MSPB Discovery in Disability Retirement Appeals: What You Can Request

Discovery Changes the Game at MSPB

If your FERS disability retirement was denied by OPM twice — once at the initial level and once on reconsideration — and you've appealed to the Merit Systems Protection Board, you now have something you didn't have before: formal discovery rights.

At OPM, you submit evidence and wait for a paper review. You never see OPM's internal analysis. You don't know what their medical officer actually thought about your physician's statement. You can't question anyone about the reasoning behind the denial.

At the MSPB, all of that changes. Under 5 CFR 1201.71–1201.75, both parties — you and OPM — can engage in formal discovery. This is the first point in the process where you can compel OPM to hand over documents and answer questions under oath.

The Four Discovery Tools Available to You

1. Requests for Production of Documents

You can compel OPM to produce its complete file on your case, including internal memoranda, medical officer notes, and any correspondence about your application. While OPM submits the "Rule 4(b) file" (the administrative record) at the start of the appeal, that file may not include everything. Your request for production can target:

• The OPM medical officer's complete evaluation notes — not just the summary in the denial letter
• Internal communications between the claims examiner and the medical officer
• Any medical literature or reference materials the medical officer relied on
• Agency personnel files that OPM may have received but didn't include in the Rule 4(b) file

2. Interrogatories

Written questions that OPM must answer under oath. These are particularly useful for pinning down the exact reasoning behind a denial. Effective interrogatories might ask:

• What specific diagnostic criteria did the medical officer apply when evaluating the applicant's physician statement?
• Did the medical officer review the complete set of medical records submitted, and if not, which records were not reviewed?
• What medical literature supports the conclusion that the applicant's condition does not meet the duration requirement?
• What alternative positions did OPM consider available for reassignment?

Interrogatories force OPM to commit to specific factual assertions that you can challenge at the hearing.

3. Requests for Admission

You can ask OPM to admit or deny specific facts. If OPM admits a fact, it may be established without further proof at the hearing. If OPM denies a fact, be prepared to support it with evidence; the Administrative Judge weighs the record. Strategic requests for admission might include:

• Admit that the applicant's treating physician diagnosed [condition] using [specific diagnostic criteria]
• Admit that the agency separated the applicant for medical inability to perform the essential functions of their position
• Admit that the applicant filed the Request for Reconsideration within 30 calendar days

4. Depositions

You can take sworn oral testimony from OPM employees, including the medical officer who reviewed your case. Depositions are the most powerful — and most expensive — discovery tool. For a pro se appellant, depositions can be logistically difficult because they require scheduling, a court reporter, and potentially travel. But they're available if you need them.

In a disability case, deposing OPM's medical consultant is sometimes the single most effective discovery move. You can ask the consultant directly: "Did you consider subjective clinical evidence?" If the Bruner presumption applies, Garland v. OPM (Fed. Cir. April 2026) is relevant: the Federal Circuit held that OPM cannot rebut the presumption merely by asserting a lack of objective tests and must consider competent medical evidence, including clinical diagnoses based on established diagnostic criteria.

How Discovery Works Procedurally

After you file your MSPB appeal, the assigned Administrative Judge issues an Acknowledgment Order that sets initial litigation deadlines, including the discovery period. Check the order for the start and close dates.

To initiate discovery, you serve your requests directly on OPM's representative (usually an OPM attorney from the Office of General Counsel). You do not file discovery requests with the MSPB itself unless there's a dispute.

If OPM objects to your discovery requests or refuses to comply, you file a motion to compel with the Administrative Judge. The AJ has broad authority to enforce discovery and can sanction a party that obstructs it — including drawing adverse inferences from withheld evidence.

Important timing note: Discovery requests must be served during the discovery period. If you miss the window, the AJ can deny late requests. Review the Acknowledgment Order carefully and calendar every deadline.

Discovery for Pro Se Appellants

If you're representing yourself, discovery is one of the most valuable tools in your MSPB appeal — but it requires organization. Draft your requests clearly, follow the scope and procedures in 5 CFR 1201.72–1201.73, and serve them on time.

Keep your requests focused. Judges appreciate targeted discovery that goes to the core issues — not fishing expeditions. A focused set of 10 interrogatories and 15 document requests will accomplish more than 50 vague questions.

The FERS Disability Denial Appeal Guide covers how to structure discovery requests that target the most common OPM denial patterns, including templates for interrogatories that expose whether the medical officer applied the correct legal standard to your evidence.

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