Skip to main content

Independent; not a government site. Official answers: Medicare.gov, 1-800-MEDICARE.

PlainMedicare

Is NovoLog Mix (insulin aspart protamine, human / insulin aspart, human) covered by Medicare Part D?

3,953 of 5,052 Medicare Part D plan offerings (78.2%) list NovoLog Mix on their 2026 formulary, most often on tier 3; 0% of the formularies that cover it require prior authorization. Part D spending on it was $78 million in 2024 for at least 58,653 people: what plans and patients paid at the pharmacy, before manufacturer rebates (CMS Part D Spending by Drug).

Plans that cover it
78.2%
3,953 of 5,052 offerings; the median drug: 76%
Usual tier
Tier 3
from tier 1 to tier 6
Prior authorization
0%
of formularies that cover it; the median drug: 1%
Quantity limits
36.2%
of formularies that cover it; the median drug: 30%

0.7% 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?

Insulin costs at most $35 a month
A one-month supply of each Part D-covered insulin costs no more than $35, and the drug deductible does not apply to insulin.
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?”; Medicare.gov, “Insulin” (read Oct. 7, 2026).

How much does Medicare spend on it?

Part D spending by year

2020$533 million
2021$478 million
2022$436 million
2023$402 million
2024 (latest)$78 million

58,653 people filled it under Part D in 2024, in 291,407 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: Novolog Mix 70-30 (Insulin Aspart Prot/Insuln Asp), Novolog Mix 70-30 Flexpen (Insulin Aspart Prot/Insuln Asp).

Which forms and strengths are counted?

  • 3 ml insulin aspart protamine, human 70 units/ml / insulin aspart, human 30 units/ml pen injector
  • insulin aspart protamine, human 70 units/ml / insulin aspart, human 30 units/ml injectable suspension

What else should you check?

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.