CPT code 84379: Sugar analysis, multiple, quantitative2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Quantitative laboratory testing measures multiple sugars in each specimen and distinguishes this service from single-sugar or qualitative sugar analysis.
Medicare pays $11.53 for 84379 under the 2026 Clinical Laboratory Fee Schedule: one national amount, the same in every state and setting.
Medicare lab fee · CLFS 2026 Q4
National CLFS amount
$11.53
In effect since Jan 1, 2026. The same amount in every state, payment locality and setting.
- Geographic adjustment
- None
- Office vs facility
- Same
- Since 2020
- Unchanged
- CMS updates
- Quarterly
Medicare pays the lesser of the lab’s charge and this amount. Patients usually owe no Part B deductible or coinsurance for covered clinical lab tests.
On this page 8 sections
What 84379 covers
This laboratory service measures multiple sugars in a specimen, including sugars from the mono-, di-, and oligosaccharide groups. It is the quantitative option when more than one sugar is measured. Neighboring sugar-analysis codes distinguish a single sugar from multiple sugars and qualitative findings from measured quantities.
Report one service for each specimen analyzed; the number of sugars measured does not increase the specimen count. Medicare pays this test through the CLFS only. The 2026 national CLFS amount is $11.53 and has remained unchanged from 2020 through 2026. One amount applies nationally across states and localities, without geographic adjustment or an office-versus-facility difference. The physician fee schedule classifies the test as excluded by statute, so Medicare payment for this test is through the CLFS.
This summary was written with AI assistance from CMS Clinical Laboratory Fee Schedule data. Amounts on this page come directly from CMS files.
How Medicare pays 84379
Clinical lab tests aren’t priced like physician services. They’re paid from their own fee schedule, with its own rules. See the whole lab fee schedule.
One national amount
CMS sets a single Clinical Laboratory Fee Schedule amount for 84379. There’s no geographic (GPCI) adjustment, so it pays the same in every state and payment locality.
No office or facility rate
Lab tests aren’t built from relative value units, so there’s no office and facility split: the place of service doesn’t change the CLFS amount.
Updated every quarter
CMS republishes the CLFS each quarter. New tests, often proprietary laboratory analyses (PLA codes), join during the year; existing amounts are updated each January.
Excluded from the physician fee schedule
The physician fee schedule lists 84379 with status X (excluded by statute), so the test itself is paid only from the CLFS.
84379 on the lab fee schedule since 2020
84379 · CLFS 2026 Q4 (current)
$11.53
Unchanged since Jan 1, 2020
27 quarterly CLFS releases on file, first CLFS 2020 Q1. A code missing from a quarter wasn’t on that release.
84379 compared with similar tests
- 84378Sugar assaySingle, quantitative$11.53
- Choose 84379 when multiple sugars are quantified in the specimen; 84378 is for quantitative analysis of a single sugar.
- 84377Sugar analysisMultiple sugars, qualitative$5.50
- Choose 84379 for measured amounts of multiple sugars. Code 84377 is the multiple-sugar qualitative service.
- 84375Sugar chromatographyTLC or paper method$39.00
- Code 84375 is a chromatogram assay for sugars; 84379 identifies quantitative analysis of multiple sugars.
84379 billing questions
How does this differ from the single-sugar quantitative code?
This code is for quantitative analysis of multiple sugars in a specimen. Code 84378 is for quantitative analysis of a single sugar.
How does this differ from the multiple-sugar qualitative code?
This code reports quantitative results for multiple sugars. Code 84377 is for qualitative analysis of multiple sugars.
How many units should be reported?
Report one service for each specimen analyzed. The number of sugars measured does not determine the specimen count.
Which Medicare fee schedule pays for this test?
Medicare pays this test through the CLFS only; the physician fee schedule classifies it as excluded by statute.
Does Medicare apply a locality or setting adjustment?
No. One national CLFS amount applies across states and localities, without geographic adjustment or an office-versus-facility difference.
Where this amount comes from
FeeBase reads lab amounts directly from the CMS Clinical Laboratory Fee Schedule file for the quarter: one row per code, with its payment indicator and national amount. Contractor-priced tests are labeled, never given a made-up amount. Amounts are Medicare payment limits, not a patient’s bill or a commercial rate.
CMS CLFS 2026 Q4 · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file line behind this amount
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