GKHCPCS Level II
Reasonable and necessary item/service associated with a ga or gz modifier
- Usage notes
- Append to an item or service that is reasonable and necessary and is associated with a GA or GZ modifier item on the same claim.
- Common mistakes
- Using GK on an item unrelated to a GA/GZ-modified item on the same claim — GK is meant to pair with a specific denial-related line, not stand alone.
Related modifiers
G0Telehealth services for diagnosis, evaluation, or treatment, of symptoms of anG1Most 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 aG7Pregnancy resulted from rape or incest or pregnancy certified by physician as
Frequently asked questions
What does modifier GK mean?
Reasonable and necessary item/service associated with a ga or gz modifier
When do I use modifier GK?
Append to an item or service that is reasonable and necessary and is associated with a GA or GZ modifier item on the same claim.
What's a common mistake with modifier GK?
Using GK on an item unrelated to a GA/GZ-modified item on the same claim — GK is meant to pair with a specific denial-related line, not stand alone.
HCPCS modifier data from CMS. CPT® is a registered trademark of the American Medical Association — CPT modifier descriptions are not included on this site. Always verify codes with authoritative sources before making billing decisions.