HCPCS Modifiers List

A modifier provides the means by which the reporting physician or provider can indicate that a service or procedure that has been performed has been altered by some specific circumstance but not changed in its definition or code.

Level I modifiers are codes and descriptors copyrighted by the American Medical Association's current procedural terminology (CPT).

Level II modifiers are codes and descriptors approved and maintained jointly by the alpha-numeric editorial panel (consisting of CMS, the Health Insurance Association of America, and the Blue Cross and Blue Shield Association).

Modifier Description   Effective
GWService not related to the hospice patient's terminal conditionJan 01, 2002
GXNotice of liability issued, voluntary under payer policyApr 01, 2010
GYItem or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefitJul 01, 2007
GZItem or service expected to be denied as not reasonable and necessaryJan 01, 2002
H9Court-orderedJan 01, 2003
HAChild/adolescent programJan 01, 2003
HBAdult program, non geriatricJan 01, 2003
HCAdult program, geriatricJan 01, 2003
HDPregnant/parenting women's programJan 01, 2003
HEMental health programJan 01, 2003
HFSubstance abuse programJan 01, 2003
HGOpioid addiction treatment programJan 01, 2003
HHIntegrated mental health/substance abuse programJan 01, 2003
HIIntegrated mental health and intellectual disability/developmental disabilities programJan 01, 2014
HJEmployee assistance programJan 01, 2003
HKSpecialized mental health programs for high-risk populationsJan 01, 2003
HLInternJan 01, 2003
HMLess than bachelor degree levelJan 01, 2003
HNBachelors degree levelJan 01, 2003
HOMasters degree levelJan 01, 2003
HPDoctoral levelJan 01, 2003
HQGroup settingJan 01, 2003
HRFamily/couple with client presentJan 01, 2003
HSFamily/couple without client presentJan 01, 2003
HTMulti-disciplinary teamJan 01, 2003