CD19+ B Cell Count

General Information

Lab Name

CD19+ B Cell Count

Lab Code

BCS19

Epic Name

CD19+ B Cell Count

Description

Notice:

The UW Hematopathology Laboratory is currently being impacted by a global supply shortage of a critical component of our Lymphocyte Subset Enumeration assays. Until reagent is made available by the manufacturer, lymphocyte subset enumeration assays listed below will be sent to a referral laboratory for testing as early as Friday, September 23. To ensure sample viability for testing, please schedule collections so that samples are received in our lab on weekdays and no later than noon on Fridays. Samples received later than noon on Friday or over the weekend will have an increased risk for cancellation due to limited stability.

The following tests are affected:

· T cell subsets CD4/CD8 only, counts [TCS48]

· T cell subsets CD3/CD4/CD8, counts [TCSA]

· Lymphocyte subsets, T and B cell counts [TCSP]

· Lymphocyte subsets, T, B, NK cell counts [TCSNK]

· CD19+ B Cell Count [BCS19]

B cell subset for CD19 only.

All lymphocyte subset panels offered:
T cell subsets CD4/CD8 only, counts [TCS48] - CD4, CD8
T cell subsets CD3/CD4/CD8, counts [TCSA] - CD4, CD8, CD3
Lymphocyte subsets, T and B cell counts [TCSP] - CD4, CD8, CD3, CD19
Lymphocyte subsets, T, B, NK cell counts [TCSNK] - CD4, CD8, CD3, CD19, CD56
CD19+ B Cell Count [BCS19] - CD19 only

Components

Code Name
CD19P % CD19
CD19A Abs CD19 Lymphocyte Count
NFDA4 Test Comment

Interpretation

Method

Single Platform method via Flow Cytometry

Reference Range

See individual components

Ordering & Collection

Specimen Type

Blood

Collection

3 or 5 mL Lavender (EDTA) tube

Handling Instructions

Specimens must be tested within 24 hours of collection. For samples received >24 hours after collection, test will be cancelled and a re-draw requested.

Processing

Stability: 24 hours @Room Temperature

SPS: Sample can be shared with CBC. Do not add on test if sample will be received in the Hematopathology lab outside the 24-hour stability limit.

Outside Laboratories: Specimens must be tested within 24 hours of collection. For samples received > 24 hours after collection, test will be canceled and a re-draw will be requested. Contact Lab Med Call Center 206-685-6066 to discuss transportation options.

Performance

LIS Dept Code

Hematopathology (HP)

Performing Location(s)

Other Hematopathology
206-606-7060

UW Hematopathology Laboratory, G7-800
Fred Hutchinson Cancer Center
825 Eastlake Avenue E.
Seattle, WA 98109

Frequency

Monday-Sunday. For same day testing, sample must arrive in Hematopathology lab by 5pm Monday - Saturday and 2:30pm on Sunday. Testing is offered on the following holidays: Veteran's Day, MLK, Day after Thanksgiving. NOT offered on: President's day, Memorial day, 4th of July, Labor day, Thanksgiving, Christmas, or New Year’s Day.

Available STAT?

No

Billing & Coding

CPT codes

86355

LOINC

731-0