Lab test abbreviations

Updated October 29, 2026

Complete blood count (CBC)

Abbreviation	Name	Common units
WBC	White blood cell count, Leukocytes	×10⁹/L, ×10³/µL
RBC	Red blood cell count, Erythrocytes	×10¹²/L, ×10⁶/µL
HGB / Hb	Hemoglobin	g/L, g/dL
HCT / Hct / Ht	Hematocrit	%, L/L
MCV	Mean corpuscular volume	fL
MCH	Mean corpuscular hemoglobin	pg
MCHC	Mean corpuscular hemoglobin concentration	g/L, g/dL
RDW-CV	Red cell distribution width, coefficient of variation	%
RDW-SD	Red cell distribution width, standard deviation	fL
PLT	Platelet count	×10⁹/L, ×10³/µL
MPV	Mean platelet volume	fL
NEUT / NE	Neutrophils	%, ×10⁹/L
LYMPH / LY	Lymphocytes	%, ×10⁹/L
MONO / MO	Monocytes	%, ×10⁹/L
EOS / EO	Eosinophils	%, ×10⁹/L
BASO / BA	Basophils	%, ×10⁹/L
RET / RETIC	Reticulocytes	%

Urinalysis

Abbreviation	Name	Common units
pH	Urine pH	—
SG	Urine specific gravity	—
PRO	Urine protein	—
GLU	Urine glucose	—
KET	Urine ketones	—
BLD / OB	Urine blood, Occult blood	—
BIL	Urine bilirubin	—
URO / UBG	Urobilinogen	—
NIT	Nitrite	—
LEU	Leukocyte esterase	—
RBC	Urine red blood cells	/HPF, /µL
WBC	Urine white blood cells	/HPF, /µL

Liver function

Abbreviation	Name	Common units
ALT / GPT / SGPT	Alanine aminotransferase	U/L
AST / GOT / SGOT	Aspartate aminotransferase	U/L
GGT / γ-GT / γ-GTP	Gamma-glutamyl transferase	U/L
ALP	Alkaline phosphatase	U/L
TBIL / T-Bil	Total bilirubin	µmol/L, mg/dL
DBIL / D-Bil	Direct bilirubin	µmol/L, mg/dL
IBIL / I-Bil	Indirect bilirubin	µmol/L, mg/dL
TP	Total protein	g/L, g/dL
ALB / Alb	Albumin	g/L, g/dL
GLB / GLOB	Globulin	g/L, g/dL
A/G	Albumin/globulin ratio	—

Kidney function

Abbreviation	Name	Common units
Cr / CRE / CREA	Creatinine	µmol/L, mg/dL
BUN	Blood urea nitrogen	mg/dL
Urea	Urea	mmol/L
UA	Uric acid	µmol/L, mg/dL
eGFR	Estimated glomerular filtration rate	mL/min/1.73m²
Cys C	Cystatin C	mg/L

Blood sugar

Abbreviation	Name	Common units
FPG / GLU / Glucose AC	Fasting plasma glucose	mmol/L, mg/dL
HbA1c	Hemoglobin A1c, Glycated hemoglobin	%, mmol/mol

Cholesterol and lipids

Abbreviation	Name	Common units
TC / CHOL / T-Cho	Total cholesterol	mmol/L, mg/dL
TG	Triglycerides	mmol/L, mg/dL
HDL-C	HDL cholesterol	mmol/L, mg/dL
LDL-C	LDL cholesterol	mmol/L, mg/dL
non-HDL-C	Non-HDL cholesterol	mmol/L, mg/dL
Lp(a)	Lipoprotein(a)	mg/dL, nmol/L

Electrolytes

Abbreviation	Name	Common units
Na	Sodium	mmol/L
K	Potassium	mmol/L
Cl	Chloride	mmol/L
Ca	Calcium	mmol/L, mg/dL
P / IP	Phosphorus	mmol/L, mg/dL
Mg	Magnesium	mmol/L, mg/dL

Thyroid function

Abbreviation	Name	Common units
TSH	Thyroid-stimulating hormone	mIU/L, µIU/mL
FT4	Free thyroxine	pmol/L, ng/dL
FT3	Free triiodothyronine	pmol/L, pg/mL

Inflammation

Abbreviation	Name	Common units
CRP	C-reactive protein	mg/L, mg/dL
hs-CRP	High-sensitivity C-reactive protein	mg/L
ESR	Erythrocyte sedimentation rate	mm/h

Coagulation

Abbreviation	Name	Common units
PT	Prothrombin time	s
INR / PT-INR	International normalized ratio	—
APTT	Activated partial thromboplastin time	s
FIB / Fbg	Fibrinogen	g/L, mg/dL
D-dimer	D-dimer	mg/L FEU, µg/mL FEU

Tumor markers

Abbreviation	Name	Common units
AFP	Alpha-fetoprotein	ng/mL, IU/mL
CEA	Carcinoembryonic antigen	ng/mL
CA 19-9	Cancer antigen 19-9	U/mL
CA 125	Cancer antigen 125	U/mL
CA 15-3	Cancer antigen 15-3	U/mL
PSA / tPSA	Prostate-specific antigen	ng/mL
fPSA	Free prostate-specific antigen	ng/mL

Hepatitis B

Abbreviation	Name	Common units
HBsAg	Hepatitis B surface antigen	IU/mL, S/CO
Anti-HBs / HBsAb	Hepatitis B surface antibody	mIU/mL
HBeAg	Hepatitis B e antigen	S/CO
Anti-HBe / HBeAb	Hepatitis B e antibody	S/CO
Anti-HBc / HBcAb	Hepatitis B core antibody	S/CO

Other tests

Abbreviation	Name	Common units
SF	Ferritin	ng/mL, µg/L
Fe	Serum iron	µmol/L, µg/dL
25(OH)D	25-hydroxyvitamin D	ng/mL, nmol/L
Vit B12	Vitamin B12	pg/mL, pmol/L
Hcy	Homocysteine	µmol/L
CK	Creatine kinase	U/L
LDH / LD	Lactate dehydrogenase	U/L
AMY	Amylase	U/L

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