In part 1 of this modifier series we identified and discussed the largest category—Global Package Modifiers, and the following modifier categories: GP, BUN, E/M only, #, Anes, Lab, and OTH. In part 2, we will explore the other categories of modifiers starting with the “BUN” grouping.
The following are the modifiers that relate to the bundling of CPT codes or related CCI edits:
| Modifier | Type | Definition | How to Use |
| -25 | BUN, E/M | Significant separately identifiable E/M service | Append to EM codes only to indicate it was separate from that required for the procedure and a clearly documented, distinct and significantly identifiable service was rendered. |
| -26 | BUN | Professional component | Use only on global service codes not on codes that are only for professional component by definition (i.e. 94016 is a professional component code by definition and would not take modifier 26). Use when physician is providing only the interpretation of the diagnostic test/study performed. |
| -59 | BUN | Distinct procedural service | Indicates procedure was distinct or separate from other services provided on same date. Use this modifier as a last resort – if there are other modifiers that would explain the circumstances they CPT directs to use those first. |
There are several situations where one CPT code is bundled into another or mutually exclusive. For example it is an error to charge and office visit code (i.e.. 99212) with a procedure code if the reason for the visit was the procedure only. It is understood that there is an inherent evaluation and management component to doing every procedure and a separate EM should not be billed. There are, of course, circumstances where a truly separate and significant EM was performed in addition to the procedure. Perhaps the patient came in for an office visit but on the way in got a laceration to their arm that needed stitches. The physician performed a laceration repair and also did the scheduled office visit. In this case, modifier 25 would be appended to the EM code to indicate it was not part of the laceration repair. In these situations, it is a good documentation practice to keep the procedure note separate from the EM note so there can be no confusion that they were separate services. This is especially helpful if documentation is requested to support the claim.
Modifier 26 is used when a CPT code such as a radiology code has both a technical and professional component. Medicare provides, in the physician fee schedule database, a column that indicates if codes are considered global and if so what percent they pay for the technical and what percent they pay for the professional. So if a patient has had an x-ray and now a radiologist is doing the reading and interpretation only then modifier 26 would need to be appended to indicate they did not do the technical piece. Hospitals that employee radiologist will bill the technical piece on the 1450 form and bill the professional piece on a 1500 form with modifier 16 appended. Freestanding radiology centers that employ the radiologists will often just bill the radiology code with no modifiers indicating the provided both the technical and professional piece and deserve to get paid the full amount.
The Correct Coding Initative provides edits that indicate when one code is bundled into another or mutually exclusive. For example, a laparatomy is bundled into an oophorectomy and the two should not be billed together; however, some code pairs have a notation that indicates that under some circumstances both codes could be coded together. A patient could have had an oophorectomy in the morning but then a complication arose in the afternoon and an exploratory laparotomy was performed. In this case it would be appropriate to bill the laparotomy with the oophorectomy and would take modifier 59 to indicate that it was indeed distinct from the oophorectomy.
Another family of modifiers is the EM only grouping all of which were discussed on the Global Package or Bundling family of modifiers. The key with these is to remember they only get appended to EM codes.
| Modifier | Type | Definition |
| -24 | GP, E/M | Unrelated E/M service by the same physician during a postop period. |
| -25 | GP, E/M | Significant separately identifiable E/M service . |
| -57 | GP, E/M | Decision for surgery. |
Stay tuned as the next part of this series will discuss the remaining modifier families.
Written by Laureen Jandroep, CPC


2 weeks 5 days ago
40 weeks 2 days ago
41 weeks 3 days ago
51 weeks 4 days ago
1 year 7 weeks ago
1 year 12 weeks ago
1 year 49 weeks ago
2 years 9 weeks ago
2 years 23 weeks ago
2 years 32 weeks ago