New York Civil Practice Law and Rules § 3101. Scope of disclosure
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(a) Generally. There shall be full disclosure of all matter material and necessary in the prosecution or defense of an action, regardless of the burden of proof, by:
(1) a party, or the officer, director, member, agent or employee of a party;
(2) a person who possessed a cause of action or defense asserted in the action;
(3) a person about to depart from the state, or without the state, or residing at a greater distance from the place of trial than one hundred miles, or so sick or infirm as to afford reasonable grounds of belief that he or she will not be able to attend the trial, or a person authorized to practice medicine, dentistry or podiatry who has provided medical, dental or podiatric care or diagnosis to the party demanding disclosure, or who has been retained by such party as an expert witness; and
(4) any other person, upon notice stating the circumstances or reasons such disclosure is sought or required.
(b) Privileged matter. Upon objection by a person entitled to assert the privilege, privileged matter shall not be obtainable.
(c) Attorney's work product. The work product of an attorney shall not be obtainable.
(d) Trial preparation. 1. Experts. (i) Upon request, each party shall identify each person whom the party expects to call as an expert witness at trial and shall disclose in reasonable detail the subject matter on which each expert is expected to testify, the substance of the facts and opinions on which each expert is expected to testify, the qualifications of each expert witness and a summary of the grounds for each expert's opinion. However, where a party for good cause shown retains an expert an insufficient period of time before the commencement of trial to give appropriate notice thereof, the party shall not thereupon be precluded from introducing the expert's testimony at the trial solely on grounds of noncompliance with this paragraph. In that instance, upon motion of any party, made before or at trial, or on its own initiative, the court may make whatever order may be just. In an action for medical, dental or podiatric malpractice, a party, in responding to a request, may omit the names of medical, dental or podiatric experts but shall be required to disclose all other information concerning such experts otherwise required by this paragraph.
(ii) In an action for medical, dental or podiatric malpractice, any party may, by written offer made to and served upon all other parties and filed with the court, offer to disclose the name of, and to make available for examination upon oral deposition, any person the party making the offer expects to call as an expert witness at trial. Within twenty days of service of the offer, a party shall accept or reject the offer by serving a written reply upon all parties and filing a copy thereof with the court. Failure to serve a reply within twenty days of service of the offer shall be deemed a rejection of the offer. If all parties accept the offer, each party shall be required to produce his or her expert witness for examination upon oral deposition upon receipt of a notice to take oral deposition in accordance with rule thirty-one hundred seven of this chapter. If any party, having made or accepted the offer, fails to make that party's expert available for oral deposition, that party shall be precluded from offering expert testimony at the trial of the action.
(iii) Further disclosure concerning the expected testimony of any expert may be obtained only by court order upon a showing of special circumstances and subject to restrictions as to scope and provisions concerning fees and expenses as the court may deem appropriate. However, a party, without court order, may take the testimony of a person authorized to practice medicine, dentistry or podiatry who is the party's treating or retained expert, as described in paragraph three of subdivision (a) of this section, in which event any other party shall be entitled to the full disclosure authorized by this article with respect to that expert without court order.
(iv) [Eff. Feb. 17, 2014. Repealed eff. Feb. 17, 2014 by L.2013, c. 23, § 4, prior to subparagraph taking effect.] In an action for podiatric medical malpractice, a physician may be called as an expert witness at trial.
2. Materials. Subject to the provisions of paragraph one of this subdivision, materials otherwise discoverable under subdivision (a) of this section and prepared in anticipation of litigation or for trial by or for another party, or by or for that other party's representative (including an attorney, consultant, surety, indemnitor, insurer or agent), may be obtained only upon a showing that the party seeking discovery has substantial need of the materials in the preparation of the case and is unable without undue hardship to obtain the substantial equivalent of the materials by other means. In ordering discovery of the materials when the required showing has been made, the court shall protect against disclosure of the mental impressions, conclusions, opinions or legal theories of an attorney or other representative of a party concerning the litigation.
(e) Party's statement. A party may obtain a copy of his own statement.
(f) Contents of insurance agreement. A party may obtain discovery of the existence and contents of any insurance agreement under which any person carrying on an insurance business may be liable to satisfy part or all of a judgment which may be entered in the action or to indemnify or reimburse for payments made to satisfy the judgment. Information concerning the insurance agreement is not by reason of disclosure admissible in evidence at trial. For purpose of this subdivision, an application for insurance shall not be treated as part of an insurance agreement.
(g) Accident reports. Except as is otherwise provided by law, in addition to any other matter which may be subject to disclosure, there shall be full disclosure of any written report of an accident prepared in the regular course of business operations or practices of any person, firm, corporation, association or other public or private entity, unless prepared by a police or peace officer for a criminal investigation or prosecution and disclosure would interfere with a criminal investigation or prosecution.
(h) Amendment or supplementation of responses. A party shall amend or supplement a response previously given to a request for disclosure promptly upon the party's thereafter obtaining information that the response was incorrect or incomplete when made, or that the response, though correct and complete when made, no longer is correct and complete, and the circumstances are such that a failure to amend or supplement the response would be materially misleading. Where a party obtains such information an insufficient period of time before the commencement of trial appropriately to amend or supplement the response, the party shall not thereupon be precluded from introducing evidence at the trial solely on grounds of noncompliance with this subdivision. In that instance, upon motion of any party, made before or at trial, or on its own initiative, the court may make whatever order may be just. Further amendment or supplementation may be obtained by court order.
(i) In addition to any other matter which may be subject to disclosure, there shall be full disclosure of any films, photographs, video tapes or audio tapes, including transcripts or memoranda thereof, involving a person referred to in paragraph one of subdivision (a) of this section. There shall be disclosure of all portions of such material, including out-takes, rather than only those portions a party intends to use. The provisions of this subdivision shall not apply to materials compiled for law enforcement purposes which are exempt from disclosure under section eighty-seven of the public officers law.
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