Order Code LAB2061 Reticulocyte Count, Blood

Useful For

Assessing erythropoietic bone marrow activity in anemia and other hematologic conditions

Specimen Requirements

Specimen Type: Whole Blood

Collection Container/Tube: Lavender (EDTA)

Pediatric Collection Container/Tube: Lavender Microtainer (EDTA)

Specimen Volume: optimal 2 mL, minimum 1 mL

Pediatric (microtainer) volume: 0.5 mL

Whole blood specimen should be inverted gently several times to mix blood immediately after collection.

Specimen Stability

Specimen Type	Temperature	Stability
Whole Blood	Refrigerated	24 hours

Rejection Criteria

Samples that do not meet minimum volume requirements
Incorrect collection container
Clotted or visibly hemolyzed

Reference Values

STARTING MARCH 31, 2026

Gender abbreviations (M=Male, F=Female, U=Unknown, Unspecified, X=Neither Male nor Female)

Age/ gender	Retic %	Retic #X10⁶/uL	IRF %	Retic Hgb pg
0-4 Days M,F,U,X	3.47-5.40	0.1475-0.2164	30.5-35.1	27.6-38.7
4 days -1 mo M,F,U,X	1.06-2.37	0.0513-0.1104	14.5-24.6	27.6-38.7
1-2 mo M,F,U,X	2.12-3.47	0.0518-0.0779	19.1-28.9	27.6-38.7
2-6 mo M,F,U,X	1.55-2.70	0.0482-0.0882	13.4-23.3	27.6-38.7
6 mo-2 years M,F,U,X	0.99-1.82	0.0435-0.1111	11.4-25.8	*
2-6 years M,F,U,X	0.82-1.45	0.0364-0.0680	8.4-21.7	*
6-12 years M,F,U,X	0.98-1.94	0.0424-0.0702	8.9-24.1	*
12-18 years M,F,U,X	0.90-1.49	0.0416-0.0651	9.0-18.7	*
≥18 years M	0.60-2.71	0.0304-0.1109	2.3-13.5	*
≥18 years F	0.60-2.71	0.0304-0.1109	2.3-15.5	*
≥18 years U,X	0.60-2.71	0.0304-0.1109	2.3-15.5	*

*only run on patients < 6 months old

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Ridgeview Medical Center Laboratory

Methodology

Flow Cytometry Using Semiconductor Laser

Test Classification and CPT Coding

85045