CPT code 83001: FSH test, follicle-stimulating hormone2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Measures follicle-stimulating hormone in blood to assess reproductive hormone function during evaluation of infertility, menstrual irregularity, or suspected menopause.
Medicare pays $18.58 for 83001 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
$18.58
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
- QW · CLIA-waived test
- $18.58
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 83001 covers
This blood test measures follicle-stimulating hormone (FSH), a pituitary hormone involved in reproductive function. Clinicians commonly order it when evaluating infertility, irregular or absent menstrual periods, suspected menopause, or possible ovarian or pituitary dysfunction. The usual specimen is serum. Hospitals, independent laboratories, and office laboratories may perform the assay; clinicians such as gynecologists, reproductive endocrinologists, and primary care providers use the result in the context of the patient’s clinical evaluation.
Report one unit for each FSH assay performed; the hormone concentration does not change the unit count. CMS lists a CLIA-waived version with modifier QW for sites holding a CLIA certificate of waiver. Medicare pays this test only through the CLFS, using one national amount across states and localities, without geographic or office/facility adjustment. The 2026 national CLFS amount is $18.58, unchanged since 2020. The test is excluded from 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 83001
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 83001. 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 83001 with status X (excluded by statute), so the test itself is paid only from the CLFS.
CLIA-waived version (QW)
CMS also lists 83001 with modifier QW, the version labs holding a CLIA certificate of waiver bill. It pays $18.58.
83001 on the lab fee schedule since 2020
83001 · CLFS 2026 Q4 (current)
$18.58
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.
83001 compared with similar tests
- 83002LH testLuteinizing hormone level$18.52
- Use 83001 for FSH and 83002 for luteinizing hormone (LH). These are separate assays, even when both are ordered for the same reproductive evaluation.
- 83003Growth hormoneHuman growth hormone level$16.67
- 83003 measures growth hormone, not a reproductive gonadotropin. Use 83001 when the analyte tested is FSH.
- 82670EstradiolTotal estradiol$27.94
- 82670 measures estradiol, an estrogen; 83001 measures pituitary FSH. The tests assess different hormones and may be ordered together.
83001 billing questions
How is FSH different from LH?
FSH is reported with 83001; luteinizing hormone (LH) is reported with 83002. They measure different pituitary hormones and may be ordered together in a reproductive evaluation.
What specimen is used?
The usual specimen is serum. Follow the performing laboratory’s collection and handling instructions.
When is modifier QW appropriate?
CMS lists a QW version for the CLIA-waived test. Use QW when the test is performed under applicable CLIA waiver conditions at a site holding a certificate of waiver.
How many units should be reported?
Report one unit for each FSH assay performed. The reported hormone concentration does not create additional units.
How does Medicare pay for 83001?
Medicare pays the test through the CLFS at one national rate across localities. 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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