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Reticulocyte Count

Item Value
Approval req'd? No
Available Stat? No
Test code RET
Performed by Parnassus & Mission Bay Hematology
In House Availability Test available 24 hours per day 7 days per week.
Method Flow cytometry and/or light microscopy
Container type Lavender top
Amount to Collect 3 mL blood
Sample type EDTA whole blood
Preferred volume 3 mL blood
Min. Volume 1 mL blood
Processing notes Do not centrifuge.

When a Reticulocyte Count must be performed manually and an RBC count is not available from a CBC or CBCD on the same sample, order an RBC.
Units x109/L
Normal range
Age Male Female
≤ 4 days 65-230 x109/L 65-230 x109/L
5-30 days 17-114 x109/L 17-86 x109/L
31-60 days 30-129 x109/L 52-112 x109/L
61-180 days 36-127 x109/L 44-116 x109/L
6 months - 2 years 36-91 x109/L 40-90 x109/L
2 years - < 6 years 35-89 x109/L 35-93 x109/L
6 years - < 12 years 31-98 x109/L 35-124 x109/L
12 years - <18 years 38-104 x109/L 35-97 x109/L
≥ 18 years (Automated) 29.0-121.4 x109/L 25.6-96.9 x109/L
≥ 18 years (Manual) 21.6-115.9 x109/L 16.2-99.8 x109/L

The ranges 5 days to <18 years have been extrapolated from the following reference: Steven J. Soldin, Carlo Brugnara, et al. Pediatric reference ranges, 2nd ed. Washington, DC: AACC Press, 1997
Synonyms Retic count;
Stability Specimens are stable at room temperature for 48 hours, for 72 hours at 4C.
Turn around times Turnaround time 24 hours.
Additional information Manual methods are much less accurate, and give somewhat lower results (reference range: Male >=18 year old 21.6-115.9 x 109/L, Female >=18 year old 16.2 - 99.8 x 109/L). A manual assay will be performed if required due to sample or fluorescent assay problem. For <18 year old refer to the normal range table above.

If unusual findings are noted a pathologist review and interpretation may be performed and separately billed for
CPT coding 85045
LOINC code 14196-0
Last Updated 1/9/2018 6:43:21 PM
Entry Number 824
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