Medicare Part D does not cover tadalafil when it is prescribed for erectile dysfunction. Federal law specifically excludes drugs used to treat sexual or erectile dysfunction from Part D coverage. However, tadalafil is FDA-approved for other conditions, and Part D plans can cover it when prescribed for those purposes.
Why Part D Excludes Tadalafil for ED
A 2005 amendment to the Social Security Act removed drugs used for sexual or erectile dysfunction from the definition of a “Part D drug.” The exclusion isn’t about tadalafil specifically. It applies to the entire category of ED medications, including sildenafil and vardenafil. The law contains one important exception: if the same drug is FDA-approved for a condition other than ED, Part D plans are allowed to cover it for that other condition.
Tadalafil happens to fall into that exception. It carries FDA approval for two non-ED conditions: benign prostatic hyperplasia (BPH), which causes urinary symptoms from an enlarged prostate, and pulmonary arterial hypertension (PAH), a type of high blood pressure in the lungs. When prescribed for either of those diagnoses, tadalafil becomes eligible for Part D coverage.
Coverage for Enlarged Prostate (BPH)
Many Part D plans include tadalafil on their formularies for BPH, typically at the 5 mg daily dose. Getting coverage approved usually requires prior authorization, which means your prescriber submits documentation to the plan confirming the diagnosis. The plan needs to verify two things: that you are not taking the drug solely for ED, and that it is being prescribed for BPH.
Some plans also require step therapy, meaning you need to have tried other prostate medications first. A prior authorization form from one Medicare plan, for example, asks whether the patient has had an inadequate response to, intolerance of, or contraindication to both an alpha blocker and a 5-alpha reductase inhibitor. These are the two standard first-line drug classes for BPH. If your doctor can document that those options didn’t work or aren’t suitable for you, the plan is more likely to approve tadalafil.
If you take tadalafil for both BPH and ED, coverage can still apply as long as BPH is the documented medical reason for the prescription. Your doctor handles this on the clinical side. You don’t need to volunteer your full symptom picture to the pharmacy.
Coverage for Pulmonary Arterial Hypertension
For PAH, tadalafil is marketed under a different brand name (Adcirca) at a higher dose of 40 mg daily. Because PAH is a serious cardiovascular condition with no connection to ED, Part D plans generally cover it without the same level of scrutiny. You will still likely need prior authorization confirming the PAH diagnosis, but step therapy requirements are less common for this indication. If you have PAH and your specialist prescribes tadalafil, expect your Part D plan to cover it.
Medicare Advantage and Enhanced Plans
Starting in 2025, the Part D benefit redesign under the Inflation Reduction Act changed how plans can offer enhanced coverage. One of the limited options available to plan sponsors is covering drugs that are specifically excluded from standard Part D. This means some Medicare Advantage plans with prescription drug benefits (MA-PD plans) or enhanced Part D plans could, in theory, choose to add ED drug coverage as a supplemental benefit.
In practice, very few plans have done so. If this matters to you, check the formulary of any plan you’re considering during open enrollment. You can search a plan’s drug list on Medicare.gov or call the plan directly and ask whether tadalafil for ED is included as an enhanced benefit.
What Tadalafil Costs Without Coverage
If your Part D plan won’t cover tadalafil because you need it for ED, the retail price for a 30-day supply of generic 5 mg tablets runs around $390. That sticker price is misleading, though. Pharmacy discount programs and online coupons bring the cash price down dramatically, often to under $10 for the same supply. Prices as low as $7.84 for 30 tablets have been documented through discount networks as of early 2026.
Because generic tadalafil is so inexpensive through these programs, paying out of pocket is often cheaper than what you’d pay through insurance copays for a covered drug. If you’re filling a prescription for ED use, ask your pharmacist about available discount pricing before assuming you’re stuck with the full retail cost. These discounts are available to anyone, including Medicare beneficiaries, and don’t interfere with your Part D coverage for other medications.
How to Get Your Prescription Covered
If you have BPH symptoms along with ED, talk to your doctor about whether a tadalafil prescription for BPH is medically appropriate. Many men over 50 have both conditions, and the daily 5 mg dose treats both simultaneously. Your doctor can prescribe it with a BPH diagnosis code, making it eligible for Part D coverage.
If your plan denies coverage, you have the right to request an exception or appeal the decision. Your doctor can submit a letter of medical necessity explaining why tadalafil is needed for your non-ED condition. Most plans process these requests within 72 hours for standard appeals or 24 hours for expedited ones. If the first appeal fails, there are additional levels of review available through Medicare’s independent appeals process.