(1) For purposes of this act, a claim based on the medical malpractice of a person or entity who is or who holds himself or herself out to be a licensed health care professional, licensed health facility or agency, or an employee or agent of a licensed health facility or agency who is engaging in or otherwise assisting in medical care and treatment, whether or not the licensed health care professional, licensed health facility or agency, or their employee or agent is engaged in the practice of the health profession in a sole proprietorship, partnership, professional corporation, or other business entity, accrues at the time of the act or omission that is the basis for the claim of medical malpractice, regardless of the time the plaintiff discovers or otherwise has knowledge of the claim. As used in this subsection:

    (a) “Licensed health facility or agency” means a health facility or agency licensed under article 17 of the public health code, Act No. 368 of the Public Acts of 1978, being section 333.20101 to 333.22260 of the Michigan Compiled Laws.

    (b) “Licensed health care professional” means an individual licensed or registered under article 15 of the public health code, Act No. 368 of the Public Acts of 1978, being section 333.16101 to 333.18838 of the Michigan Compiled Laws, and engaged in the practice of his or her health profession in a sole proprietorship, partnership, professional corporation, or other business entity. However, licensed health care professional does not include a sanitarian or a veterinarian.

    (2) Except as otherwise provided in this subsection, an action involving a claim based on medical malpractice may be commenced at any time within the applicable period prescribed in section 5805 or section 5851 to 5856, or within 6 months after the plaintiff discovers or should have discovered the existence of the claim, whichever is later. However, except as otherwise provided in section 5851(7) or (8), the claim shall not be commenced later than 6 years after the date of the act or omission that is the basis for the claim. The burden of proving that the plaintiff, as a result of physical discomfort, appearance, condition, or otherwise, neither discovered nor should have discovered the existence of the claim at least 6 months before the expiration of the period otherwise applicable to the claim is on the plaintiff. A medical malpractice action that is not commenced within the time prescribed by this subsection is barred. This subsection does not apply, and the plaintiff is subject to the period of limitations set forth in subsection (3), under 1 of the following circumstances:

    (a) If discovery of the existence of the claim was prevented by the fraudulent conduct of the health care professional against whom the claim is made or a named employee or agent of the health professional against whom the claim is made, or of the health facility against whom the claim is made or a named employee or agent of a health facility against whom the claim is made.

    (b) There has been permanent loss of or damage to a reproductive organ resulting in the inability to procreate.

    (3) An action involving a claim based on medical malpractice under circumstances described in subsection (2)(a) or (b) may be commenced at any time within the applicable period prescribed in section 5805 or section 5851 to 5856, or within 6 months after the plaintiff discovers or should have discovered the existence of the claim, whichever is later. The burden of proving that the plaintiff, as a result of physical discomfort, appearance, condition or otherwise, neither discovered nor should have discovered the existence of the claim at least 6 months before the expiration of the period otherwise applicable to the claim is on the plaintiff. A medical malpractice action that is not commenced within the time prescribed by this subsection is barred.