CPT code 87336: Entamoeba antigen, histolytica/dispar group2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Immunoassay detection of Entamoeba histolytica/dispar group antigen, reported for qualitative or semiquantitative testing of this parasite group.
Medicare pays $16.00 for 87336 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
$16.00
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 87336 covers
This immunoassay detects antigen from the Entamoeba histolytica/dispar group and produces a qualitative or semiquantitative result. Clinical laboratories typically perform it on stool during evaluation for intestinal amebiasis. The test detects antigen rather than counting organisms. Code 87336 identifies the histolytica/dispar group assay, distinct from an assay directed to the Entamoeba histolytica group.
Report 87336 for testing directed at this antigen group. Medicare pays the test only under the CLFS, at one national amount per code with no locality or office-versus-facility adjustment. The 2026 national CLFS amount is $16.00, unchanged from 2020 through 2026.
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 87336
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 87336. 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 87336 with status X (excluded by statute), so the test itself is paid only from the CLFS.
87336 on the lab fee schedule since 2020
87336 · CLFS 2026 Q4 (current)
$16.00
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.
87336 compared with similar tests
- 87337Entamoeba antigenGroup antigen$11.98
- Choose 87336 for the Entamoeba histolytica/dispar group assay; 87337 is directed to the Entamoeba histolytica group.
- 87329Giardia antigenImmunoassay detection$11.98
- 87329 detects Giardia antigen, not antigen from the Entamoeba histolytica/dispar group.
- 87328Cryptosporidium antigenImmunoassay detection$13.82
- 87328 detects Cryptosporidium antigen, not antigen from the Entamoeba histolytica/dispar group.
87336 billing questions
How does 87336 differ from 87337?
87336 is for an antigen assay for the Entamoeba histolytica/dispar group. Code 87337 is for an assay directed to the Entamoeba histolytica group.
What specimen is generally tested?
The test is generally performed on stool when evaluating for intestinal amebiasis.
Is 87336 a molecular test?
No. It represents antigen detection by immunoassay, with a qualitative or semiquantitative result.
How does Medicare pay for 87336?
Medicare pays it only under the CLFS, using one national amount per code without locality or office-versus-facility adjustment.
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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