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).

Modifiers may be used to indicate to the recipient of a report that:

A service or procedure has both a professional and technical component.
A service or procedure was performed by more than one physician and/or in more than one location.
A service or procedure has been increased or reduced.
Only part of a service was performed.
An adjunctive service was performed.
A bilateral procedure was performed.
A service or procedure was provided more than once.
Unusual events occurred.

Modifier	Description	Effective
HU	Funded by child welfare agency	Jan 01, 2003
HV	Funded state addictions agency	Jan 01, 2003
HW	Funded by state mental health agency	Jan 01, 2003
HX	Funded by county/local agency	Jan 01, 2003
HY	Funded by juvenile justice agency	Jan 01, 2003
HZ	Funded by criminal justice agency	Jan 01, 2003
J1	Competitive acquisition program no-pay submission for a prescription number	Jan 01, 2006
J2	Competitive acquisition program, restocking of emergency drugs after emergency administration	Jan 01, 2006
J3	Competitive acquisition program (cap), drug not available through cap as written, reimbursed under average sales price methodology	Jan 01, 2006
J4	Dmepos item subject to dmepos competitive bidding program that is furnished by a hospital upon discharge	Jan 01, 2010
J5	Off-the-shelf orthotic subject to dmepos competitive bidding program that is furnished as part of a physical therapist or occupational therapist professional service	Oct 01, 2020
JA	Administered intravenously	Jan 01, 2007
JB	Administered subcutaneously	Jan 01, 2007
JC	Skin substitute used as a graft	Jan 01, 2009
JD	Skin substitute not used as a graft	Jan 01, 2009
JE	Administered via dialysate	Jul 01, 2013
JF	Compounded drug	Jul 01, 2015
JG	Drug or biological acquired with 340b drug pricing program discount, reported for informational purposes	Jan 01, 2025
JK	One month supply or less of drug or biological	Apr 01, 2023
JL	Three month supply of drug or biological	Apr 01, 2023
JW	Drug amount discarded/not administered to any patient	Jan 01, 2003
JZ	Zero drug amount discarded/not administered to any patient	Jan 01, 2023
K0	Lower extremity prosthesis functional level 0 - does not have the ability or potential to ambulate or transfer safely with or without assistance and a prosthesis does not enhance their quality of life or mobility.	Jan 01, 2003
K1	Lower extremity prosthesis functional level 1 - has the ability or potential to use a prosthesis for transfers or ambulation on level surfaces at fixed cadence. typical of the limited and unlimited household ambulator.	Jan 01, 1997
K2	Lower extremity prosthesis functional level 2 - has the ability or potential for ambulation with the ability to traverse low level environmental barriers such as curbs, stairs or uneven surfaces. typical of the limited community ambulator.	Jan 01, 1997