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Blog / Part D

Part D

20 articles on part d, written for South Texas.

Part D

What is Medicare Part D?

Prescription coverage sold by private companies under federal rules. Here is how it works, what it costs and why skipping it is expensive.

Updated August 17, 2026 · 2 min read

Part D

How much does Medicare Part D cost per month?

Four separate charges, only one of which is the premium. Here is what makes up your actual annual drug spending.

Updated August 17, 2026 · 3 min read

Part D

Do I need Part D if I do not take any medications?

Almost always yes, and the reason is arithmetic rather than sales. Here is what going without actually costs.

Updated August 17, 2026 · 2 min read

Part D

What is the Part D late enrollment penalty?

About 1 percent of a national base premium for every month you went without, added permanently. Here is how it is calculated and how to fight it.

Updated August 17, 2026 · 2 min read

Part D

Is my drug covered? How to check a Part D formulary

Every plan covers a different list at different prices. Here is how to check yours properly, and what to do when a drug is not on it.

Updated August 17, 2026 · 3 min read

Part D

What is the Medicare donut hole?

The coverage gap that used to sit in the middle of every drug plan year, what replaced it, and why it still matters for understanding your costs.

Updated August 17, 2026 · 2 min read

Part D

What is the annual out of pocket cap on Medicare drug costs?

A hard limit on what you pay for covered prescriptions each year. What counts toward it, what does not, and why it changes plan selection.

Updated August 17, 2026 · 2 min read

Part D

When can I enroll in or change my Part D plan?

Every window for joining, switching or dropping drug coverage, and the two month deadline that catches people leaving employer plans.

Updated August 17, 2026 · 2 min read

Part D

What is Extra Help and do I qualify?

A federal subsidy that cuts prescription costs sharply for people with limited income. Widely available in South Texas and widely unclaimed.

Updated August 17, 2026 · 2 min read

Part D

How do I compare Medicare Part D plans?

A step by step method that takes about thirty minutes and routinely saves people hundreds a year.

Updated August 17, 2026 · 2 min read

Part D

Does Medicare Advantage include Part D, or do I need a separate plan?

Most Advantage plans include drug coverage. Here is how to tell which route you are on and the mistake that gets people disenrolled.

Updated August 17, 2026 · 2 min read

Part D

What drugs are not covered by Medicare Part D?

Some categories are excluded by law, others are simply off your plan's list. The difference determines whether you can do anything about it.

Updated August 17, 2026 · 2 min read

Part D

What are Part D drug tiers and copays?

Every plan sorts drugs into tiers and prices them accordingly. Here is what each tier means and where the real money is.

Updated August 17, 2026 · 2 min read

Part D

What is prior authorization and step therapy for my medication?

Two ways a plan controls costs before covering a drug. Both are appealable, and both are worth checking before you enroll.

Updated August 17, 2026 · 3 min read

Part D

Can I switch Part D plans if my drug is dropped?

Usually not, and that surprises people. Here is what protections you actually have and how to handle a mid year formulary change.

Updated August 17, 2026 · 3 min read

Part D

What is creditable drug coverage?

Coverage at least as good as Part D. Knowing whether yours qualifies is what stands between you and a permanent penalty.

Updated August 17, 2026 · 2 min read

Part D

How do I sign up for Part D for the first time?

What you need before you can enroll, the three ways to do it, and the checks worth doing first.

Updated August 17, 2026 · 2 min read

Part D

What is the Part D deductible?

The amount you pay before the plan starts sharing costs, and why the tiers it applies to matter more than the number itself.

Updated August 17, 2026 · 2 min read

Part D

Do I pay a Part D penalty if I had VA or employer drug coverage?

Generally no, because both are creditable. Here is how to prove it if a penalty gets applied anyway.

Updated August 17, 2026 · 2 min read

Part D

What happens to my Part D if I have Medicaid too?

Dual eligibles get automatic Extra Help, automatic plan enrollment, and more chances to switch. Here is what to know so the automatic part works for you.

Updated August 17, 2026 · 2 min read