Ordering Recommendation

Use to screen individuals with Merkel cell carcinoma for antibodies suggestive of current or prior infection with Merkel cell polyomavirus.


Multiplex Bead Assay




21-31 days

New York DOH Approval Status

Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.

Specimen Required

Patient Preparation

Plain red or serum separator tube (SST).

Specimen Preparation

Separate from cells ASAP or within 4 hours of collection. Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Frozen. Also acceptable: Refrigerated.

Unacceptable Conditions

Ambient: Unacceptable; Refrigerated: 1 week; Frozen: Indefinitely

Reference Interval

By report

Interpretive Data

Compliance Category

Performed by non-ARUP Laboratory


Screening for the Merkel cell polyomavirus VP1 capsid antibody is done once, on the first specimen submitted. Additional charges apply.

Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
3005984 Merkel Oncoprotein Ab, Titer 18727-8
3005985 Merkel Oncoprotein Ab, Interpretation 11502-2
3005986 Prior Merkel Oncoprotein Ab 18727-8
3005987 Date of Prior Sample 51953-8
3005988 Merkel Disease Status, Interpretation 1 56850-1
3005989 Merkel Disease Status, Interpretation 2 56850-1
3005990 Merkel Ab SmT Method 62364-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • MCC
  • MCPyV
  • polyomavirus oncoprotein antibodies
  • polyomavirus VP1 capsid antibody
  • small T antibodies
Merkel Cell Carcinoma Antibodies

Univ. of Washington/Laboratory Medicine