The old FY2006 ICD-9-CM book featured a revised entry that clarified how to code â€śLiver Function Testsâ€ť and how they differed from â€śLiver Function Studies.â€ť Since that time, it has been important that coders make a distinction between â€śtestsâ€ť and â€śstudiesâ€ť â€“ both the ICD-9-CM book and CodeRyteâ€™s NLP software coding engine make the important distinction, too.
A brief overview:
The Alphabetical Index in the ICD-9-CM book was changed as of Oct. 1, 2005. There were two â€śnewâ€ť entries that were added:
Elevation; liver function test (LFT), 790.6
Findings, abnormal; liver function test, 790.6
Now, as of Oct. 1, 2008, there is another clarifying entry:
Abnormal; liver function test, 790.6
Since FY2006 (with a bit of reinforcement for FY2009), "test" means "lab test" and isn't coded with the 794.8 code. An abnormal or elevated Liver Function Test would be coded as 790.6 if that is all that's documented. However, Abnormal liver function Studies or Scans are still 794.8 (because these are images, they can't really be â€śelevatedâ€ť).
Abnormal; function study; liver, 794.8
Abnormal; scan; liver, 794.8
Findings, abnormal; function study; liver, 794.8
Findings, abnormal; scan; liver, 794.8