CPT code 82787: IgG subclasses, each subclass2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Measures an individual IgG subclass (IgG1, IgG2, IgG3, or IgG4) and is reported for each subclass determination performed.
Medicare pays $8.02 for 82787 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
$8.02
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 82787 covers
82787 represents measurement of an individual IgG subclass—IgG1, IgG2, IgG3, or IgG4. The result is a subclass-specific gammaglobulin measurement, distinct from a total IgG or other immunoglobulin-class assay. Each reported determination corresponds to one of the four subclasses, rather than an aggregate measurement of all four.
Report one unit for each subclass measured; testing all four subclasses is four units. Medicare pays 82787 only through the Clinical Laboratory Fee Schedule (CLFS), at one national amount that applies in every state and locality without an office-versus-facility adjustment. The 2026 national CLFS amount is $8.02, unchanged since 2020. The physician fee schedule excludes the test by statute, so the laboratory test is paid through the CLFS rather than the physician fee schedule.
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 82787
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 82787. 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 82787 with status X (excluded by statute), so the test itself is paid only from the CLFS.
82787 on the lab fee schedule since 2020
82787 · CLFS 2026 Q4 (current)
$8.02
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.
82787 compared with similar tests
82787 billing questions
How many units should be reported?
Report one unit for each IgG subclass measured. Testing IgG1, IgG2, IgG3, and IgG4 is four units.
How does code 82787 differ from code 82784?
Code 82787 measures individual IgG subclasses. Code 82784 measures an immunoglobulin class, such as IgG overall.
Is code 82787 used for an IgE test?
No. Code 82787 is for IgG subclasses; code 82785 is for total IgE.
How does Medicare pay for code 82787?
Medicare pays it through the CLFS at one national amount across localities, without an 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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