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Ampicillin 500 mg/1 Medicare Part D Coverage

Dosage form
CAPSULE
Route
ORAL
Drug class
Antibiotics — Penicillins
100%
of Medicare Part D plans
cover Ampicillin
5,529 of 5,530 plans
1.9
Avg. formulary tier
$15.00
Median 30-day copay
$0.00–$30.00
Copay range

Formulary Tier Distribution

How Medicare Part D plans classify Ampicillin. Lower tiers = lower copays.

Tier 1 - Preferred Generic 14%
765 plans • avg $0.00/mo
Tier 2 - Generic 84%
4,654 plans • avg $1.62/mo
Tier 3 - Preferred Brand 0%
10 plans • avg $26.10/mo
Tier 4 - Non-Preferred Drug 2%
100 plans

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Ampicillin Medicare Coverage by State

Coverage rates and average costs vary significantly by state. Click a state to see the specific plans available there.

Alabama 100% avg $0.76 Arizona 100% avg $0.41 Arkansas 100% avg $0.69 California 100% avg $0.72 Colorado 100% avg $0.92 Connecticut 100% avg $1.00 Delaware 100% avg $1.62 District of Columbia 100% avg $1.33 Florida 100% avg $0.21 Georgia 100% avg $0.99 Hawaii 100% Idaho 100% avg $0.68 Illinois 100% avg $0.70 Indiana 100% avg $1.17 Iowa 100% avg $0.04 Kansas 100% avg $0.10 Kentucky 100% avg $0.39 Louisiana 100% avg $6.48 Maine 100% avg $0.17 Maryland 100% avg $0.56 Massachusetts 100% avg $1.52 Michigan 100% avg $4.99 Minnesota 100% avg $1.32 Mississippi 100% avg $0.39 Missouri 100% avg $0.40 Montana 100% avg $0.62 Nebraska 100% Nevada 100% avg $0.52 New Hampshire 100% New Jersey 100% avg $0.59 New Mexico 100% avg $0.42 New York 100% avg $1.46 North Carolina 100% avg $1.26 North Dakota 100% avg $1.10 Ohio 100% avg $2.22 Oklahoma 100% avg $1.14 Oregon 100% avg $1.00 Pennsylvania 100% avg $0.56 Puerto Rico 100% Rhode Island 100% South Carolina 100% avg $0.72 South Dakota 100% avg $1.44 Tennessee 100% avg $1.29 Texas 100% avg $1.13 Utah 100% avg $0.91 Vermont 100% Virginia 100% avg $0.07 Washington 100% avg $0.34 West Virginia 100% avg $1.55 Wisconsin 100% avg $0.79 Wyoming 100%

Alternative Medications in the Same Drug Class

Other drugs in the Antibiotics — Penicillins that Medicare Part D plans also cover.

Amoxicillin and Clavulanate Potassium Avg Tier 2.2 $15.00/mo 5,529 plans Amoxicillin Avg Tier 1.4 $18.00/mo 5,529 plans Amoxicillin Avg Tier 1.2 $18.00/mo 5,529 plans Amoxicillin Avg Tier 1.2 $18.00/mo 5,529 plans Amoxicillin Avg Tier 1.2 $18.00/mo 5,529 plans Ampicillin and Sulbactam Avg Tier 3.6 $12.00/mo 5,529 plans Amoxicillin Avg Tier 1.3 $18.00/mo 5,529 plans Amoxicillin and Clavulanate Potassium Avg Tier 2.3 $15.00/mo 5,529 plans

Frequently Asked Questions about Ampicillin

100% of Medicare Part D plans cover Ampicillin. It is most commonly placed on Tier 2. Coverage varies by plan and geographic area.

The median 30-day copay for Ampicillin on Medicare Part D is $15.00 at a preferred pharmacy. Costs range from $0.00 to $30.00 depending on the plan.

Ampicillin is placed on Tier 2 by most Medicare Part D plans. Lower tier numbers generally mean lower copays.

0% of plans require prior authorization for Ampicillin. Prior authorization means your doctor must confirm the drug is medically necessary before the plan will cover it.

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Coverage statistics based on CMS formulary data for plan year 2026. Data updated regularly. Methodology →