for partial monthKSGlucose monitor supply for diabetic beneficiary not treated with insulinKTBeneficiary resides in a competitive bidding area and travels outside that competitive…KUDmepos item subject to dmepos competitive bidding program number 3KVDmepos item subject to dmepos competitive bidding program that is furnished as part of a…KWDmepos item subject to dmepos competitive bidding program number 4KXRequirements specified in the medical policy have been metKYDmepos item subject to dmepos competitive bidding program number 5KZNew coverage not implemented by managed careLCLeft circumflex coronary arteryLDLeft anterior descending coronary arteryLLLease/rental (use the 'll' modifier when dme equipment rental is to be applied against…LMLeft main coronary arteryLRLaboratory round tripLSFda-monitored intraocular lens implantLTLeft side (used to identify procedures performed on the left side of the body)LUFractionated paymentM2Medicare secondary payer (msp)MSSix month maintenance and servicing fee for reasonable and necessary parts and labor…N1Group 1 oxygen coverage criteria metN2Group 2 oxygen coverage criteria metN3Group 3 oxygen coverage criteria metNBNebulizer system, any type, fda-cleared for use with specific drugNRNew when rented (use the 'nr' modifier when dme which was new at the time of rental is…NUNew equipmentP1A normal healthy patientP2A patient with mild systemic diseaseP3A patient with severe systemic diseaseP4A patient with severe systemic disease that is a constant threat to lifeP5A moribund patient who is not expected to survive without the operationP6A declared brain-dead patient whose organs are being removed for donor purposesPASurgical or other invasive procedure on wrong body partPBSurgical or other invasive procedure on wrong patientPCWrong surgery or other invasive procedure on patientPDDiagnostic or related non diagnostic item or service provided in a wholly owned or…PIPositron emission tomography (pet) or pet/computed tomography (ct) to inform the initial…PLProgressive addition lensesPMPost mortemPNNon-excepted service provided at an off-campus, outpatient, provider-based department of…POExcepted service provided at an off-campus, outpatient, provider-based department of a…PSPositron emission tomography (pet) or pet/computed tomography (ct) to inform the…PTColorectal cancer screening test; converted to diagnostic test or other procedureQ0Investigational clinical service provided in a clinical research study that is in an…Q1Routine clinical service provided in a clinical research study that is in an approved…Q2Demonstration procedure/serviceQ3Live kidney donor surgery and related servicesQ4Service for ordering/referring physician qualifies as a service exemptionQ5Service furnished under a reciprocal billing arrangement by a substitute physician or by…Q6Service furnished under a fee-for-time compensation arrangement by a substitute…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…QBPrescribed amounts of stationary oxygen for daytime use while at rest and nighttime use…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)…QGPrescribed amount of stationary oxygen while at rest is greater than 4 liters per minute…QHOxygen conserving device is being used with an oxygen delivery systemQJServices/items provided to a prisoner or patient in state or local custody, however the…QKMedical direction of two, three, or four concurrent anesthesia procedures involving…QLPatient pronounced dead after ambulance calledQMAmbulance service provided under arrangement by a provider of servicesQNAmbulance service furnished directly by a provider of servicesQPDocumentation is on file showing that the laboratory test(s) was ordered individually or…QRPrescribed amounts of stationary oxygen for daytime use while at rest and nighttime use…QSMonitored anesthesia care serviceQTRecording and storage on tape by an analog tape recorderQWClia waived testQXCrna service: with medical direction by a physicianQYMedical direction of one certified registered nurse anesthetist (crna) by an…QZCrna service: without medical direction by a physicianRAReplacement of a dme, orthotic or prosthetic itemRBReplacement of a part of a dme, orthotic or prosthetic item furnished as part of a repairRCRight coronary arteryRDDrug provided to beneficiary, but not administered "incident-to"REFurnished in full compliance with fda-mandated risk evaluation and mitigation strategy…RIRamus intermedius coronary arteryRRRental (use the 'rr' modifier when dme is to be rented)RTRight side (used to identify procedures performed on the right side of the body)SANurse practitioner rendering service in collaboration with a physicianSBNurse midwifeSCMedically necessary service or supplySDServices provided by registered nurse with specialized, highly technical home infusion…SEState and/or federally-funded programs/servicesSFSecond opinion ordered by a professional review organization (pro) per section 9401…SGAmbulatory surgical center (asc) facility serviceSHSecond concurrently administered infusion therapySJThird or more concurrently administered infusion therapySKMember of high risk population (use only with codes for immunization)SLState supplied vaccineSMSecond surgical opinionSNThird surgical opinionSQItem ordered by home healthSSHome infusion services provided in the infusion suite of the iv therapy providerSTRelated to trauma or injurySUProcedure performed in physician's office (to denote use of facility and equipment)SVPharmaceuticals delivered to patient's home but not utilizedSWServices provided by a certified diabetic educatorSYPersons who are in close contact with member of high-risk population (use only with…T1Left foot, second digitT2Left foot, third digitT3Left foot, fourth digitT4Left foot, fifth digitT5Right foot, great toeT6Right foot, second digitT7Right foot, third digitT8Right foot, fourth digitT9Right foot, fifth digitTALeft foot, great toeTBDrug or biological acquired with 340b drug pricing program discount, reported for…TCTechnical component; under certain circumstances, a charge may be made for the technical…TDRnTELpn/lvnTFIntermediate level of careTGComplex/high tech level of careTHObstetrical treatment/services, prenatal or postpartumTJProgram group, child and/or adolescentTKExtra patient or passenger, non-ambulanceTLEarly intervention/individualized family service plan (ifsp)TMIndividualized education program (iep)TNRural/outside providers' customary service areaTPMedical transport, unloaded vehicleTQBasic life support transport by a volunteer ambulance providerTRSchool-based individualized education program (iep) services provided outside the public…TSFollow-up serviceTTIndividualized service provided to more than one patient in same settingTUSpecial payment rate, overtimeTVSpecial payment rates, holidays/weekendsTWBack-up equipmentU1Medicaid level of care 1, as defined by each stateU2Medicaid level of care 2, as defined by each stateU3Medicaid level of care 3, as defined by each stateU4Medicaid level of care 4, as defined by each stateU5Medicaid level of care 5, as defined by each stateU6Medicaid level of care 6, as defined by each stateU7Medicaid level of care 7, as defined by each stateU8Medicaid level of care 8, as defined by each stateU9Medicaid level of care 9, as defined by each stateUAMedicaid level of care 10, as defined by each stateUBMedicaid level of care 11, as defined by each stateUCMedicaid level of care 12, as defined by each stateUDMedicaid level of care 13, as defined by each stateUEUsed durable medical equipmentUFServices provided in the morningUGServices provided in the afternoonUHServices provided in the eveningUJServices provided at nightUKServices provided on behalf of the client to someone other than the client (collateral…UNTwo patients servedUPThree patients servedUQFour patients servedURFive patients servedUSSix or more patients servedV1Demonstration modifier 1V2Demonstration modifier 2V3Demonstration modifier 3V4Demonstration modifier 4V5Vascular catheter (alone or with any other vascular access)V6Arteriovenous graft (or other vascular access not including a vascular catheter)V7Arteriovenous fistula only (in use with two needles)VMMedicare diabetes prevention program (mdpp) virtual make-up sessionVPAphakic patientX1Continuous/broad services: for reporting services by clinicians, who provide the…X2Continuous/focused services: for reporting services by clinicians whose expertise is…X3Episodic/broad services: for reporting services by clinicians who have broad…X4Episodic/focused services: for reporting services by clinicians who provide focused care…X5Diagnostic services requested by another clinician: for reporting services by a…XESeparate encounter, a service that is distinct because it occurred during a separate…XPSeparate practitioner, a service that is distinct because it was performed by a…XSSeparate structure, a service that is distinct because it was performed on a separate…XUUnusual non-overlapping service, the use of a service that is distinct because it does…
Terminated HCPCS modifiers
Codes CMS has ended, kept for looking up older claims. Each page gives its last date of service.
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This list is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes, imported from CMS’s October 2026 HCPCS file and checked against it.
Frequently asked questions
What are HCPCS modifiers?
HCPCS modifiers cover two-character modifiers that add detail to a code: the side of the body, the circumstances of a service, or payer requirements.
How many HCPCS modifiers are there?
CMS’s October 2026 HCPCS file lists 364 active HCPCS modifiers, and 20 more that it has terminated.
Are terminated HCPCS modifiers listed?
Yes, after the active codes, each with its last date of service, for looking up older claims. A terminated code can’t be used for newer services.