CPT code 82507: Urine citrate, metabolic stone evaluation2026 Medicare lab fee · Clinical Laboratory Fee Schedule
Measures citrate in urine, commonly as part of a metabolic evaluation for patients with kidney stones or recurrent stone formation.
Medicare pays $27.80 for 82507 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
$27.80
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 82507 covers
This assay measures citrate, most often in urine during evaluation of kidney stones. Citrate levels help clinicians assess a factor relevant to stone formation, particularly in patients with recurrent stones. Ordering providers may include urologists, nephrologists, and other clinicians evaluating stone risk; a clinical laboratory performs the assay. Citrate is commonly considered alongside other urine measurements in a metabolic stone evaluation.
Report 82507 for citrate measurement. Medicare pays it through the CLFS, not the physician fee schedule. The 2026 national CLFS amount is $27.80 and has remained unchanged since 2020. The CLFS amount is the same in every state and locality, with no geographic or office-versus-facility adjustment. Payment is one amount per code.
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 82507
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 82507. 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 82507 with status X (excluded by statute), so the test itself is paid only from the CLFS.
82507 on the lab fee schedule since 2020
82507 · CLFS 2026 Q4 (current)
$27.80
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.
82507 compared with similar tests
- 82570Urine creatinineUrine specimen$5.18
- Use 82507 for citrate and 82570 for urine creatinine. These distinct analytes may both be measured during a metabolic kidney-stone evaluation.
- 82340Urine calciumTimed quantitative measurement$6.03
- 82507 measures citrate; 82340 measures urine calcium. They are different assays that may both be ordered in a kidney-stone evaluation.
- 83945Oxalate testOxalate-specific assay$14.45
- 82507 measures citrate, whereas 83945 measures urine oxalate. Select the code for the analyte tested.
82507 billing questions
When is 82507 typically ordered?
It is commonly ordered as part of a urine evaluation for kidney stones, especially when assessing recurrent stone risk.
How does 82507 differ from urine creatinine testing?
82507 measures citrate, while 82570 measures urine creatinine. Both may be included in a metabolic stone evaluation, but they measure different substances.
Is 82507 paid under the physician fee schedule?
No. Medicare pays this test through the CLFS; it is excluded from the physician fee schedule.
Does Medicare use a local rate for 82507?
No. The CLFS payment is nationally priced and does not vary by locality or by office versus facility setting.
What does 82507 measure?
It reports citrate measurement, distinct from assays for urine creatinine, calcium, or oxalate.
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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