CPT code 84377: Sugar analysis, multiple sugars, qualitative2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Qualitative analysis of multiple sugars in a specimen identifies carbohydrate components without measuring their concentrations, distinguishing it from single-sugar and quantitative assays.
Medicare pays $5.50 for 84377 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
$5.50
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 84377 covers
This service qualitatively analyzes multiple sugars in a specimen, encompassing monosaccharides, disaccharides, and oligosaccharides. It characterizes sugars rather than measuring their concentrations. The result is reported as a multiple-sugar qualitative analysis for the specimen. This differs from a qualitative assay limited to one sugar and from assays that quantify one or multiple sugars.
Report one unit for each specimen analyzed; do not count each sugar as a separate unit. Medicare pays code 84377 under the CLFS at one nationally set amount that applies across states and localities, without geographic adjustment or an office-versus-facility difference. The 2026 national CLFS amount is $5.50, unchanged from 2020 through 2026. The physician fee schedule classifies the test as payable only 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 84377
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 84377. 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 84377 with status X (excluded by statute), so the test itself is paid only from the CLFS.
84377 on the lab fee schedule since 2020
84377 · CLFS 2026 Q4 (current)
$5.50
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.
84377 compared with similar tests
- 84376Sugar analysisSingle qualitative$5.50
- Choose 84376 for qualitative analysis of one sugar. Code 84377 is for qualitative analysis of multiple sugars.
- 84378Sugar assaySingle, quantitative$11.53
- Code 84378 is for quantitative analysis of one sugar; 84377 is for qualitative analysis of multiple sugars.
- 84379Sugar analysisMultiple, quantitative$11.53
- Both codes address multiple sugars, but 84379 is quantitative and 84377 is qualitative.
84377 billing questions
When should this code be chosen over 84376?
Use 84377 for qualitative analysis of multiple sugars in a specimen. Code 84376 is for qualitative analysis of one sugar.
Is the code reported per sugar or per specimen?
Report one unit for each specimen analyzed. Do not report a separate unit for each sugar.
How does this differ from quantitative sugar analysis?
This code reports qualitative analysis of multiple sugars. Codes 84378 and 84379 describe quantitative analysis of one sugar and multiple sugars, respectively.
How does Medicare pay for this test?
Medicare pays code 84377 under the CLFS using one national amount across states and localities, with no 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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