Is carbidopa / levodopa covered by Medicare Part D?
5,052 of 5,052 Medicare Part D plan offerings (100%) list carbidopa / levodopa on their 2026 formulary, most often on tier 2; 0% of the formularies that cover it require prior authorization. Part D spending on it was $121 million in 2024 for at least 569,783 people: what plans and patients paid at the pharmacy, before manufacturer rebates (CMS Part D Spending by Drug).
- Plans that cover it
- 100%
- 5,052 of 5,052 offerings; the median drug: 76%
- Usual tier
- Tier 2
- from tier 1 to tier 3
- Prior authorization
- 0%
- of formularies that cover it; the median drug: 1%
- Quantity limits
- 1.8%
- of formularies that cover it; the median drug: 30%
1.8% of the formularies that cover it require step therapy (trying another drug first).
Source: CMS Part D formulary file, 2026 second quarter: the formularies in use in 2026. A plan's 2027 formulary can differ; check your own plan's coverage in Medicare Plan Finder.
What does it cost under Part D in 2027?
- Your yearly cap in 2027
- Out-of-pocket spending on covered Part D drugs stops at $2,400 in 2027 ($2,100 in 2026); after that, you pay nothing for covered drugs for the rest of the year.
- The deductible
- A plan's drug deductible is at most $700 in 2027 ($615 in 2026); many plans charge less or none.
Source: CMS, Announcement of calendar year 2027 Part D parameters; Medicare.gov, “How much does Medicare drug coverage cost?” (read Oct. 7, 2026).
How much does Medicare spend on it?
Part D spending by year
569,783 people filled it under Part D in 2024, in 3,569,362 claims. The amounts are what plans and patients paid at the pharmacy, before manufacturer rebates.
Source: CMS Medicare Part D Spending by Drug, 2020 to 2024 (published June 2026). Row used: Carbidopa-Levodopa (Carbidopa/Levodopa), Carbidopa-Levodopa ER (Carbidopa/Levodopa).
Which forms and strengths are counted?
- 8 hour carbidopa 23.75 mg / levodopa 95 mg extended-release oral capsule
- 8 hour carbidopa 36.25 mg / levodopa 145 mg extended-release oral capsule
- 8 hour carbidopa 48.75 mg / levodopa 195 mg extended-release oral capsule
- 8 hour carbidopa 61.25 mg / levodopa 245 mg extended-release oral capsule
- carbidopa 10 mg / levodopa 100 mg disintegrating oral tablet
- carbidopa 10 mg / levodopa 100 mg oral tablet
- carbidopa 25 mg / levodopa 100 mg disintegrating oral tablet
- carbidopa 25 mg / levodopa 100 mg extended-release oral tablet
- carbidopa 25 mg / levodopa 100 mg oral tablet
- carbidopa 25 mg / levodopa 250 mg disintegrating oral tablet
- carbidopa 25 mg / levodopa 250 mg oral tablet
- carbidopa 50 mg / levodopa 200 mg extended-release oral tablet
Which other versions are listed?
The same ingredients under other names, each with its own coverage and spending.
- Rytary (carbidopa / levodopa)12% of plan offerings
- Duopa (carbidopa / levodopa)1% of plan offerings
- Crexont (carbidopa / levodopa)0.1% of plan offerings
- Sinemet (carbidopa / levodopa)under 0.1% of plan offerings
What else should you check?
- Stand-alone drug plans for 2027Premiums and deductibles
- Drugs Medicare spends the most onThe 2024 spending list
- 2027 costs and limitsDeductibles and out-of-pocket limits
Data, not medical advice. Coverage is the share of plan formularies listing the drug; your plan's formulary, tier and pharmacy decide what you pay.