This is an interlocutory appeal from a district court order granting defendant's motion to disqualify plaintiffs trial counsel from further representation in the underlying action. The appeal presents two questions: whether an order disqualifying counsel is a "final decision" appealable under 28 U.S.C. Sec. 1291 and, if so, whether the district court's order was reasonable under the circumstances presented in this case. We conclude that the order is immediately appealable and affirm.

The facts in this case, which we draw from the parties' filings in the district court, need only brief exposition. In early 1979, the plaintiff, Eleanor Groper, her sister, Miriam Birnbach, and her niece, Jami Birnbach, informally established a small knitted sweater business. With some initial financial success, the women decided to incorporate and sought advice from defendant Silver, who apparently was a family friend and attorney to Miriam Birnbach's husband. The three women met with defendant Taff, a member of Silver's law firm, to discuss the incorporation and Taff subsequently incorporated the business, designating Jami Birnbach as its sole director and stockholder.

Although the enterprise continued to prosper, disputes soon arose among the principals concerning the operation of the business. In May of 1981, the women met with Silver, this time in an effort to iron out their disagreements. These efforts proved unsuccessful and there apparently was talk of dissolving the corporation. Groper alleges in her complaint that at this time Jami Birnbach, with the advice and consent of the defendants, seized control of the corporation and its assets.

Sometime during this period, Groper retained Evan Lawson to represent her. Throughout the summer of 1981, the principals--through attorneys Taff and Lawson--searched for a negotiated settlement. When these efforts failed, Groper filed suit in district court against Taff and Silver, alleging, inter alia, that they breached their fiduciary duty to the business by representing Jami Birnbach individually at the time of incorporation and during that summer's efforts to negotiate a settlement. Taff and Silver answered the complaint by asserting the affirmative defenses of estoppel, waiver, and ratification. In particular, they alleged that Groper should have known of Taff's representation of Jami Birnbach because Taff had so informed Lawson early on in the negotiations. The defendants subsequently asked the district court to disqualify Lawson as Groper's counsel on the ground that Lawson will likely be called as a witness on Groper's behalf to rebut Taff's allegations. See ABA MODEL CODE OF PROFESSIONAL RESPONSIBILITY, Disciplinary Rule (DR) 5-102(A) (1981). The district court agreed and disqualified Lawson and his firm from further representation of Groper in the suit. Memorandum Opinion, Groper v. Taff, No. 81-3213 (D.D.C. May 10, 1983). Groper noted an appeal and asked that we stay proceedings in the district court pending disposition of the appeal.

Before addressing the merits of the district court's order, we must determine whether we have jurisdiction under 28 U.S.C. Sec. 1291 to review the order. Although the Supreme Court has conclusively determined that litigants may not take an immediate appeal from an order denying a motion to disqualify counsel, Firestone Tire & Rubber Co. v. Risjord, 449 U.S. 368, 101 S. Ct. 669, 66 L. Ed. 2d 571 (1981); cf. Community Broadcasting of Boston v. FCC, 546 F.2d 1022 (D.C.Cir.1976) (such orders may be reviewed under the All Writs Act, 28 U.S.C. Sec. 1651), the Court expressly reserved the question whether the grant of a disqualification motion is similarly unappealable. Firestone, supra, 449 U.S. at 372 n. 8, 101 S. Ct. at 672 n. 8.

We find, as have the other circuits which have considered this question after Firestone, that disqualification orders are immediately appealable under the collateral order doctrine. See, e.g., United States v. Agosto, 675 F.2d 965, 968 n. 1 (8th Cir.), cert. denied, --- U.S. ----, 103 S. Ct. 77, 74 L. Ed. 2d 74 (1982); United States v. Cunningham, 672 F.2d 1064, 1066 n. 1 (2d Cir.1982); United States v. Caggiano, 660 F.2d 184, 189 (6th Cir.1981), cert. denied, 454 U.S. 1149, 102 S. Ct. 1015, 71 L. Ed. 2d 303 (1982); In re Coordinated Pretrial Proceedings in Petroleum Products Antitrust Litigation, 658 F.2d 1355, 1356-57 (9th Cir.1981), cert. denied, 455 U.S. 990, 102 S. Ct. 1615, 71 L. Ed. 2d 850 (1982); Duncan v. Merrill Lynch, Pierce, Fenner & Smith, Inc., 646 F.2d 1020, 1024-27 (5th Cir.), cert. denied, 454 U.S. 895, 102 S. Ct. 394, 70 L. Ed. 2d 211 (1981). Although interlocutory orders ordinarily are not final for purposes of 28 U.S.C. Sec. 1291, they are reviewable under the collateral order doctrine of Cohen v. Beneficial Industrial Loan Corp., 337 U.S. 541, 69 S. Ct. 1221, 93 L. Ed. 1528 (1949), if they "conclusively determine the disputed question, resolve an important issue completely separate from the merits of the action, and [are] effectively unreviewable on appeal from a final judgment." Coopers & Lybrand v. Livesay, 437 U.S. 463, 468, 98 S. Ct. 2454, 2458, 57 L. Ed. 2d 351 (1978); see Cohen, supra, 337 U.S. at 546-47, 69 S. Ct. at 1225-26. Both grants and denials of motions to disqualify satisfy the first two Cohen criteria. See Firestone, supra, 449 U.S. at 375-76, 101 S. Ct. at 674-675. However, unlike orders denying disqualification, which the Supreme Court concluded failed to satisfy the collateral order doctrine because they are reviewable on appeal after final judgment, id. at 377, 101 S.Ct. at 675, an order granting disqualification in a civil case,1 is, as a practical matter, "effectively unreviewable" on appeal from a final judgment on the merits. See Duncan, supra, 646 F.2d at 1026-27.

Finding that we have jurisdiction to hear this appeal, we consider and affirm the district court's order.2 The district court disqualified Lawson from further representation in this suit pursuant to DR 5-102(A), which provides in relevant part that a "lawyer ... shall withdraw from the conduct of the trial and his firm, if any, shall not continue representation in the trial" if he knows or it is obvious that he ought to be called as a witness on his client's behalf.3 As the district judge observed, application of this rule does not depend on whether an attorney will be called but rather, as the Code provides, on whether he "ought to be called as a witness" in the underlying action. J.P. Foley & Co., Inc. v. Vanderbilt, 523 F.2d 1357, 1359 (2d Cir.1975); Norman Norell, Inc. v. Federated Department Stores, 450 F. Supp. 127, 129 (S.D.N.Y.1978).

The standard of review we apply in this case is one of abuse of discretion. See Fred Weber, Inc. v. Shell Oil Co., 566 F.2d 602, 605 (8th Cir.1977), cert. denied, 436 U.S. 905, 98 S. Ct. 2235, 56 L. Ed. 2d 403 (1978); Hull v. Celanese Corp., 513 F.2d 568, 571 (2d Cir.1975); Cossette v. Country Style Donuts, Inc., 647 F.2d 526, 530 (5th Cir.1981) (applying a "clearly erroneous" standard). Because the district court bears responsibility for supervising the members of its bar and its exercise of this supervisory duty is discretionary, we will disturb the court's findings only for abuse of discretion. Hull v. Celanese Corp., supra, 513 F.2d at 571.4

We cannot say that, under the circumstances presented in this case, the district judge abused his discretion in disqualifying Lawson. The judge could reasonably conclude, as he did, that Lawson ought to appear on Groper's behalf in presenting her prima facie case as well as in rebutting Taff's affirmative defenses and therefore that DR 5-102(A) required disqualification. Lawson's continued representation in this case would implicate two principal ethical considerations which underlie the disciplinary rule: Groper's case would be presented through the testimony of an obviously interested witness who is subject to impeachment on that account, and Lawson would be put in the unseemly position of arguing his own credibility. See ABA MODEL CODE OF PROFESSIONAL RESPONSIBILITY Canon 9 (1981); ABA Comm. on Ethics and Professional Responsibility, Formal Op. 339 (1975).

Nor do we find error in the district court's conclusion that the enumerated exceptions to the rule requiring disqualification are inapplicable in this case. The first three exceptions, dealing with uncontested testimony, formalities, and legal fees, clearly have no application. The fourth exception, which authorizes continued representation if an attorney's withdrawal "would work a substantial hardship on the client because of the distinctive value [of counsel] in the particular case," also is inapposite. This is a relatively straightforward civil case; neither the contested issues nor the factual background are particularly complex; and, as the district court emphasized, Groper has local counsel (Lawson was admitted pro hac vice ) who must be prepared at all times to go forward with the case. District Court Rule 1-4(a)(2). In fact, local counsel apparently represented Groper with regard to the subject matter of this case even before the suit was filed. Appellee's Opposition to Stay at 1.

Accordingly, we affirm.