CPT code 84402: Free testosterone, unbound hormone fraction2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Measures circulating free testosterone to assess androgen status, especially when symptoms or binding-protein changes make total testosterone less informative.
Medicare pays $25.47 for 84402 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
$25.47
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 84402 covers
This assay measures the unbound fraction of testosterone circulating in blood. Clinicians may order it when evaluating suspected hypogonadism or androgen excess, including when symptoms do not align with a total testosterone result or altered sex hormone-binding globulin may affect interpretation. A laboratory performs the assay on a blood specimen, typically serum. It reports free testosterone, not total or bioavailable testosterone.
Report 84402 for the free testosterone assay performed; total testosterone and bioavailable testosterone are distinct tests. Medicare pays this test through the Clinical Laboratory Fee Schedule (CLFS), not the physician fee schedule. The 2026 national CLFS amount is $25.47, unchanged since 2020. One national amount applies across states and localities, with no office-versus-facility difference.
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 84402
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 84402. 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 84402 with status X (excluded by statute), so the test itself is paid only from the CLFS.
84402 on the lab fee schedule since 2020
84402 · CLFS 2026 Q4 (current)
$25.47
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.
84402 compared with similar tests
- 84403TestosteroneTotal hormone level$25.81
- Use 84402 for the free fraction and 84403 for total testosterone. They measure different portions of circulating testosterone and may be ordered together.
- 84410TestosteroneBioavailable fraction$51.28
- 84410 measures bioavailable testosterone, which includes free testosterone and the fraction loosely bound to albumin; 84402 is for free testosterone.
84402 billing questions
When should 84402 be reported instead of 84403?
Report 84402 when the laboratory measures free testosterone. Report 84403 when it measures total testosterone; the two codes identify different analytes.
How does 84402 differ from 84410?
84402 measures free testosterone, while 84410 measures bioavailable testosterone. Select the code that matches the assay performed and result reported.
Does 84402 include total testosterone or SHBG testing?
No. It identifies the free testosterone assay. Total testosterone and sex hormone-binding globulin are separate tests when ordered and performed.
How does Medicare pay 84402?
Medicare pays it under the CLFS at one national rate, without locality or office-versus-facility adjustments. It is excluded from the physician fee schedule.
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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