What "Best" Means When You're Managing Diabetes
There is no single best diabetes plan for everyone. What works depends on your type of diabetes, how your body responds to treatment, what you can afford, and which doctors and pharmacies are near you. This guide walks you through the main options — insulin, oral medications, continuous glucose monitors, and support programs — so you can understand what each one does and what it costs.
The goal is not to tell you which to choose. It is to show you what questions to ask your doctor, what programs exist to reduce your costs, and where to find the tools and support that fit your actual life, not an imaginary one.
Key Takeaways
- Insulin, oral medications, and continuous glucose monitors each work differently and cost differently, and your doctor's recommendation depends on your blood sugar patterns and medical history, not on what is cheapest.
- Medicare covers insulin at a maximum of $35 per month if you are on Part D, and many states cover insulin for uninsured adults through Medicaid or state-specific programs.
- Continuous glucose monitors (CGMs) are covered by Medicare Part B and most insurance plans if your doctor documents that you use insulin, but coverage rules vary by plan.
- Patient information programs run by insulin and medication manufacturers can reduce your out-of-pocket cost to zero or near-zero if your income is below a certain threshold.
- Diabetes education programs, usually covered by insurance, teach you how to use your medications correctly and spot problems early, which often costs less than treating complications later.
Insulin: When It's Needed and What It Costs
If you have type 1 diabetes, you need insulin — your pancreas does not make it. If you have type 2 diabetes, you may need insulin if oral medications are not controlling your blood sugar well enough. Your doctor decides this based on your A1C (a blood test that shows your average blood sugar over three months), not on cost or convenience.
Insulin comes in different types: rapid-acting (works in minutes), long-acting (works over 24 hours), and mixtures. Most people use a combination. A vial or pen costs between $30 and $300 without insurance, depending on the type and brand. With Medicare Part D, your cost is capped at $35 per month as of 2024. If you have commercial insurance, your copay depends on your plan — it may be $0, $10, $25, or more.
If you are uninsured or underinsured, contact the manufacturer directly. Eli Lilly, Novo Nordisk, and Sanofi (the three major insulin makers) all run patient information programs that provide insulin for free or nearly free if your household income is below 200% to 400% of the federal poverty line. You do not need to be a U.S. citizen. Your doctor's office can help you explore, or you can call the manufacturer's number on the insulin box.
Oral Medications and GLP-1 Drugs for Type 2 Diabetes
If you have type 2 diabetes and your blood sugar is not controlled by diet and exercise alone, your doctor will usually start with a pill — metformin is the most common first choice. It costs $4 to $15 per month without insurance at most pharmacies. Other classes include sulfonylureas, DPP-4 inhibitors, SGLT2 inhibitors, and GLP-1 drugs (semaglutide, tirzepatide, and others).
GLP-1 drugs are newer and more expensive. A month's supply can cost $900 to $1,300 without insurance. With Medicare Part D, your cost depends on your plan, but many plans now cover them at a lower tier because demand is high. If you have commercial insurance, your copay may be $50 to $250 per month. If you are uninsured, the manufacturers (Novo Nordisk for semaglutide, Eli Lilly for tirzepatide) offer patient information programs that can reduce your cost to $0 to $99 per month.
Oral medications work best when you take them exactly as prescribed. Set a phone reminder, use a pill organizer, or ask your pharmacist to pre-fill a blister pack so you do not miss doses. Missing doses is the most common reason people say a medication "did not work."
Continuous Glucose Monitors (CGMs) and Blood Sugar Tracking
A continuous glucose monitor is a small sensor you wear on your arm or belly that checks your blood sugar every few minutes and sends the reading to your phone or a separate reader. It shows you patterns — when your blood sugar rises after certain foods, when it drops at night, when stress affects it. This information helps you and your doctor adjust your medications and diet.
CGMs are covered by Medicare Part B if you use insulin. Your cost is usually $0 to $50 per month depending on your plan. Most commercial insurance plans cover CGMs if your doctor documents that you use insulin or have type 1 diabetes. If you have type 2 diabetes and do not use insulin, coverage is less common but some plans will cover it if your doctor writes a letter explaining medical necessity.
If you are uninsured, the manufacturers (Abbott, Dexcom, Medtronic) offer patient information programs. You may pay $0 to $75 per month depending on your income. The sensor itself lasts 10 to 14 days, so you will need a new one every two weeks. Ask your doctor to write a prescription — without one, you cannot get insurance coverage and the full retail price is $100 to $150 per sensor.
Diabetes Education and Support Programs
Diabetes education is a structured program where a nurse or dietitian teaches you how to manage your condition — how to take your medications, read food labels, recognize low blood sugar, and prevent complications. Medicare covers this at no cost if your doctor refers you. Most commercial insurance plans cover it too. Many programs are now available online, so you do not have to travel.
Support groups — in person or online — connect you with other people managing diabetes. The American Diabetes Association runs local chapters and online communities. Joslin Diabetes Center offers free online classes. Your local hospital or clinic often runs free support groups. These are not therapy, but they reduce isolation and help you learn from people who face the same problems you do.
Dietitian visits are often covered by insurance if your doctor refers you for "medical nutrition therapy." A dietitian can help you understand how different foods affect your blood sugar and build a meal plan that fits your budget and preferences. This usually costs $0 to $50 per visit with insurance, or $75 to $200 without.
Comparing Costs Across Insurance Types
Your out-of-pocket cost for diabetes medications and devices depends on what type of insurance you have. The table below shows typical ranges, but your actual cost will depend on your specific plan, your deductible, and whether you have met it.
| Type of Coverage | Insulin Cost | Oral Medications | CGM Cost |
|---|---|---|---|
| Medicare Part D | $35/month cap | $0–$50/month (varies by plan) | $0–$50/month (if insulin user) |
| Commercial Insurance | $0–$100/month (copay varies) | $0–$75/month (varies by plan) | $0–$100/month (if insulin user) |
| Uninsured (with information) | $0–$35/month (manufacturer program) | $0–$99/month (manufacturer program) | $0–$75/month (manufacturer program) |
| Uninsured (no information) | $30–$300/month | $4–$1,300/month | $100–$150 per sensor |
If you are uninsured or your insurance does not cover what you need, do not skip doses or ration medication. Contact the manufacturer's patient information program first — most people who explore are approved. If that does not work, ask your doctor about generic versions or older medications that cost less. Your local health department or community health center can also point you to low-cost clinics and programs.
Red Flags: When to Talk to Your Doctor Again
If your blood sugar is not improving after three months on a new medication, tell your doctor. Do not assume the medication is not working — it may be a dosing issue, a timing issue, or a drug interaction with something else you take. Your doctor may need to adjust the dose, switch the time you take it, or try a different medication.
If you are having side effects — nausea, weight loss, low blood sugar episodes, or anything else that makes you want to stop taking the medication — tell your doctor before you stop. Many side effects go away after a few weeks, or your doctor can switch you to something else. Stopping medication without talking to your doctor can lead to dangerously high blood sugar.
If you cannot afford your medication, tell your doctor. Do not just stop taking it. Your doctor may know about programs you do not, may be able to prescribe a cheaper alternative, or may have samples to give you while you sort out coverage.
Frequently Asked Questions
Does Medicare cover diabetes medications and supplies?
Medicare Part D covers insulin and oral medications, with insulin capped at $35 per month. Part B covers continuous glucose monitors if you use insulin, and blood sugar testing supplies (lancets, test strips) if you use insulin or certain oral medications. Coverage details vary by plan, so check your plan documents or call 1-800-MEDICARE to confirm what your specific plan covers.
What if I cannot afford my insulin even with insurance?
Contact the insulin manufacturer directly — Eli Lilly, Novo Nordisk, and Sanofi all run patient information programs that provide insulin for free or nearly free based on income. Your doctor's office can help you explore, or you can call the number on your insulin box. If you are on Medicare, you may also be may be able to access for the Extra Help program, which reduces Part D costs for people with low income.
Can I use a continuous glucose monitor if I do not use insulin?
Insurance coverage is harder to get if you do not use insulin, but some plans will cover it if your doctor documents medical necessity. Ask your doctor to write a letter explaining why you need it. If insurance will not cover it, contact the manufacturer (Abbott, Dexcom, Medtronic) about their patient information programs, which may reduce your cost to $0–$75 per month.
How do I know if a diabetes medication is working?
Your doctor checks your A1C (average blood sugar over three months) every three to six months. A1C below 7% is the goal for most people, though your doctor may set a different target based on your age and health. You can also check your own blood sugar at home with a meter or CGM to see how specific foods and activities affect you. If your A1C is not improving after three months, talk to your doctor — do not assume the medication is not working.
Are there free diabetes education programs?
Yes. Medicare covers diabetes education at no cost if your doctor refers you. Most commercial insurance plans cover it too. The American Diabetes Association, Joslin Diabetes Center, and your local hospital or clinic offer free or low-cost classes, many now available online. Ask your doctor for a referral, or search "diabetes education near me" to find programs in your area.