CCMA · Medical Law and Ethics · 6 min read
Informed Consent, Implied Consent and Consent for Minors
- Differentiate between informed consent, expressed consent, and implied consent in outpatient clinical practice.
- Define the clinical medical assistant's responsibilities when witnessing consent, verifying documentation, and responding to patient refusal.
- Identify legal and ethical consent standards for minors and adult patients who lack decision-making capacity.
Principles of Informed Consent and the Medical Assistant's Role
Informed consent is the process where a healthcare provider explains the risks, benefits, and alternatives of a procedure before the patient agrees to it. The provider performing the procedure is responsible for conducting this informed consent discussion. The clinical medical assistant does not explain the procedure's risks and alternatives on the provider's behalf, nor can the assistant independently explain surgical techniques or prognoses to a patient. Informed consent requires explaining the patient's diagnosis and the nature of the proposed intervention so the individual understands what is planned.
A complete informed consent discussion also requires informing the patient of known risks and potential complications of a procedure. In addition, the provider must discuss available alternative treatments and their associated risks, as well as the potential prognosis and risks if the patient refuses the procedure. For consent to be valid, a patient must give informed consent voluntarily without coercion or undue influence. The individual must have decision-making capacity and legal authority to consent, or an authorized representative must provide consent.
Written informed consent is generally required for surgery and for other procedures specified by applicable law or clinic policy; routine blood draws and injections do not generally require a signed informed-consent form. A written consent form should identify the patient and proposed procedure and include the dates and signatures required by applicable law and clinic policy. Before assisting with a procedure that requires written consent, the medical assistant should check that the required signed form is in the medical record and notify the provider if it is missing.
A medical assistant cannot conduct the informed consent discussion, but may help document consent or witness a signature after the provider has discussed the procedure with the patient. When acting as a witness to the patient's signature on a consent form, the medical assistant verifies the signer's identity and witnesses the signature; witnessing does not certify that the patient understands the procedure. If a patient expresses confusion or asks questions about procedure risks, the medical assistant must notify the provider. If a patient has unresolved questions about a procedure, the medical assistant must alert the provider and not assist with the procedure until the provider addresses them. After the provider has finished the discussion, the medical assistant may reinforce post-procedure care instructions previously explained by the provider.
Common mistakes
- Explaining procedure risks, alternative treatments, or surgical techniques to a confused patient instead of referring them back to the provider.
- Assuming that witnessing a consent form certifies that the patient understands the clinical intervention, rather than merely verifying the signer's identity and witnessing their signature.
- Continuing a delegated clinical task after a patient verbally withdraws consent or asks you to stop.
- Allowing an adult relative or stepparent to consent for a minor without verifying clinic policy, written parental authorization, or legal guardianship documents.
Key points
- Informed consent requires the performing provider to discuss the diagnosis, proposed intervention, risks, complications, alternatives, and refusal prognosis before the patient agrees voluntarily.
- The medical assistant cannot conduct informed consent discussions or independently explain surgical techniques, but may reinforce post-procedure care instructions previously explained by the provider.
- As a witness on a consent form, the medical assistant only verifies the signer's identity and witnesses the signature, and must confirm that a completed form is in the chart prior to the procedure.
- Expressed consent is explicitly spoken or written, whereas implied consent is inferred from actions like offering an arm or applies to unconscious patients during life-threatening emergencies.
- Competent adult patients may refuse care or revoke consent at any time; medical assistants must stop when safe, document the refusal in the chart, and notify the supervising provider.
- Minors generally require parental or guardian consent, but exceptions include emancipation, the mature minor doctrine, emergency implied consent, and state-permitted services like STI or reproductive care.
- When an adult patient lacks decision-making capacity, the medical assistant checks for legal guardianship or healthcare power-of-attorney documents and alerts the provider before proceeding.
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