Normal Laboratory Values

In the medical field, terminology is the first step to tackle patient care.  Medical transcriptionists require a thorough knowledge of medical terminology, including anatomy, physiology, and pathology.  Coders must also know enough about the body and how it works to be able to code successfully.  In the process of evaluating a patient, laboratory tests are commonly undertaken.  Understanding the “normals” and “abnormals” is sometimes critical to ensure accuracy, particularly in transcription.  It is also useful to know for personal health reasons, for oneself and the related family members.  Here is a list of the “normal” laboratory values.

Normal Lab Values

HEMATOLOGY

Red Blood Cells
RBC (Male) 4.2 – 5.6 M/µL
RBC (Female) 3.8 – 5.1 M/µL
RBC (Child) 3.5 – 5.0 M/µL
White Blood Cells
WBC (Male) 3.8 – 11.0 K / mm cubed
WBC (Female) 3.8 – 11.0 K / mm cubed
WBC (Child) 5.0 – 10.0 K / mm cubed
Hemoglobin
Hgb (Male) 14 – 18 g/dL
Hgb (Female) 11 – 16 g/dL
Hgb (child) 10 – 14 g/dL
Hgb (Newborn) 15 – 25 g/dL
Hematocrit
Hct (Male) 39 – 54%
Hct (Female) 34 – 47%
Hct (Child) 30 – 42%
MCV 78 – 98 fL
MCH 27 – 35 pg
MCHC 31 – 37%
neutrophils 50 – 81%
bands 1 – 5%
lymphocytes 14 – 44%
monocytes 2 – 6%
eosinophils 1 – 5%
basophils 0 – 1%
CARDIAC MARKERS
troponin I 0 – 0.1 ng/ml (onset: 4-6 hrs, peak: 12-24 hrs, return to normal: 4-7 days)
troponin T 0 – 0.2 ng/ml (onset: 3-4 hrs, peak: 10-24 hrs, return to normal: 10-14 days)
myoglobin (Male) 10 – 95 ng/ml (onset: 1-3 hrs, peak: 6-10 hrs, return to normal: 12-24 hrs)
myoglobin (Female) 10 – 65 ng/ml (onset: 1-3 hrs, peak: 6-10 hrs, return to normal: 12-24 hrs)
GENERAL CHEMISTRY
acetone 0.3 – 2.0 mg%
albumin 3.5 – 5.0 gm/dL
alkaline Phosphatase 32 – 110 U/L
anion gap 5 – 16 mEq/L
ammonia 11 – 35 µmol/L
amylase 50 – 150 U/dL
AST, SGOT (Male) 7 – 21 U/L
AST, SGOT (Female) 6 – 18 U/L
bilirubin, direct 0.0 – 0.4 mg/dL
bilirubin, indirect total minus direct
bilirubin, total 0.2 – 1.4 mg/dL
BUN 6 – 23 mg/dL
calcium (total) 8 – 11 mg/dL
carbon dioxide 21 – 34 mEq/L
carbon monoxide symptoms at greater than or equal to 10% saturation
chloride 96 – 112 mEq/L
creatine (male) 0.2 – 0.6 mg/dL
creatine (female) 0.6 – 1.0 mg/dL
creatinine 0.6 – 1.5 mg/dL
ethanol 0 mg%; Coma: greater than or equal to 400 – 500 mg%
folic acid 2.0 – 21 ng/mL
glucose 70 – 110 mg/dL (diuresis greater than or equal to 180 mg/dL)
HDL (male) 25 – 65 mg/dL
HDL (female) 38 – 94 mg/dL
iron 52 – 169 µg/dL
iron binding capacity 246 – 455 µg/dL
lactic acid 0.4 – 2.3 mEq/L
lactate 0.3 – 2.3 mEq/L
lipase 10 – 140 U/L
magnesium 1.5 – 2.5 mg/dL
osmolarity 276 – 295 mOsm/kg
parathyroid hormone 12 – 68 pg/mL
phosphorus 2.2 – 4.8 mg/dL
potasssium 3.5 – 5.5 mEq/L
protein (total) 6.0 – 9.0 gm/dL
SGPT 8 – 32 U/L
sodium 135 – 148 mEq/L
T3 0.8 – 1.1 µg/dL
thyroglobulin Less than 55 ng/mL
thyroxine (T4) total 5 – 13 µg/dL
total protein 5 – 9 gm/dL
TSH Less than 9 µU/mL
urea nitrogen 8 – 25 mg/dL
uric acid (Male) 3.5 – 7.7 mg/dL
uric acid (Female) 2.5 – 6.6 mg/dL
LIPID PANEL (ADULT)
cholesterol (total) Less than 200 mg/dL desirable
cholesterol (HDL) 30 – 75 mg/dL
cholesterol (LDL) Less than 130 mg/dL desirable
triglycerides (Male) Greater than 40 – 170 mg/dL
triglycerides (Female) Greater than 35 – 135 mg/dL
URINE
color Straw
specific gravity 1.003 – 1.040
pH 4.6 – 8.0
Na 10 – 40 mEq/L
K Less than 8 mEq/L
Cl Less than 8 mEq/L
protein 1 – 15 mg/dL
osmolality 80 – 1300 mOsm/L
24 HOUR URINE
amylase 250 – 1100 IU / 24 hr
calcium 100 – 250 mg / 24 hr
chloride 110 – 250 mEq / 24 hr
creatinine 1 – 2 g / 24 hr
creatine clearance (male) 100 – 140 mL / min
creatine clearance (male) 16 – 26 mg / kg / 24 hr
creatine clearance (female) 80 – 130 mL / min
creatine clearance (female) 10 – 20 mg / kg / 24 hr
magnesium 6 – 9 mEq / 24 hr
osmolality 450 – 900 mOsm / kg
phosphorus 0.9 – 1.3 g / 24 hr
potassium 35 – 85 mEq / 24 hr
protein 0 – 150 mg / 24 hr
sodium 30 – 280 mEq / 24 hr
urea nitrogen 10 – 22 gm / 24 hr
uric acid 240 – 755 mg / 24 hr
COAGULATION
ACT 90 – 130 seconds
APTT 21 – 35 seconds
platelets 140,000 – 450,000 / ml
plasminogen 62 – 130%
PT 10 – 14 seconds
PTT 32 – 45 seconds
FSP Less than 10 µg/dL
fibrinogen 160 – 450 mg/dL
bleeding time 3 – 7 minutes
thrombin time 11 – 15 seconds
CEREBRAL SPINAL FLUID
appearance clear
glucose 40 – 85 mg/dL
osmolality 290 – 298 mOsm/L
pressure 70 – 180 mm/H2O
protein 15 – 45 mg/dL
total cell count 0 – 5 cells
WBCs 0 – 6 / µL
HEMODYNAMIC PARAMETERS
cardiac index 2.5 – 4.2 L / min / m squared
cardiac output 4 – 8 LPM
left ventricular stroke work index 40 – 70 g / m squared / beat
mean arterialpPressure 70 – 105 mm Hg
pulmonary vascular resistance 155 – 255 dynes / sec / cm to the negative 5
pulmonary vascular resistance index 255 – 285 dynes / sec / cm to the negative 5
right ventricular stroke work index 7 – 12 g / m squared / beat
stroke volume 60 – 100 mL / beat
stroke volume index 40 – 85 mL / m squared / beat
systemic vascular resistance 900 – 1600 dynes / sec / cm to the negative 5
systemic vascular resistance index 1970 – 2390 dynes / sec / cm to the negative 5
systolic arterial pressure 90 – 140 mm Hg
diastolic arterial pressure 60 – 90 mm Hg
central venous pressure 2 – 6 mm Hg; 2.5 – 12 cm H2O
ejection fraction 60 – 75%
left arterial pressure 4 – 12 mm Hg
pulmonary artery systolic 15 – 30 mm Hg
pulmonary artery diastolic 5 – 15 mm Hg
pulmonary artery pressure 10 – 20 mm Hg
pulmonary artery wedge pressure 4 – 12 mm Hg
pulmonary artery end diastolic pressure 8 – 10 mm Hg
right atrial pressure 4 – 6 mm Hg
right ventricular end diastolic pressure 0 – 8 mm Hg
NEUROLOGICAL VALUES
cerebral perfusion pressure 70 – 90 mm Hg
intracranial pressure 5 – 15 mm Hg or 5 – 10 cm H2O
ARTERIAL VALUES
pH 7.35 – 7.45
PaCO2 35 – 45 mm Hg
HCO3 22 – 26 mEq/L
O2 sat 96 – 100%
PaO2 85 – 100 mm Hg
BE -2 to +2 mmol/L
VENOUS VALUES
pH 7.31 – 7.41
PaCO2 41 – 51 mm Hg
HCO3 22 – 29 mEq/L
O2 sat 60 – 85%
PaO2 30 – 40 mm Hg
BE 0 to +4 mmol/L