MS Laboratory & Diagnostic Testing — Questions and Answers

Question 1: What does CBC stand for in medical documentation?

Complete Blood Chemistry
Complete Blood Count (Correct answer)
Comprehensive Blood Culture
Certified Blood Count

Correct answer: Complete Blood Count

CBC stands for Complete Blood Count, a routine panel that measures red blood cells, white blood cells, and platelets.

Question 2: Which laboratory value is primarily used to assess kidney function?

ALT
TSH
Creatinine (Correct answer)
Bilirubin

Correct answer: Creatinine

Creatinine is a waste product filtered by the kidneys, and elevated levels indicate impaired renal function.

Question 3: In an Arterial Blood Gas (ABG) report, which value directly indicates the patient's blood acidity or alkalinity?

PaO2
pH (Correct answer)
PaCO2
HCO3

Correct answer: pH

The pH value in an ABG directly measures the acidity or alkalinity of arterial blood, with normal range 7.35–7.45.

Question 4: What is the normal range for fasting blood glucose in an adult?

40–60 mg/dL
70–99 mg/dL (Correct answer)
100–125 mg/dL
126–180 mg/dL

Correct answer: 70–99 mg/dL

Normal fasting blood glucose is 70–99 mg/dL; values of 100–125 indicate prediabetes, and 126+ on two occasions indicate diabetes.

Question 5: Which test is the standard for monitoring long-term blood sugar control in diabetic patients?

Fasting glucose
Random glucose
HbA1c (Hemoglobin A1c) (Correct answer)
Urine glucose dipstick

Correct answer: HbA1c (Hemoglobin A1c)

HbA1c reflects average blood glucose over the past 2–3 months by measuring glycated hemoglobin, making it the gold standard for long-term diabetes management.

Question 6: When a scribe documents 'STAT' for a lab order, what does this indicate?

Standard time and testing protocol
Send specimen to another facility
Immediately/urgently needed (Correct answer)
Schedule for tomorrow morning

Correct answer: Immediately/urgently needed

STAT derives from the Latin 'statim,' meaning immediately, and indicates the lab test is urgent and must be processed right away.

Question 7: Which liver function test (LFT) is most specific for hepatocellular (liver cell) damage?

Total bilirubin
Alkaline phosphatase (ALP)
Alanine aminotransferase (ALT) (Correct answer)
Gamma-glutamyl transferase (GGT)

Correct answer: Alanine aminotransferase (ALT)

ALT is found primarily in liver cells and rises significantly when hepatocytes are injured, making it the most specific LFT for liver cell damage.

Question 8: What does INR (International Normalized Ratio) measure, and why is accurate documentation critical for a medical scribe?

Kidney filtration rate; monitors renal failure
Blood clotting time; monitors patients on anticoagulants like warfarin (Correct answer)
Inflammation level; monitors autoimmune disease
Red blood cell production; monitors anemia

Correct answer: Blood clotting time; monitors patients on anticoagulants like warfarin

INR measures blood clotting time and is essential for monitoring patients on anticoagulant therapy such as warfarin to prevent dangerous bleeding or clotting events.

Question 9: A urinalysis report showing '3+' for protein indicates which of the following?

Normal protein levels within reference range
Trace protein, clinically insignificant
Significant proteinuria warranting further evaluation (Correct answer)
The specimen was dilute and the test was inconclusive

Correct answer: Significant proteinuria warranting further evaluation

A '3+' proteinuria result indicates a significant amount of protein in the urine, which can signal kidney disease, nephrotic syndrome, or other conditions requiring follow-up.

Question 10: Which imaging modality uses magnetic fields and radio waves rather than ionizing radiation?

CT scan
Plain X-ray
PET scan
MRI (Correct answer)

Correct answer: MRI

MRI (Magnetic Resonance Imaging) uses magnetic fields and radio frequency waves, making it free of ionizing radiation unlike CT scans or X-rays.

Question 11: When documenting a culture result, 'NGTD' typically stands for what?

No growth to date (Correct answer)
Negative gram-type diagnosis
Non-group throat disease
Normal growth, typical development

Correct answer: No growth to date

'NGTD' means No Growth To Date, indicating that no bacteria have grown in the culture at the time of the interim report.

Question 12: A troponin level is ordered primarily to assess damage to which organ?

Liver
Kidney
Heart (Correct answer)
Pancreas

Correct answer: Heart

Troponin is a cardiac-specific protein released into the bloodstream when heart muscle cells are damaged, and it is the gold standard biomarker for diagnosing myocardial infarction.

Question 13: Which test is most commonly used to screen for colorectal cancer through stool analysis?

Fecal occult blood test (FOBT) (Correct answer)
Stool culture
Ova and parasite (O&P) test
C. difficile toxin assay

Correct answer: Fecal occult blood test (FOBT)

The Fecal Occult Blood Test detects hidden (occult) blood in stool, which can be an early indicator of colorectal cancer or precancerous polyps.

Question 14: When a provider orders a 'type and screen,' what is being requested?

A complete metabolic panel and urinalysis
Blood typing (ABO/Rh) and screening for unexpected antibodies (Correct answer)
A thyroid function panel
A urine toxicology screen

Correct answer: Blood typing (ABO/Rh) and screening for unexpected antibodies

A type and screen determines the patient's ABO blood group and Rh factor while screening for unexpected red blood cell antibodies prior to potential transfusion.

Question 15: What does a lab result status of 'pending' mean when documented by a medical scribe?

The result has been finalized and reviewed by the provider
The specimen was rejected and must be recollected
The test has been ordered but results are not yet available (Correct answer)
The test was cancelled by the ordering provider

Correct answer: The test has been ordered but results are not yet available

'Pending' indicates that the laboratory test has been ordered and the specimen submitted, but results have not yet been reported by the lab.

Question 16: Which value in a complete metabolic panel (CMP) directly reflects the body's primary circulating energy source?

Sodium
Glucose (Correct answer)
Creatinine
Albumin

Correct answer: Glucose

Glucose in a CMP reflects the current blood sugar level, which is the body's primary and most immediately available source of cellular energy.

Question 17: When documenting a chest X-ray report that states 'No acute cardiopulmonary process,' what does this mean?

There is a serious cardiac abnormality requiring urgent intervention
The lungs show signs of pneumonia
No urgent or new heart or lung abnormality was detected (Correct answer)
The X-ray was of insufficient quality to interpret

Correct answer: No urgent or new heart or lung abnormality was detected

'No acute cardiopulmonary process' is standard radiologist language indicating no urgent or new abnormalities affecting the heart or lungs were identified.

Question 18: An adult WBC count of 14,000 cells/µL would most likely indicate which of the following?

Anemia
Thrombocytopenia
Infection or systemic inflammation (Correct answer)
Hepatic dysfunction

Correct answer: Infection or systemic inflammation

The normal adult WBC range is approximately 4,500–11,000 cells/µL; an elevated count (leukocytosis) commonly reflects infection, inflammation, or stress response.

Question 19: Which electrolyte imbalance is documented when a patient's serum potassium level falls below 3.5 mEq/L?

Hyperkalemia
Hypokalemia (Correct answer)
Hypernatremia
Hyponatremia

Correct answer: Hypokalemia

Hypokalemia refers to abnormally low potassium levels (below 3.5 mEq/L), which can cause muscle weakness, cramps, and dangerous cardiac arrhythmias.

Question 20: When documenting an ECG result, what does the abbreviation 'NSR' indicate?

Non-specific rhythm abnormality
Normal sinus rhythm (Correct answer)
New subendocardial response
Narrow systolic rate

Correct answer: Normal sinus rhythm

NSR stands for Normal Sinus Rhythm, meaning the heart's electrical activity originates from the sinoatrial node at a normal rate and regular pattern.

Question 21: A D-dimer test is primarily ordered to help rule out which condition?

Iron-deficiency anemia
Diabetes mellitus
Pulmonary embolism or deep vein thrombosis (Correct answer)
Acute liver failure

Correct answer: Pulmonary embolism or deep vein thrombosis

D-dimer is a fibrin degradation product elevated when blood clots form and break down; it is a key screening test for ruling out pulmonary embolism and DVT.

MS Laboratory & Diagnostic Testing

What does CBC stand for in medical documentation?

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