Medical Assistant Terminology: Everything You Need to Know

Having a solid understanding of medical terminology is one of the essential skills of medical assistants to communicate effectively with other healthcare professionals and provide quality care to patients.

Common Medical Terminology

When it comes to common medical terms, there are 3 determining features.

Prefix – found at the beginning of a term
Suffix – located at the end of a term
Root word – helps identify what part of the body the condition refers to

Learning how these features operate will help medical assistants become proficient in using the common medical terms found in healthcare facilities.

Common Prefixes

A or An: means without
Anti: means against
Dis: meaning reversed or separated
Dys: refers to something being painful, difficult, or abnormal
Exo: meaning outside
Hyper: meaning excessive or high
Hypo: meaning below, or less than normal
Inter: meaning between
Intra: meaning inside
Para: meaning alongside
Poly: meaning many or a lot
Sub: meaning beneath

Common suffixes

-ectomy: refers to the surgical removal of a body part
-emia: refers to a blood condition
-itis: refers to inflammation of a body part
-pathy: refers to a disease or disorder
-phobia: refers to a psychological fear of a specific thing
-physis: refers to abnormal growth
-plegic: refers to partial or full paralysis
-ology: refers to the specific study or field of medicine
-oma: refers to a tumor or growth
-osis: refers to the abnormal condition or disease
-rrhage: meaning the excessive flow/discharge of fluid in or from the body
-thermic: relating to temperature
-tomy: refers to the cutting into a body part or organ

Common root words

Root words can appear at the beginning or in the middle of a term.

Common roots word include:

Arterio: artery
Carcino: cancer
Cardio: heart
Derm: skin
Gastro: stomach
Neuro: nerve
Osteo: bone
Cranio: skull
Adreno: adrenal glands
Arthro: joints
Pneumo: lung
Musculo: muscle

Basic anatomy and physiology terminology

Medial: towards the body’s midline
Lateral: away from the body’s midline
Anterior: in front
Posterior: at the back
Proximal: closer to the origin
Distal: further away from the origin
Superior: higher up
Inferior: lower down
Sagittal Plane: vertical line that divides the body into two equal sections (left and right)
Coronal Plane: verticle line that divides the body into front and back sections
Transverse Plane: horizontal line that divides the body into upper and lower sections

Common medical abbreviations

BMI: body mass index
BP: blood pressure
CBC: complete blood count
EKG/ECG: electrocardiogram
HBP: high blood pressure
HR: heart rate
MRI: magnetic resonance imaging
P: pulse
RR: respiratory rate
T: temperature
US: ultrasound
VS: vital signs

Specialized Medical Terminology

Depending on their place of work, there is medical assistant terminology that is specific to specialists (e.g dermatology, ophthalmology, cardiology). MAs who specialize in their medical assisting career will need to be familiar with the particular medical terms pertaining to their specialization.

Even if a medical assistant does not specialize, there will be times when more complex terminology will be used.

This includes terminology around:

medical instruments & equipment (e.g different clamps, forceps, sutures, etc.)
diagnostic & laboratory tests (e.g. sarcoma, polyp, benign, etc.)
medical procedures & surgical terms (e.g biopsy, bypass, skin graft, etc.)

Electronic Health Records Terminology

An electronic health record (EHR) is a digital file that contains the entire medical history of a patient. It stores important health information such as past illnesses, current conditions, prescribed medications, immunizations, and pathology test results.

EHRs also contain billing details and financial information that is essential for the insurance claims process. Inaccurate data could result in insurance claims being returned or denied which is costly for the health care provider.

Common EHR terminology includes:

Accountable care organizations
Allowable costs
Co-payment
Deductibles
Electronic data interchange
Health maintenance organizations
Health savings account
Lifetime limit
Out-of-pocket costs
Preferred provider organization

Communication in Healthcare

The top three successful components for a medical assistant to master is:

Active listening
Verbal communication
Nonverbal communication

Medical assistants need to act with the utmost professionalism when working with doctors and other healthcare personnel. This will help avoid miscommunications and errors in patient care.

When it comes to communicating with patients and family members, medical assistants have the acquired communication skills and vast technical knowledge needed to relay information from other medical professionals, address patient concerns, and educate on patient care.

Their role is crucial for making sure that patients feel listened to and well taken care of throughout their care journey.

Being mindful of the various communication barriers will help make medical assistants better communicators and avoid communication breakdowns.

There are several communication barriers to consider:

Physical
Biological/Physiological
Language
Emotional/Psychological
Cultural

To overcome any of these barriers, it is key for medical assistants to approach patients with empathy and compassion. They also need to tackle problems with critical thinking and creative problem-solving techniques.

Conclusion

There are many terms that a medical assistant needs to know to be effective at their job.

This is because medical assistant terminology makes up a large part of the essential communication skills needed to work as a medical assistant.

Mastering the various terms and using them correctly ensures the efficient transmission of information between all healthcare workers.

FAQs

What is the difference between ICD-10 and CPT codes?

Both codes are used in the billing part of healthcare but have slightly different meanings.

Current Procedural Terminology (CPT) is the main coding system used to bill insurance companies. Each CPT code has a corresponding monetary value for the medical procedure used in patient care. Insurance companies rely on CPT codes to process claims and determine expenses covered.

International Classification of Disease codes (ICD-10) is a globally recognized set of codes used by the World Health Organization that represents common diseases and disorders.

In medical billing, the ICD code is paired with the CPT code to indicate what diagnosis or condition the treatment is being billed for.

Knowing both sets of codes is essential for the administrative tasks that a medical assistant undertakes.

What is the most common medical abbreviation used by medical assistants?

Because medical assistants do the initial intake examination of a patient, their most commonly used terms would be related to checking a patient’s vital signs.

The two most common abbreviations used are BP for blood pressure and TRP for temperature, respiration (breathing), and pulse.

What are some common medical terms used in obstetrics and gynecology?

The most common medical terminology specifically related to obstetrics and gynecology are;

Breech: the feet first position of a fetus, instead of head first
Caesarian section (C/S, c-section): a surgical process to deliver a fetus through an incision in the lower abdomen
Cerclage: a surgical procedure where a suture is used to close the cervix to delay birth/avoid miscarriage
Dilation and curettage (D&C): a procedure used in surgical abortions or after a miscarriage where the cervix is widened and an instrument is inserted to remove the uterus lining
Eclampsia: a serious gestation condition where the patient suffers from hypertension. Extreme risk of coma, convulsions, and death.
Ectopic pregnancy: when a fertilized embryo implants into the fallopian tube instead of the uterus.
Episiotomy: a surgical procedure done during delivery where an incision is made to widen the vaginal to prevent muscle/skin tearing.
Endometriosis: a painful condition in which uterine lining tissue is found outside of the uterus in the ovaries, fallopian tubes, outer cervix, etc.
Hysterectomy: the surgical removal of the uterus. A total hysterectomy includes ovaries, fallopian tubes, and cervix.
Induction: the procedure to start labor, either done medically or surgically.
Preeclampsia: a serious condition where the mother experiences unusual hypertension, swelling, and proteinuria.

What is a SOAP note?

SOAP is an acronym for Subjective, Objective, Assessment, and Plan. It is a widely accepted format that healthcare workers use for collecting patient information.

It functions as a way to track the progress and recovery of a patient. It is done in such a manner that allows collaborative healthcare providers to read a patient’s chart without confusion.

What is HIPAA and how does it relate to medical terminology?

HIPAA refers to the Health Insurance Portability and Accountability Act of 1996, which is a U.S. federal law centered around the privacy of patient health information.

It ensures that any medical information cannot be shared with anyone unless it is done with the full consent of the patient.

HIPAA relates to medical terminology as it is the primary format and language in which private health information is recorded.

It also relates to the medical assisting field as it is MAs that are primarily responsible for collecting health information from patients. They must abide by the HIPAA act and make sure that they are not revealing any information (either voluntarily or involuntarily).

Sources

Medical terminology basics: what the words actually mean

Medical terminology looks overwhelming at first. Most terms come from Greek or Latin roots, and once you learn the roots, the words start to make sense. You do not need to memorize hundreds of random words. You need to learn the building blocks.

Every medical term has up to three parts: a prefix, a root, and a suffix. The root is the core meaning. The prefix comes before the root and changes or narrows the meaning. The suffix comes after the root and usually tells you what is happening, such as a condition, a procedure, or a type of cell.

For example, the word “cardiology” breaks down like this. “Cardi” is the root, meaning heart. “-ology” is the suffix, meaning the study of. Put them together and you get the study of the heart. Once you know those two parts, you also understand cardiologist, carditis, and cardiac without learning each word separately.

Common prefixes you will use every day

These prefixes appear constantly in clinical settings. Learning them now will save you real time later.

Brady-: slow. Bradycardia means a slow heart rate.
Tachy-: fast. Tachycardia means a fast heart rate.
Hyper-: above normal or excessive. Hypertension means blood pressure that is higher than normal.
Hypo-: below normal or deficient. Hypoglycemia means blood sugar that is lower than normal.
Peri-: around. Pericardium is the sac that surrounds the heart.
Sub-: under or below. Subcutaneous means beneath the skin.
Anti-: against. An antibiotic works against bacteria.
Inter-: between. Intercostal means between the ribs.

Common suffixes that describe conditions and procedures

Suffixes tell you what kind of term you are reading. A suffix that ends in “-itis” means inflammation. A suffix that ends in “-ectomy” means surgical removal. A suffix that ends in “-ology” means the study of something.

-itis: inflammation. Appendicitis is inflammation of the appendix.
-ectomy: surgical removal. An appendectomy removes the appendix.
-oscopy: visual examination using an instrument. A colonoscopy examines the colon.
-plasty: surgical repair or reconstruction. Rhinoplasty repairs or reshapes the nose.
-ology: the study of. Dermatology is the study of the skin.
-pathy: disease or disorder. Neuropathy refers to disease affecting the nerves.
-algia: pain. Myalgia means muscle pain.
-emia: a condition of the blood. Anemia means there are too few healthy red blood cells.

Body system terminology: a working reference

Medical assistants rotate through many tasks in a clinic. You take vital signs, prepare exam rooms, assist with procedures, and document patient information. Each of those tasks connects to one or more body systems, and each body system has its own vocabulary.

Cardiovascular and respiratory systems

The cardiovascular system moves blood through the body. The heart pumps blood through arteries, which carry blood away from the heart, and veins, which return blood to the heart. Capillaries are the smallest blood vessels, where the exchange of oxygen and nutrients happens at the tissue level.

Terms you will see regularly include:

Arrhythmia: an irregular heartbeat rhythm.
Myocardial infarction: commonly called a heart attack. The word “myocardial” means relating to the heart muscle, and “infarction” means tissue death caused by lack of blood supply.
Systolic pressure: the top number in a blood pressure reading. It measures pressure in the arteries when the heart beats.
Diastolic pressure: the bottom number. It measures pressure when the heart rests between beats.
Dyspnea: difficulty breathing. Patients often describe this as shortness of breath.
Edema: swelling caused by fluid collecting in body tissues.

Musculoskeletal system

The musculoskeletal system includes bones, muscles, tendons, and ligaments. Medical assistants often assist during orthopedic visits or help patients with mobility instructions.

Fracture: a break in a bone. A hairline fracture is a thin crack. A compound fracture breaks through the skin.
Sprain: stretching or tearing of a ligament, which connects bone to bone.
Strain: stretching or tearing of a muscle or tendon. A tendon connects muscle to bone.
Arthritis: inflammation of one or more joints. Osteoarthritis is wear-and-tear damage. Rheumatoid arthritis is an autoimmune condition.
Orthopedic: relating to the bones, joints, and muscles.

Digestive and urinary systems

The digestive system breaks down food and absorbs nutrients. The urinary system filters waste from the blood and removes it from the body.

Gastroesophageal reflux: stomach acid moving back into the esophagus. Patients often call this acid reflux or heartburn.
Nausea: the feeling of an urge to vomit.
Emesis: vomiting. You will see this word in clinical notes.
Urinalysis: a lab test that checks a urine sample for signs of infection, disease, or other issues.
Dysuria: painful or difficult urination.
Hematuria: blood in the urine. “Hemat” refers to blood.

Clinical abbreviations used in charting

Clinics and hospitals use abbreviations to document patient information quickly. As a medical assistant, you will read and write in charts daily. Learning these abbreviations is as important as learning the full terminology.

Abbreviations for vital signs and measurements

BP: blood pressure.
HR: heart rate, measured in beats per minute.
RR: respiratory rate, measured in breaths per minute.
Temp: body temperature.
SpO2: oxygen saturation measured by a pulse oximeter. A reading below 95% often warrants attention.
BMI: body mass index, a measure that compares weight to height.
Ht / Wt: height and weight.

Abbreviations for instructions and timing

These appear most often on medication orders and care instructions.

PRN: from the Latin “pro re nata,” meaning as needed.
QD or QDay: once daily. Some facilities avoid “QD” because it can be confused with other abbreviations.
BID: twice daily.
TID: three times daily.
QID: four times daily.
AC: before meals.
PC: after meals.
NPO: nothing by mouth. A patient listed as NPO should not eat or drink before a procedure.
STAT: immediately. When a provider says STAT, the task is urgent.

Abbreviations for patient status and location

CC: chief complaint, the main reason the patient came in.
Hx: history. “PMHx” means past medical history.
Dx: diagnosis.
Tx: treatment.
Rx: prescription.
SOB: shortness of breath.
N/V: nausea and vomiting.
DOE: dyspnea on exertion, meaning shortness of breath that appears during physical activity.

Anatomical positions and directional terms

When you document where something is on the body, you use standard directional terms. These terms mean the same thing no matter who reads the chart, which prevents confusion.

All directional terms assume the body is in the “anatomical position”: standing upright, facing forward, with arms at the sides and palms facing forward.

Directional terms and what they mean

Anterior: toward the front of the body. The chest is anterior to the spine.
Posterior: toward the back of the body. The spine is posterior to the chest.
Superior: above. The head is superior to the shoulders.
Inferior: below. The feet are inferior to the knees.
Medial: toward the midline of the body. The nose is medial to the ears.
Lateral: away from the midline. The ears are lateral to the nose.
Proximal: closer to the point where a limb attaches to the body. The shoulder is proximal to the elbow.
Distal: farther from the point of attachment. The fingers are distal to the wrist.
Bilateral: on both sides. Bilateral knee pain means both knees hurt.
Unilateral: on one side only.

Pharmacology terms for medical assistants

You will not prescribe medications, but you will handle them. You will prepare injections, document medications in charts, and answer patient questions about how to take a prescription. Knowing basic pharmacology vocabulary helps you do this accurately.

Routes of administration

A route of administration describes how a medication enters the body.

Oral (PO): taken by mouth and swallowed.
Sublingual (SL): placed under the tongue and absorbed through the mucous membrane.
Topical: applied to the skin surface.
Transdermal: absorbed through the skin, usually through a patch.
Intramuscular (IM): injected into muscle tissue.
Subcutaneous (SQ or SubQ): injected into the fatty tissue just below the skin.
Intravenous (IV): delivered directly into a vein.
Inhalation: breathed in through the mouth or nose, often through an inhaler or nebulizer.

Basic drug action terms

Indication: the condition or symptom a drug is approved to treat.
Contraindication: a reason not to give a drug. A patient with a penicillin allergy has a contraindication to penicillin.
Side effect: an unintended effect of a drug that occurs at normal doses.
Adverse reaction: a harmful or unexpected response to a drug. An adverse reaction is more serious than a typical side effect.
Dosage: the amount of a drug given at one time.
Therapeutic: related to treatment. A therapeutic dose is the amount needed to produce the desired effect.

How terminology connects to your day-to-day work

Medical terminology is not just something you study for a certification exam. You use it every time you read a chart, prepare a patient, or relay a message to a provider. Speaking the right language reduces errors and builds trust with the clinical team.

When a provider says a patient has “bilateral lower extremity edema,” you know they mean swelling in both legs. When you document that a patient’s chief complaint is “dyspnea on exertion,” every person who reads that chart understands it the same way. That clarity matters in a clinical environment where accuracy affects patient safety.

Terminology also helps during credentialing exams. Both the CMA exam offered through the American Association of Medical Assistants and the RMA exam offered through American Medical Technologists test your knowledge of medical terminology. A strong foundation here improves your score and your readiness to work.

Tips for building your vocabulary efficiently

Learn roots, prefixes, and suffixes first. Do not try to memorize full terms in isolation.
Use flashcards with the term on one side and the breakdown on the other. Write the prefix, root, and suffix separately.
Practice reading actual clinical notes. Many programs give you sample charts during training.
Group terms by body system. You will learn cardiovascular terms faster if you study them together rather than mixing them with digestive terms.
Say the terms out loud. Hearing yourself say “myocardial infarction” helps it stick in a different way than reading it silently.

Finding a program that covers terminology well

A good medical assistant program teaches terminology in context, not as a standalone memorization exercise. You want a program that weaves terminology into anatomy lessons, clinical skills labs, and externship preparation from the start.

Programs accredited by CAAHEP (the Commission on Accreditation of Allied Health Education Programs) or ABHES (the Accrediting Bureau of Health Education Schools) meet national quality standards. Graduates of accredited programs are eligible to sit for the CMA and RMA credentialing exams. If a program is not accredited by one of these bodies, check carefully before enrolling.

Most certificate programs run between nine months and one year. Associate degree programs typically take two years and include general education courses. Both paths can lead to an entry-level medical assistant position.

Ready to take the next step? Browse accredited medical assistant programs to find one that fits your schedule and goals. Comparing program length, accreditation status, and externship requirements now will save you time later.