CPT code 82234: Amyloid beta, 1-42 analyte2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Laboratory testing for beta-amyloid 1-42 is reported with 82234 when this specific analyte is measured.
Medicare pays $128.92 for 82234 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
$128.92
In effect since Jan 1, 2026. The same amount in every state, payment locality and setting.
- Geographic adjustment
- None
- Office vs facility
- Same
- Since 2026
- 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 82234 covers
82234 identifies laboratory testing directed at beta-amyloid 1-42. It distinguishes this analyte from beta-amyloid 1-40, which is identified by 82233. A laboratory reports 82234 when the assay performed measures beta-amyloid 1-42; the code identifies the analyte rather than a general beta-protein assay. Code selection follows the analyte actually tested, not a presumed paired measurement.
Medicare pays 82234 only through the CLFS. The 2026 national CLFS amount is $128.92, with one amount applying in every state and locality and no geographic or office-versus-facility adjustment. The test is excluded from the physician fee schedule, so payment is through the CLFS rather than a separate physician interpretation component under that schedule. Report 82233 separately when beta-amyloid 1-40 is also measured; its code represents a different analyte, not an extra unit of 82234.
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 82234
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 82234. 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 82234 with status X (excluded by statute), so the test itself is paid only from the CLFS.
82234 on the lab fee schedule since 2025
82234 · CLFS 2026 Q4 (current)
$128.92
Unchanged since Jan 1, 2026
Every change on file
- Jan 1, 2026 · CLFS 2026 Q1MAC-priced → $128.92
8 quarterly CLFS releases on file, first CLFS 2025 Q1. A code missing from a quarter wasn’t on that release.
82234 compared with similar tests
- 82233Beta-amyloidAβ40 peptide$128.92
- 82233 identifies beta-amyloid 1-40; 82234 identifies beta-amyloid 1-42. Select according to the analyte tested.
- 82232Beta-2 microglobulinProtein level assay$16.18
- 82232 is an assay of beta-2 protein, not beta-amyloid 1-42. The similar name does not indicate the same analyte.
- 83520Quantitative immunoassayNot otherwise specified$17.27
- 83520 is a general immunoassay code; 82234 identifies beta-amyloid 1-42 specifically.
82234 billing questions
When should 82234 be used instead of 82233?
Use 82234 for beta-amyloid 1-42 and 82233 for beta-amyloid 1-40. Select the code for the analyte tested.
Can 82234 and 82233 both be reported?
They identify different analytes. Report each code when the laboratory performs the corresponding test.
Is a physician interpretation separately payable for 82234?
No. Medicare pays this test only through the CLFS, and it is excluded from the physician fee schedule.
How does Medicare pay 82234?
Medicare uses one national CLFS amount across states and localities, without geographic 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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