CPT code 84446: Vitamin E, alpha-tocopherol level2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Measures alpha-tocopherol to assess vitamin E status, including when deficiency is suspected in patients with fat malabsorption.
Medicare pays $14.18 for 84446 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
$14.18
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 7 sections
What 84446 covers
Vitamin E testing measures alpha-tocopherol. A clinical laboratory performs the assay on a blood specimen, commonly serum, and reports the result to the ordering clinician. Clinicians may request it when assessing suspected vitamin E deficiency, including in patients with fat malabsorption. The result is interpreted with the patient's clinical and nutritional context. It is a single nutrient assay rather than a multivitamin panel.
Report 84446 for the vitamin E assay. Medicare pays it only under the CLFS, with one nationally set amount applying across states and localities and no office-versus-facility difference. The 2026 national CLFS amount is $14.18, unchanged from 2020 through 2026. The service is excluded from the physician fee schedule by statute, so Medicare payment is through 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 84446
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 84446. 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 84446 with status X (excluded by statute), so the test itself is paid only from the CLFS.
84446 on the lab fee schedule since 2020
84446 · CLFS 2026 Q4 (current)
$14.18
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.
84446 compared with similar tests
- 84425Thiamine testVitamin B-1 level$21.23
- 84425 measures vitamin B1; 84446 measures vitamin E as alpha-tocopherol. Select according to the vitamin being assessed.
- 84590Vitamin A$11.61
- 84590 measures vitamin A, not vitamin E. These codes identify separate nutrient assays.
- 82306Vitamin D test25-hydroxy level$29.60
- 82306 is a vitamin D assay. It does not report the alpha-tocopherol measurement represented by 84446.
84446 billing questions
What does 84446 measure?
It measures vitamin E as alpha-tocopherol.
How is 84446 different from the vitamin B1 assay?
84446 measures vitamin E as alpha-tocopherol. Use 84425 for a vitamin B1 assay.
Is 84446 a vitamin panel?
No. It reports a vitamin E measurement, not a panel of multiple vitamins.
How does Medicare pay for 84446?
Medicare pays for 84446 through the CLFS only, at one national amount across localities and settings.
Is a physician interpretation paid separately under the physician fee schedule?
No. 84446 is excluded from the physician fee schedule, and Medicare pays for the test through the CLFS only.
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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