HCPCS code G0328: FIT screening, one to three simultaneous tests2026 Medicare lab fee · Clinical Laboratory Fee Schedule
G0328 reports immunochemical fecal occult blood screening using one to three simultaneous tests to screen for colorectal cancer.
Medicare pays $18.05 for G0328 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
$18.05
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
- $18.05
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 G0328 covers
G0328 reports colorectal cancer screening by an immunochemical fecal occult blood test, commonly called FIT. The assay detects blood in stool and covers one to three simultaneous tests. It differs from guaiac-based fecal occult blood testing and stool DNA testing. A clinical laboratory or a site with a CLIA certificate of waiver may perform and report the test; CMS lists modifier QW for the waived version. A positive screening result can lead to diagnostic colonoscopy, which is reported separately when performed.
Report one G0328 for the covered one-to-three-test range, rather than a separate line for each test. Medicare pays G0328 through the CLFS, with one national amount across localities and no office or facility payment difference. The 2026 national amount is $18.05, unchanged since 2020. G0328 is excluded from the physician fee schedule by statute and paid only 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 G0328
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 G0328. 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 G0328 with status X (excluded by statute), so the test itself is paid only from the CLFS.
CLIA-waived version (QW)
CMS also lists G0328 with modifier QW, the version labs holding a CLIA certificate of waiver bill. It pays $18.05.
G0328 on the lab fee schedule since 2020
G0328 · CLFS 2026 Q4 (current)
$18.05
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.
G0328 compared with similar tests
- 82270Fecal occult bloodThree consecutive stool samples$4.38
- 82270 is for guaiac-based fecal occult blood testing. G0328 is for immunochemical testing used for colorectal cancer screening.
- 82274FIT stool testImmunoassay, 1–3 determinations$15.92
- 82274 describes immunochemical fecal occult blood testing in the CPT code set. G0328 is the HCPCS code for Medicare colorectal cancer screening; the shared method alone does not make the codes interchangeable.
- G0327Blood-based screeningColorectal cancer biomarkerNo national amount
- G0327 is a blood-based biomarker screening test. G0328 is an immunochemical test performed on stool.
- 81528Stool DNA testDNA markers and hemoglobin$508.87
- 81528 represents stool DNA colorectal screening, not an immunochemical fecal occult blood test.
G0328 billing questions
When should G0328 be reported instead of a guaiac-based stool test?
Use G0328 for colorectal cancer screening performed by immunoassay. Guaiac-based fecal occult blood testing is a different method, represented by codes such as 82270.
Does G0328 cover more than one stool test?
Yes. G0328 covers one to three simultaneous tests; do not report a separate G0328 line for each test.
When is modifier QW relevant?
CMS lists QW for the CLIA-waived version. It identifies testing performed under a CLIA certificate of waiver.
Is a colonoscopy included in G0328?
No. G0328 reports the screening laboratory test; a colonoscopy performed after a positive result is reported separately.
How does Medicare pay G0328?
Medicare pays the test through the CLFS only. The national amount is the same across localities and office and facility settings.
How does G0328 differ from CPT 82274?
Both describe immunochemical fecal occult blood testing. G0328 is the HCPCS code for Medicare colorectal cancer screening; use the code appropriate to the claim and service.
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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