CPT code 82166: AMH test, ovarian reserve marker2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Measures anti-Müllerian hormone, commonly to assess ovarian reserve and anticipated response to ovarian stimulation, or to evaluate selected ovarian conditions.
Medicare pays $38.62 for 82166 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
$38.62
In effect since Jan 1, 2026. The same amount in every state, payment locality and setting.
- Geographic adjustment
- None
- Office vs facility
- Same
- Since 2024
- 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 7 sections
What 82166 covers
This assay measures anti-Müllerian hormone (AMH), produced by ovarian granulosa cells. Clinicians commonly order it as part of an ovarian reserve evaluation and to help estimate response to ovarian stimulation. It may also support evaluation of polycystic ovary syndrome or follow-up of an AMH-producing granulosa cell tumor. Reproductive endocrinologists, gynecologists, and oncologists may order the test; clinical laboratories perform it on a blood specimen, commonly serum.
Report code 82166 for laboratory testing that measures AMH; the order and clinical record should identify the test and its indication. Medicare pays the code through the CLFS, which has one national amount with no locality or office-versus-facility adjustment. The 2026 national CLFS amount is $38.62, unchanged from 2024 through 2026. Code 82166 is paid only from the CLFS.
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 82166
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 82166. 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 82166 with status X (excluded by statute), so the test itself is paid only from the CLFS.
82166 on the lab fee schedule since 2024
82166 · CLFS 2026 Q4 (current)
$38.62
Unchanged since Jan 1, 2024
12 quarterly CLFS releases on file, first CLFS 2024 Q1. A code missing from a quarter wasn’t on that release.
82166 compared with similar tests
- 83001FSH testFollicle-stimulating hormone$18.58
- This code measures FSH, not AMH. Choose it when the ordered test is follicle-stimulating hormone.
- 82670EstradiolTotal estradiol$27.94
- This code measures estradiol. It is a distinct assay from AMH, even when both are ordered during an ovarian evaluation.
- 86336Inhibin A$15.59
- This code reports an inhibin assay, a different hormone test. Use 82166 when the test performed measures AMH.
82166 billing questions
When is AMH different from FSH testing?
AMH measures a hormone produced by ovarian granulosa cells and is often used to assess ovarian reserve. FSH measures a different hormone and is reported as a separate test.
Is AMH the same as an estradiol test?
No. AMH and estradiol measure different hormones. Report code 82166 when the test performed measures AMH.
Which Medicare fee schedule pays code 82166?
Medicare pays code 82166 through the CLFS. The code is excluded from the physician fee schedule by statute.
Does Medicare adjust the CLFS payment by locality or setting?
No. The code has one national CLFS amount, with no geographic or office-versus-facility adjustment.
Does code 82166 receive a separate physician-fee-schedule payment?
No. Medicare pays this test only through the CLFS.
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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