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2.4 Medical Law & Ethics

Key Takeaways

  • Medical assistants work under the direct supervision of a licensed physician and must stay within their scope of practice

  • Informed consent requires explaining the procedure, risks, benefits, alternatives, and right to refuse before treatment

  • The four Ds of medical malpractice are: Duty, Dereliction (breach), Direct cause, and Damages

  • Respondeat superior ("let the master answer") means the employer is legally responsible for employees' actions within their scope

  • OSHA sets workplace safety standards; non-compliance can result in fines and legal action

  • The Patient Bill of Rights includes the right to informed consent, privacy, refusal of treatment, and access to medical records

  • Advance directives include living wills and durable power of attorney for healthcare (DPOA-HC)

  • Mandatory reporting requirements include suspected child/elder abuse, communicable diseases, and certain injuries (gunshot wounds, stab wounds)

  • The AMA Code of Ethics and AMT Standards of Practice guide professional conduct for medical assistants

Last updated: February 2026

Medical law and ethics questions on the RMA exam test your understanding of legal principles, scope of practice, patient rights, and ethical standards that govern medical assistant practice.


Scope of Practice

Medical assistants perform tasks under the direct supervision of a licensed physician. Understanding what you CAN and CANNOT do is critical:

Medical Assistants CAN:

  • Take vital signs and patient histories
  • Perform clinical procedures as directed (injections, phlebotomy, ECGs)
  • Prepare patients for examinations
  • Administer medications as ordered by the physician
  • Process insurance claims and medical records
  • Educate patients using physician-approved materials
  • Perform CLIA-waived laboratory tests

Medical Assistants CANNOT:

  • Diagnose conditions or diseases
  • Prescribe medications or treatments
  • Interpret test results for patients (relay results as directed by physician)
  • Practice independently without physician supervision
  • Perform procedures outside of training and state regulations

Medical Malpractice: The 4 Ds

For a malpractice claim to succeed, ALL FOUR elements must be proven:

ElementDefinitionExample
DutyA physician-patient relationship existedPatient had an appointment at the practice
Dereliction (Breach)The standard of care was violatedMA administered wrong dose of medication
Direct CauseThe breach directly caused the injuryThe wrong dose caused an adverse reaction
DamagesThe patient suffered actual harmPatient required hospitalization due to the reaction

Key Legal Concepts

ConceptDefinition
Respondeat superior"Let the master answer" -- employer is liable for employee's actions within scope of employment
Res ipsa loquitur"The thing speaks for itself" -- negligence is obvious (e.g., surgical sponge left in patient)
Standard of careThe level of care a reasonably competent healthcare provider would deliver in similar circumstances
Statute of limitationsTime limit for filing a malpractice lawsuit (varies by state, typically 1-3 years)
Informed consentLegal requirement to explain procedure, risks, benefits, alternatives, and right to refuse
Implied consentPatient's actions indicate consent (e.g., rolling up sleeve for blood draw)
Express consentWritten or verbal agreement to treatment
AssaultThreatening to harm a patient (verbal or physical threat)
BatteryTouching a patient without consent or exceeding the scope of consent
AbandonmentTerminating the physician-patient relationship without proper notice and transfer of care

Informed Consent Requirements

For consent to be legally valid, the patient must be informed of:

  1. Nature of the procedure: What will be done
  2. Risks: Potential complications and side effects
  3. Benefits: Expected outcomes
  4. Alternatives: Other treatment options available (including no treatment)
  5. Right to refuse: Patient can decline without penalty
  6. Opportunity for questions: Patient must have time to ask questions

Who obtains informed consent? The physician obtains informed consent, NOT the medical assistant. The MA may witness the signature and verify the form is completed, but the physician is responsible for the discussion with the patient.

Advance Directives

TypeDescription
Living willWritten document stating the patient's wishes for medical treatment if they become incapacitated
Durable Power of Attorney for Healthcare (DPOA-HC)Designates another person to make medical decisions if the patient cannot
Do Not Resuscitate (DNR)Orders that CPR should NOT be performed if the patient's heart stops
POLST/MOLSTPhysician/Medical Orders for Life-Sustaining Treatment; specific medical orders

Mandatory Reporting

Medical assistants and other healthcare workers are mandated reporters required by law to report:

  • Suspected child abuse or neglect
  • Suspected elder abuse or neglect
  • Communicable/infectious diseases (HIV, TB, hepatitis, STIs -- varies by state)
  • Gunshot wounds and stab wounds
  • Dog bites and animal bites
  • Births and deaths
  • Workplace injuries (workers' compensation)
Test Your Knowledge

The legal doctrine of respondeat superior means:

A

The patient is responsible for their own health decisions

B

The physician must personally perform all procedures

C

The employer is legally responsible for employees' actions within their scope of work

D

Medical assistants can practice independently under this doctrine

Test Your Knowledge

Who is legally responsible for obtaining informed consent from a patient before a procedure?

A

The medical assistant

B

The office manager

C

The physician

D

The patient

Test Your Knowledge

Which of the following would a medical assistant be required to report as a mandated reporter?

A

A patient who admits to smoking cigarettes

B

A child with unexplained bruises in various stages of healing

C

A patient who refuses to take prescribed medication

D

A patient who misses a scheduled follow-up appointment

Test Your Knowledge

The four elements required to prove medical malpractice (the "4 Ds") are:

A

Duty, Diagnosis, Damages, Documentation

B

Duty, Dereliction, Direct cause, Damages

C

Duty, Disclosure, Direct cause, Defense

D

Diagnosis, Dereliction, Disclosure, Damages

Test Your Knowledge
Multi-Select

Which of the following are components of legally valid informed consent? (Select all that apply)

Select all that apply

Nature of the procedure

Insurance coverage details

Risks and potential complications

Alternative treatment options

Cost of the procedure

Patient's right to refuse

Test Your Knowledge
Matching

Match each legal term with its correct definition.

Match each item on the left with the correct item on the right

1

Battery

2

Assault

3

Abandonment

4

Implied consent

5

Statute of limitations

Sections you finish are checked off in the contents.