This case involves Hugo Diaz’s pursuit of long-term benefits under his company’s group insurance disability plan. Prudential Insurance Company of America, the plan’s underwriter, denied Diaz’s application, both initially and through several rounds of appeal. Diaz turned to the courts, but the district court concluded that the plan gave the administrator discretionary authority to determine participant eligibility. It therefore reviewed Prudential’s decision under the deferential “arbitrary and capricious” standard and concluded that Prudential was entitled to summary judgment. We conclude that deferential review was not appropriate given the language of this plan and thus remand for further proceedings.
I
Diaz began working in 1998 as a computer programmer analyst at Bank One in Chicago. As a Bank One employee, he participated in a group disability insurance *636 plan under-written by Prudential. The plan included a long-term disability component (LTD Plan) that provided benefits to a participant who was unable to perform the essential functions of his or her regular occupation as a result of an injury or illness.
In 2000, Diaz began experiencing persistent lower back pain and was diagnosed with degenerative disc disease and radicu-lopathy. For about two years, he underwent a series of non-operative medical treatments that included lumbar epidural steroid injections, physical therapy, and pain medication. Because his condition was not improving and he was in considerable pain, he stopped working on January 31, 2002. On February 4, on the recommendation of his physician, Diaz underwent a lumbar fusion procedure with hardware implantation to correct an annular tear at the lumbosacral joint, or L5-S1. Although postoperative examinations showed that the hardware alignment was satisfactory and there were no neurological deficits in his lower extremities, Diaz continued to report varying levels of pain in his back and legs. At times, Diaz reported that he felt hardware movement in his back, but each time he had this checked out, X-rays revealed that no movement had occurred and that the fusion was consolidating satisfactorily. After months of ineffective physical therapy and pain medication, he decided that he could not return to work.
Diaz submitted a claim for benefits under the LTD Plan on July 22, 2002, alleging that the back pain had rendered him disabled as of February 4, 2002. He supported his application with several doctors’ notes expressing the opinion that Diaz’s condition prevented him from sitting for more than fifteen to twenty minutes. Prudential denied the claim on August 27, for the stated reason that Diaz’s reported inability to perform his job (which it considered a sedentary one) was not consistent with the medical evidence. Diaz sought reconsideration of the rejection on October 22 and submitted additional medical evidence in support of his claim, but Prudential upheld its negative decision on January 22, 2003. Diaz then filed a second appeal on February 4. This time, Prudential submitted Diaz’s medical documentation to its medical consultant, Dr. Gale Brown, for review. Although Dr. Brown did not personally examine Diaz, he opined based on Diaz’s medical records that the clinical and diagnostic evidence relating to Diaz’s lumbar spine condition did not support Diaz’s reports of persistent pain. He concluded that Diaz’s condition did not prevent him from performing his job on a full-time basis. Dr. Brown noted, however, that there were non-physical factors that were having an adverse impact on Diaz’s ability to engage in gainful employment, including his anxiety over losing his job, depression, and opioid dependency, but Diaz was not seeking benefits on any of those bases. On April 16, 2003, Prudential again upheld its decision denying Diaz benefits.
Diaz filed this action in district court on April 22, 2003, under § 502(a)(1)(B) of the Employee Retirement Income Security Act of 1974 (ERISA), 29 U.S.C. § 1132(a)(1)(B), seeking an award of benefits under the LTD Plan. On May 12, 2004, the district court granted summary judgment in favor of Prudential, finding that Prudential’s denial of benefits was not arbitrary or capricious. On appeal, Diaz contends that the court should have reviewed Prudential’s decision de novo. In the alternative, he asserts that Prudential’s decision is unsupportable even under the deferential standard of review and urges this court to award benefits.
II
The Supreme Court has held that “a denial of benefits challenged under
*637
§ 1132(a)(1)(B) is to be reviewed under a
de novo
standard unless the benefit plan gives the administrator or fiduciary discretionary authority to determine eligibility for benefits or to construe the terms of the plan.”
Firestone Tire & Rubber v. Bruch,
Herzberger holds that the critical question is notice: participants must be able to tell from the plan’s language whether the plan is one that reserves discretion for the administrator. We concluded that:
[the] mere fact that a plan requires a determination of eligibility or entitlement by the administrator, or requires proof or satisfactory proof of the applicant’s claim, or requires both a determination and proof (or satisfactory proof), does not give the employee adequate notice that the plan administrator is to make a judgment largely insulated from judicial review by reason of being discretionary.
Herzberger,
Instead, plan documents must go further. If a plan wishes to insulate its decision to deny benefits from plenary review, the surest way to do so (at least in this Circuit) is by including language that either mimics or is functionally equivalent to the “safe harbor” language we have suggested: “Benefits under this plan will be paid only if the plan administrator decides in his discretion that the applicant is entitled to them.”
Herzberger,
In the final analysis, a plan must indicate “with the requisite if minimum clarity
*638
that a discretionary determination is envisaged.”
Id.
But what is that minimum point? One could imagine an almost infinite set of verbal formulations, and our prior cases have approached this question by drawing very fine linguistic lines. Thus, for example, the plan in
Donato v. Metropolitan Life Insurance Co.,
Prudential argues that its plan is functionally identical to the ones in Donato and Bali Agreeing with it, the district court found that two sections of the LTD Plan, taken together, support a finding of discretion. The first appears in a section entitled “How does Prudential Define Disability?”, which says “You are disabled when Prudential determines that: you are unable to perform the material and substantial duties of your regular occupation due to your sickness or injury; and you have 20% or more loss in your indexed monthly earnings due to that sickness or injury.” (Emphasis added.) The second is in the section addressing “Long Term Disability Coverage — Claim Information,” which states “[w]e may request that you send proof of continuing disability, satisfactory to Prudential, indicating that you are under the regular care of a doctor.” (Emphasis added.) The district court thought, not unreasonably, that the phrase “satisfactory to Prudential” was legally equivalent to the “satisfactory to us” language in Bali and Donato, and thus that the same outcome followed: review under Bruch’s deferential standard.
The problem with the district court’s analysis is not something for which that court bears full responsibility. The court correctly recognized that
Donato
and
Bali
point in the direction it took. Indeed, it might have added that a number of other circuits also appear to seize on the phrase “satisfactory
to us ”
as a way of making the cut that
Bruch
demands. See,
e.g., Brigham v. Sun Life of Canada,
Donato
and
Bali
are not, however, the last word on the subject from this court. As we have already noted,
Herzberger
took
*639
a significantly different approach when it held that a requirement that the administrator determine eligibility, or that proof or satisfactory proof must be tendered before benefits will be given, does not give the employee adequate notice that “the plan administrator is to make a judgment largely insulated from judicial review by reason of being discretionary.”
No single phrase such as “satisfactory to us” is likely to convey enough information to permit the employee to distinguish between plans that do and plans that do not confer discretion on the administrator. And this is a matter that may well be of interest to employees considering where to work: some may prefer the certainty of plans that do not confer discretion on administrators, while others may think that the lower costs that are likely to attend plans with reserved discretion are worth it. We must therefore ask what must be satisfactory to the plan’s administrator: did the evidence comply with prescribed standards (i.e., no discretion), or did the evidence comply with the plan administrator’s subjective notions of eligibility, disability, or other terms in the plan (ie., discretion). Prudential’s LTD Plan requires “proof of continuing disability, satisfactory to Prudential, indicating that [the claimant is] under the regular care of a doctor.” This language does not alert the plan participant to the possibility that Prudential has the power to re-define the entire concept of disability, or regularity of physician care, on a case-by-case basis. Fairly read, it suggests only that the plan participant must submit reliable proof of two things: continuing disability and treatment by a doctor. In short, under Prudential’s Plan, the only discretion reserved is the inevitable prerogative to determine what forms of proof must be submitted with a claim— something that an administrator in even the most tightly restricted plan would have to do.
In keeping with Herzberger, we conclude that the critical question is whether the plan gives the employee adequate notice *640 that the plan administrator is to make a judgment within the confines of pre-set standards, or if it has the latitude to shape the application, interpretation, and content of the rules in each case. The Prudential Plan here falls under the former category, and thus the district court should have reviewed its application de novo. To the extent that the test applied in Donato and Bali is inconsistent with the approach we are now articulating, we hereby disapprove the former two cases. Because we are changing the way in which we ascertain the proper standard of review, we have circulated this opinion to all active judges under Circuit Rule 40(e). No judge voted to hear the ease m banc. 1
Ill
The judgment of the district court is REVERSED and this case is RemaNDEd for further proceedings consistent with this opinion.
Notes
. Circuit Judge Rovner took no part in the consideration or vote on the Rule 40(e) circulation.
