CPT code 86644: CMV antibody, general antibody assay2026 Medicare lab fee · Clinical Laboratory Fee Schedule
CMV antibody testing analyzes antibodies to cytomegalovirus and is reported when a laboratory performs this general CMV antibody test.
Medicare pays $14.39 for 86644 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
$14.39
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 86644 covers
86644 identifies laboratory analysis for antibodies to cytomegalovirus (CMV). It is the general CMV antibody code, distinct from 86645, which identifies CMV IgM antibody testing. Report this code when the laboratory service analyzes CMV antibody rather than antibodies to a different infectious agent. This distinction keeps the reported analyte aligned with the test performed.
Medicare pays 86644 through the Clinical Laboratory Fee Schedule (CLFS), at one national amount per code. The 2026 national CLFS amount is $14.39 and has remained unchanged since 2020. The same amount applies in every state and locality, without geographic adjustment or an office-versus-facility difference. The code is excluded from the physician fee schedule and is 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 86644
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 86644. 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 86644 with status X (excluded by statute), so the test itself is paid only from the CLFS.
86644 on the lab fee schedule since 2020
86644 · CLFS 2026 Q4 (current)
$14.39
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.
86644 compared with similar tests
- 86645CMV antibodyIgM antibody$16.85
- 86644 identifies general CMV antibody testing; 86645 identifies CMV IgM antibody testing.
- 86663EBV antibodyEarly antigen$13.12
- 86663 identifies Epstein-Barr virus antibody testing, whereas 86644 is for CMV antibodies.
- 86665VCA antibodyEpstein-Barr virus$18.14
- 86665 identifies Epstein-Barr virus capsid antibody testing; 86644 is for CMV antibodies.
86644 billing questions
How does 86644 differ from 86645?
86644 identifies general CMV antibody testing. Use 86645 for CMV IgM antibody testing.
What test does 86644 identify?
It identifies laboratory analysis for antibodies to cytomegalovirus (CMV).
How does 86644 differ from Epstein-Barr virus antibody codes?
86644 is for CMV antibodies. Codes 86663 and 86665 identify Epstein-Barr virus antibody testing.
How does Medicare pay for 86644?
Medicare pays the test through the CLFS using one national amount per code, with no geographic or office-versus-facility adjustment.
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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