OPINION BY
¶ 1 Appellants 1 file this appeal from the order entered in the Philadelphia County Court of Common Pleas, granting summary judgment in favor of Appellees, defendants in Appellants’ indemnification/contribution action. We affirm, finding that because no judicial determination of Appellees’ liability resulted from the underlying malpractice action on which this suit is based, Appellants were required to produce the expert reports necessary for a determination of whether Ap-pellees had been medically negligent.
¶ 2 In January of 1996, plaintiff Rosalyn Rios suffered a ruptured uterus and the consequent stillborn birth of her son at Appellant hospital where Appellees were residents. She and the child’s estate (original plaintiffs) filed a malpractice action against, inter alia, Appellant hospital, but did not name Appellees as defendants. 2 *471 On February 7, 2001, the original plaintiffs moved to join Appellees as defendants, but their motion was denied by order of March 19, 2001 on grounds that the statute of limitations had run. Nonetheless, the original plaintiffs conducted depositions of Appellees who also testified at trial as fact witnesses.
¶ 3 At the conclusion of trial in December of 2001, the jury returned a verdict in favor of plaintiffs in the amount of $650,000, a sum later reduced to $333,333.55 in settlement. On a special verdict slip which does not appear in the certified record of the malpractice action, the jury specifically found that Appellees, despite not having been party to the litigation, had been negligent in their care of Rios and her son. 3
¶4 In December of 2003, 4 Appellant hospital commenced suit seeking indemnity and contribution. Appellees’ motion for summary judgment was denied, but the trial court directed that Appellant produce expert reports. In an order of June 16, 2005, the court explained that because Appellees had not been party to the malpractice litigation, their negligence with respect to that cause of action must be demonstrated. In so doing, the court specified that Appellant was “limited to proving one or more of the same theories of medical malpractice as was presented during the trial of Rios, et al. v. GHS Parkview Hospital, et al.,.., and may present the same or different expert witnesses.” (Order of 6/16/05). The case was discontinued in December of 2005.
¶5 Five days prior to the discontinuance, Appellant hospital, this time in conjunction with Appellant insurer, commenced a second suit for indemnity and contribution, and submitted the expert reports from the malpractice action. Appel-lees moved for summary judgment, which the trial court granted after a hearing, and this appeal followed.
*472 ¶ 6 Appellants’ challenge to the court’s entry of summary judgment revolves around the necessity, which they contest, of expert reports. They contend that Ap-pellees’ negligence was specifically determined by the jury in the original action, adding that expert reports have never been required for indemnity and contribution actions. Appellants argue that, at a minimum, genuine issues of material fact existed at the time of Appellees’ summary judgment motion.
¶ 7 When addressing a challenge to a grant of summary judgment:
[A] reviewing court may disturb the order of the trial court only where it is established that the court committed an error of law or abused its discretion. In evaluating the trial court’s decision to enter summary judgment, we focus on the legal standard articulated in the summary judgment rule, Pa.R.C.P. 1035.2[]. The rule states that where there is no genuine issue of material fact and the moving party is entitled to relief as a matter of law, summary judgment may be entered. We will view the record in the light most favorable to the non-moving party, and all doubts as to the existence of a genuine issue of material fact must be resolved against the moving party.
Tyco Electronics Corp. v. Davis,
¶ 8 Our Supreme Court noted the standards for common law indemnity in
Builders Supply Co. v. McCabe,
The right of indemnity rests upon a difference between the primary and the secondary liability of two persons each of whom, is made responsible by the law to an injured party. It is a right which enures to a person who, without active fault on his own part, has been compelled, by reason of some legal obligation, to pay damages occasioned by the initial negligence of another, and for which he himself is only secondarily liable.
Id.
at 370 (emphasis removed). The proper inquiry for an indemnity claim is “whether the party seeking indemnity had any part in causing the injury.”
Sirianni v. Nugent Bros., Inc.,
¶ 9 Indemnity and contribution are available against any defendant, even one the original plaintiff did not sue.
Burch v. Sears, Roebuck & Co.,
¶ 10 Instantly, the trial court concluded that Appellees “were not found personally liable in the [original] action. [They] were not parties to the [original] action,” thus Appellants were required to produce expert opinions to prove Appellees’ negligence. (Trial Ct. Op., 2/20/07, at 4). The trial court’s conclusion is based upon the well-settled standard that “a medical malpractice plaintiff generally must produce the opinion of a medical expert to demonstrate the elements of his cause of action.”
Miller v. Sacred Heart Hosp.,
¶ 11 Appellants place great reliance on the notion that the jury found Appellees’ negligent in the malpractice action as evidenced by the special verdict sheet. We are not persuaded. Preliminarily, we note that the special verdict sheet from which the putative adjudication of Appellees’ negligence is derived is not of record in the negligence matter. The weight to be accorded it is not further improved either by the absence of any signature or date, or by the fact that it is not recorded as part of an official record or form. More significant, however, is the context of its creation: even assuming that the document could be construed as in some way authentic and/or authoritative, because Appellees were not party to the prior action, any finding of their liability for damages is void
ab initio. See Shay v. Flight C Helicopter Services, Inc.,
¶ 12 The fact that Appellees were not party to the malpractice action also neutralizes Appellants’ insistence that any variance between the outcome in that matter and in this is precluded either by
res judi-cata
or collateral estoppel. One of the mandatory elements of the former doctrine, not met here, is, by Appellants’ own account, “identity in the persons and parties to the action.” (Appellants’ Brief at 17) (citing
Gatling v. Eaton Corp.,
¶ 13 Moreover, where the defendants in a contribution action were not defendants in the original case, “the party seeking contribution must stand in the shoes of that original plaintiff and prove that the new defendant was a joint tortfeasor in that his tortious conduct also caused the harm at issue.”
Mattia v. Sears, Roebuck & Co.,
¶ 14 As to the efficacy of the expert reports which were submitted, there, too, Appellants’ contentions are not persuasive. The reports from the prior action, while finding the hospital staff in general negligent, failed to name Appellees. As the trial court noted, “Neither defendant ] in the instant litigation ... [was] specifically identified as having deviated from the standard of care in either report.” (Trial Ct. Op. at 1). The plaintiffs purpose in providing expert evidence is to establish the defendant’s actions as the source of his harm, as it is “[his] burden to prove that the harm suffered was due to the conduct of the defendant.”
Hamil v. Bashline,
the mere occurrence of an injury does not prove negligence and ... an admittedly negligent act does not necessarily entail liability; rather even when it is established that the defendant breached some duty of care owed the defendant, it is incumbent upon a plaintiff to establish a causal connection between defendant’s conduct and the plaintiffs injury.
Id.
(emphasis added). The causal connection may not be scattershot; rather, it is the specific conduct of the specific defendant which must be proven for liability to attach, that is, “[a]ny action in negligence is premised on the existence of a duty owed by one party to another.”
Gibbs v. Ernst,
¶ 15 For the foregoing reasons, no issues of material fact remain to allow Appellants to avoid the summary judgment properly entered by the trial court.
¶ 16 Order affirmed.
Notes
. MIIX Insurance Company is Appellant Hospital’s insurer.
. Appellants alleged that Appellees’ identities were unknown when the complaint was filed, *471 thus the Complaint listed John Doe (1) and (2) among the defendants. (See Complaint, filed 12/5/05, at 3).
. The relevant portions of the special verdict, as they appear in Appellants’ complaint here, stated:
Question # 1: Was Scott Epstein, D.O, an agent of GHS Parkview Hospital? [Answer: YES]
Question # 2[:] Was Renee Bender, D.O. an agent of GHS-Parkview Hospital? [Answer: YES]
Question # 3[:]. If you answered “yes” to Question # 1, was Dr. Epstein negligent when treating Roslyn Rios on January 14, 1996? [Answer: YES]
Question # 5: Was the negligence of Dr. Epstein a substantial factor in causing harm to Roslyn Rios? [Answer: YES]
Question # 6:.. If you answered "yes" to Question # 2, was Dr. Bender negligent when treating Roslyn Rios on January 14, 1996? [Answer: YES]
Question # 8: Was the negligence of Dr. Bender a substantial factor in causing harm to Roslyn Rios?
Question #16: If you find that one or more of the following are negligent and that their negligence was a substantial factor in causing harm to Roslyn Rios,
(a) Dr. Epstein or Dr. Bender
(b) Vanguard OB/GYN Associates
(b) Roslyn Rios
state the percentage of liability attributable to each party (the negligence of Dr. Epstein and/or Dr. Bender is to be attributed to GHS-Parkview Hospital). The total must add up to 100%.
GHS-Parkview Hospital 70%
Vanguard OB/GYN Associates 20%
Roslyn Rios 10%
(Civil Complaint, Exhibit B, filed Dec. 15, 2005).
. A similar action filed the previous April had been dismissed because the complaint lacked a properly signed verification.
. Theoretically, the same protection from a contribution action is not afforded them, since the statute does not begin to run on a claim for contribution until a judgment has been entered in favor of the original plaintiff. See Mattia, infra at 792.
. The indispensable nature of expert reports to support otherwise unproven claims of Ap-pellees’ negligence obviates any necessity to examine Appellants’ claim that the order of June 15, 2005, directing the submission of expert reports in the action brought by Appellant hospital, is of no effect in the instant case.
