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Medicare and Diabetes in Sioux Falls 2026: Part B Supplies, the $35 Insulin Cap, and the New $2,100 Drug Cost Ceiling

Roughly 3,953 Minnehaha County Medicare beneficiaries have diagnosed diabetes — here is what every Part B benefit, every drug cost cap, and every local plan decision looks like in 2026.

Big Sioux Benefits Data Desk

Published July 20, 2026 · 9 min read · Sourced from CMS.gov & CDC PLACES

Medicare covers far more for diabetes management than most beneficiaries realize — blood glucose monitors, test strips, continuous glucose monitors, self-management training, medical nutrition therapy, and routine foot exams are all Part B benefits. And the drug side of the equation changed fundamentally with the $35 monthly insulin cap, then again in 2026 with the new $2,100 annual Part D ceiling.

Every figure in this article comes from public federal data: the CMS Medicare Advantage / Part D Landscape (PY2026), CMS county enrollment, CDC PLACES 2023 county health data, and CMS 2026 star ratings. No invented numbers, no "call for pricing."

Diabetes in Minnehaha County: the numbers behind the story

Before diving into benefits, the local health picture matters. CDC PLACES 2023 estimates for Minnehaha County adults show diabetes alongside several of its most common companions:

Source: CDC PLACES: Local Data for Better Health, County 2023 (2023), Minnehaha County.

At 10% diagnosed diabetes prevalence, applied to the county's 39,532 Medicare beneficiaries, roughly 3,953 local people are managing diabetes on Medicare. The 37.4% obesity rate — the county's highest single chronic-condition figure — signals additional pre-diabetes risk in the population. High blood pressure (31.7%) and arthritis (22.9%) frequently co-occur with diabetes, compounding the benefits picture and making multi-prescription coverage decisions more complex.

What Medicare Part B covers for diabetes management

Part B is the medical insurance side of Medicare. It covers physician services, outpatient care, and durable medical equipment — and for diabetes management it is surprisingly comprehensive. Every benefit below is available to beneficiaries in Original Medicare. Medicare Advantage PPOs must cover at least the same Part B benefits as Original Medicare.

Sources: Medicare.gov — Blood Sugar Monitors; Medicare.gov — DSMT; Medicare.gov — Foot Care for Diabetes; Medicare.gov — Medical Nutrition Therapy.

Test strip limits matter. If you use insulin, Part B covers up to 300 test strips and 300 lancets per 90-day period. Non-insulin users are generally covered for up to 100 test strips per 90 days. With documented medical need, your doctor can prescribe higher quantities and Part B can cover them. Your supplier must be enrolled in Medicare; purchasing from a non-enrolled supplier means no Part B coverage applies.

Continuous glucose monitors qualify as Part B DME for beneficiaries who need frequent dosage adjustments or have documented hypoglycemia unawareness. If your doctor documents the medical necessity, you pay 20% of the Medicare-approved amount after the Part B deductible — the same cost structure as a traditional glucose monitor, but with the real-time data advantage of continuous monitoring.

Insulin via insulin pump is a Part B benefit, not Part D. If you use an external insulin pump, both the pump and the insulin it delivers are covered under Part B as DME. The $35 monthly insulin cap is a Part D rule and does not apply to pump insulin. For pump users, the Part B 20% coinsurance applies with no annual ceiling under Original Medicare alone — which is one key reason a Medigap plan that covers Part B coinsurance is valuable for pump-dependent diabetics.

Diabetes screenings and self-management training under Part B

Beyond supplies, Part B covers two under-used education benefits that cost very little out of pocket and can meaningfully improve long-term outcomes.

Diabetes screenings: If you have risk factors — high blood pressure, obesity, high cholesterol, or a family history of diabetes — Medicare covers up to 2 diabetes screenings per year at $0 cost-sharing. Tests may include fasting glucose, A1C, or other approved glucose tests. If you have already been diagnosed, ongoing monitoring labs fall under standard Part B outpatient services and are subject to the 20% coinsurance after the $257 deductible — not the preventive $0 category.

Diabetes Self-Management Training (DSMT): With a physician referral, Part B covers up to 10 hours of initial training — 1 hour of individual instruction and 9 hours of group sessions. In subsequent calendar years, up to 2 hours of follow-up training per year is available if your doctor determines it is medically appropriate. You pay 20% of the Medicare-approved amount after the Part B deductible. Topics covered include blood glucose monitoring, nutrition, physical activity, medication management, and complication risk reduction.

Medical Nutrition Therapy (MNT): A registered dietitian visit is covered under Medicare Part B with a physician referral — up to 3 hours in the first calendar year and 2 hours per year after that. For qualifying diabetics with a referral, MNT carries no cost-sharing. Note that if you receive both DSMT and MNT in the same calendar year, certain coordination requirements apply; your provider can clarify which benefit fits your situation best.

The $35 monthly insulin cap: what Part D now guarantees

The Inflation Reduction Act established a permanent $35-per-month cap on what Medicare Part D plans can charge for covered insulins. The cap applies to every covered insulin product on your plan's formulary, regardless of which tier it sits on and regardless of where you stand in the deductible phase.

The cap applies per insulin product per month. If you use two separate insulin types — for example, a long-acting basal insulin plus a rapid-acting bolus insulin — the cap applies to each one. Your maximum monthly insulin cost would be $70 ($35 x 2), which is still a major protection for beneficiaries who previously paid hundreds per month before meeting their deductible.

One critical distinction: the $35 cap is a Part D rule only. If your insulin is administered through an external insulin pump, it is covered as Part B DME — not Part D — and the $35 monthly cap does not apply to it. Pump insulin is subject to the standard 20% Part B coinsurance after the annual deductible. This makes Medigap's Part B coinsurance coverage especially relevant for insulin pump users who face unlimited 20% exposure under Original Medicare alone.

The 2026 $2,100 Part D cap and high-cost diabetes drugs

The insulin cap protects insulin users. But the broader $2,100 annual Part D out-of-pocket maximum is the bigger story for diabetics on modern specialty drugs, brand-name oral medications, or complex multi-prescription regimens. Before 2024, Part D had no hard annual ceiling — catastrophic-phase costs were theoretically unlimited. The 2026 limit applies to all five Sioux Falls Medicare Advantage PPOs and to all stand-alone Part D plans offered in Minnehaha County.

Source: Medicare.gov — Part D drug coverage costs; CMS Medicare Advantage / Part D Landscape (PY2026). Cost scenarios are illustrative; actual costs depend on plan formulary and pharmacy. Verify your specific drugs with a licensed agent or Medicare.gov before enrolling.

The practical shift for diabetic beneficiaries is this: plan selection now becomes largely a formulary question, not a premium question. Since the $2,100 ceiling applies across all plans, the real comparison comes down to which plan's formulary covers your specific diabetes drugs at the most favorable tier, and which drug deductible — ranging from $300 to $615 across the 5 local PPOs — applies to your medications in January before you meet it. Generic oral diabetes drugs (like metformin) often fall on Tier 1, which is typically exempt from the deductible entirely, making the deductible less relevant for many beneficiaries.

How Sioux Falls' 5 Medicare Advantage PPOs compare for diabetes

All 5 Medicare Advantage PPOs available in Minnehaha County include drug coverage (MAPD), so the $35 insulin cap and the $2,100 Part D ceiling apply regardless of which PPO you enroll in. The plan-specific differences that matter most for diabetics are the drug deductible (what you pay in January before formulary coverage activates for many brand drugs) and the plan's annual out-of-pocket maximum on the medical side.

Source: CMS Medicare Advantage / Part D Landscape (PY2026); CMS Medicare Advantage & Part D Star Ratings (2026). Monthly premium is the plan-only premium; the standard Part B premium ($185/month in 2025; IRMAA surcharges may apply at higher incomes) is charged separately by Medicare.

For most diabetics on generic oral medications, the drug deductible difference between plans ($300 vs. $615) has limited practical impact because generics typically land on Tier 1 or Tier 2, which are often exempt from the deductible. For beneficiaries on brand-name or specialty diabetes drugs, choosing a plan with the lower deductible can save meaningful money in the early months of the year before that threshold resets on January 1.

All 5 PPOs carry 3.5-star CMS ratings for 2026 — meaning none earns the 5-star designation that would trigger a year-round Special Enrollment Period. If you want to change plans, your windows are the Annual Enrollment Period (Oct 15 to Dec 7) and the Medicare Open Enrollment Period (Jan 1 to Mar 31, for current Advantage enrollees who want one more switch).

Medigap Plan G vs. Plan N for diabetes-related Part B bills

If you choose Original Medicare rather than a Medicare Advantage PPO, a Medigap plan is your primary tool for managing the 20% Part B coinsurance that diabetes supplies, CGMs, self-management training, foot exams, and specialist visits generate without any annual ceiling. Plan G and Plan N are the two most common options for beneficiaries who first became eligible for Medicare on or after January 1, 2020.

Source: CMS Publication 02110 — standardized Medigap plan benefits under 42 CFR §403.205.

For a diabetic beneficiary who sees an endocrinologist quarterly, needs regular CGM supplies, and has foot exams twice a year, the predictability of Medigap Plan G — where after the $257 deductible you owe nothing for Part B costs — can outweigh its higher monthly premium versus Plan N. Plan N's $20 office copay adds up over four specialist visits per year. Plan G also pulls clearly ahead if you ever see a provider who does not accept Medicare assignment: Plan G covers Part B excess charges (up to 15% above the Medicare-approved amount), while Plan N does not.

Neither plan has an annual ceiling on Part B costs, because Medigap works differently from Medicare Advantage — there is no MOOP under the Medigap design. But Medigap Plan G's coverage of 100% of Part B coinsurance effectively removes Part B cost-sharing as a variable after the deductible is met. For diabetics who also use an insulin pump (where pump insulin is a Part B cost), that comprehensive coinsurance coverage is especially valuable.

Sanford vs. Avera: your diabetes care network question

Sioux Falls' two major health systems both have endocrinology and diabetes management programs, and both hold strong CMS Hospital Compare ratings. Your plan choice determines where your care costs the least.

Source: CMS Hospital Compare — Overall Star Ratings.

Sanford USD Medical Center holds a 5-star CMS rating; Avera McKennan holds a 4-star — both represent strong quality signals for diabetes-related care including wound care, nephrology, and ophthalmology referrals. The key distinction for plan selection: Sanford runs its own Medicare Advantage plans (the Align series), which naturally favor the Sanford network. If your endocrinologist or diabetologist practices at Avera, an Aetna or Wellmark plan may be a better fit for keeping your care in-network at the lowest cost. Confirming your specific diabetes care team is in your chosen plan's 2026 network before you enroll is the single most important step in plan selection.

What to watch for in 2027

1. Annual Notice of Change in September: Plans update formularies each year. If your insulin brand or specialty diabetes drug changes tier for 2027, your cost-sharing changes too. Read your ANOC when it arrives in September; it is your signal to re-run your drug comparison before AEP closes December 7.
2. CGM coverage criteria updates: CMS has been actively expanding CGM coverage. Rules that previously required frequent insulin dosage adjustments may be broadened. Watch Medicare.gov for any new national coverage determinations that could qualify more beneficiaries for continuous monitoring under Part B.
3. Star rating announcements in October: CMS releases updated plan star ratings each October. If any Sioux Falls plan earns 5 stars, a year-round enrollment Special Enrollment Period opens. No local standard PPO holds 5 stars for 2026.
4. Part D plan redesign: The $2,100 cap and $35 insulin ceiling changed the economics of Part D plan design. Some plans may adjust premiums, formularies, or deductible levels significantly for 2027. Re-running your drug comparison at each AEP remains essential, even if you are satisfied with your current plan.
5. IRMAA income lookback timing: Medicare Part B and Part D IRMAA surcharges for 2026 are based on your 2024 tax return. If your income dropped significantly in 2024 (retirement, job loss, divorce), you may qualify for an IRMAA appeal that reduces your 2026 surcharge — file SSA Form SSA-44 with supporting documentation.

How we know all this: Big Sioux Benefits runs every article through a data desk that cross-references the CMS plan landscape, county enrollment, 2026 star ratings, hospital quality data, and CDC PLACES health data — built by Strategic AI Architects. Every figure here is from a public federal dataset. This is education, not advice; confirm your plan, costs, and eligibility with a licensed agent or Medicare.gov. We take no payment from any carrier to feature a plan.