Modifiers GN, GO, and GP refer only to services provided under plans of care for physical therapy

by  Christine Woolstenhulme, QCC, QMCS, CPC, CMRS
August 10th, 2015

Modifiers GN, GO, and GP refer only to services provided under plans of care for physical therapy, occupational therapy and speech - language pathology services. They should never be used with codes that are not on the list of applicable therapy services. For example, respiratory therapy services, or nutrition therapy services shall not be represented by therapy codes which require GN, GO, and GP modifiers.
 
Contractors edit institutional claims to ensure the following:
• that a GN, GO or GP modifier is present for all lines reporting revenue codes 042X, 043X, or 044X.
• that no more than on e GN, GO or GP modifier is reported on the same service line.
• that revenue codes and modifiers are reported only in the following combinations:
• Revenue code 42x (physical therapy) lines may only contain modifier GP
• Revenue code 43x (occupational therapy) lines may only contain modifier GO
• Revenue code 44x (speech - language pathology) lines may only contain modifier GN.
• that discipline - specific evaluation and re - evaluation HCPCS codes are always reported with the modifier for the associated discipline (e.g. modifier GP with a HCPCS code for a physical therapy evaluation.
 
There are 42 functional G-codes, 14 sets of three codes each. Six of the  G-code sets generally describe PT and OT functional limitations, and eight sets of G-codes generally describe SLP functional limitations.  For more information click on the link below to see a quick reference chart.
 

 MLN- Quick Reference Chart: Short & Long Descriptorsfor Therapy Functional Reporting G-codes and SEVERITY/COMPLEXITY MODIFIERS

Modifiers GN, GO, and GP refer only to services provided under plans of care for physical therapy. (2015, August 10). Find-A-Code Articles. Retrieved from https://www.findacode.com/articles/modifiers-gn-go-and-gp-refer-only-to-services-provided-under-plans-of-care-for-physical-therapy-31635.html

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