CMS's Part D preclusion list bars a physician from having any Part D pharmacy claim paid for a drug the physician prescribes, regardless of medical necessity or which plan the beneficiary carries. Placement follows a Medicare enrollment revocation or a felony conviction that CMS finds detrimental to the program under 42 CFR 423.120(c)(6). Once the physician's window to contest the finding closes, every Part D plan sponsor and pharmacy benefit manager in the country must reject that physician's prescriptions at the pharmacy counter. A referral base built over years can unravel within weeks of the notice letter.
What the Preclusion List Is
CMS built the preclusion list to keep Part D dollars from reaching prescribers whose enrollment history CMS has found detrimental to the program. The Part D authority sits at 42 CFR 423.120(c)(6): a Part D sponsor must reject, or require its pharmacy benefit manager to reject, a pharmacy claim when the prescriber is on the list, subject to narrow exceptions such as emergency care. Claim rejections tied to the list took effect April 1, 2019, and CMS updates the list monthly. The rejection applies at every Part D plan at once: the physician loses the ability to have a Part D claim paid anywhere in the country, not just with one payer.
Who CMS Places on the List
CMS adds a prescriber to the list on one of three grounds: currently revoked from Medicare with an active reenrollment bar, where CMS finds the underlying conduct detrimental to the program; conduct that would have supported a revocation had the prescriber been enrolled, with the same detrimental finding; or a felony conviction under federal or state law within the preceding ten years that CMS determines is detrimental to Medicare. A revocation-based preclusion lasts for the length of the reenrollment bar, generally one to three years depending on the severity of the underlying conduct. A felony-based preclusion lasts ten years from the date of conviction unless CMS determines a shorter period is warranted.
The Effect on Part D Prescribing
Preclusion is prospective. It does not claw back payments already made; that is the function of a recoupment demand tied to a specific audit. Preclusion cuts off future payment on every prescription the physician writes, across every Part D plan. Part D sponsors have 30 days after a list update to identify affected beneficiaries and must give at least 60 days' advance notice before claims start rejecting, so a sponsor generally will not deny a claim earlier than 90 days after the list is published. That grace period protects the beneficiary's access to medication, not the physician's ability to prescribe for Part D beneficiaries once the rejection window opens.
A preclusion notice runs on its own clock: once the physician's reconsideration window closes, every Part D plan in the country stops paying for that physician's prescriptions, whether or not the revocation itself is still on appeal.
Challenging Inclusion on the List
CMS mails written notice of preclusion stating the reason for inclusion and the appeal rights under 42 CFR Part 498. The physician has 60 days from the notice date to request reconsideration, and CMS holds the physician off the published list while a timely request is pending. Because preclusion almost always rests on the underlying revocation, the physician typically has to challenge both determinations together rather than as separate proceedings. Physicians also contesting a related overpayment demand from the same audit findings should treat that as a separate track: see our companion pieces on the five levels of Medicare overpayment appeals and on getting off a Medicare prepayment review payment hold.
Why Early Legal Counsel Is Critical
It is critical that physicians promptly retain experienced healthcare defense counsel upon receiving a preclusion list notice, revocation notice, or other government inquiry tied to Medicare enrollment. Early legal intervention can protect the physician's rights, ensure the reconsideration request meets the 60-day deadline, avoid inadvertent admissions in the response, and preserve defenses that may otherwise be lost once the list is published. Delaying representation can significantly affect the outcome of the matter and leave the physician unable to prescribe for Part D beneficiaries for months while the appeal proceeds.
How Health Law Alliance Can Help
Health Law Alliance defends physicians against Medicare enrollment revocations and Part D preclusion list determinations, including the reconsideration filings and Part 498 appeals that decide whether a physician stays able to prescribe for Part D beneficiaries. Our bench includes a former federal prosecutor and a former senior healthcare compliance executive, background that shapes how we evaluate which findings are defensible. If your practice has received a preclusion list notice or a related Medicare revocation, contact us for a free, confidential consultation.
