# Big Sioux Benefits — llms.txt

> Big Sioux Benefits is a licensed independent Medicare insurance agency serving the Sioux Falls metro and Siouxland — eastern South Dakota, northwest Iowa, and southwest Minnesota. We help Medicare-eligible residents compare and enroll in Medicare Advantage, Medicare Supplement (Medigap), and Part D plans. Guidance is free to clients. Data is from CMS public-use files.

## Key pages
- [Home](https://bigsiouxbenefits.com/)
- [Medicare 101 — parts explained](https://bigsiouxbenefits.com/medicare-101)
- [Medicare Advantage plans](https://bigsiouxbenefits.com/medicare-advantage-plans)
- [Sioux Falls (Minnehaha County) Medicare plans — local data](https://bigsiouxbenefits.com/sioux-falls-medicare-plans)
- [Sioux Center & NW Iowa (Sioux County) Medicare plans](https://bigsiouxbenefits.com/sioux-center-medicare-plans)
- [South Dakota Medicare Advantage — all 66 counties, county-by-county 2026 data hub](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota)
- [Minnehaha County, SD Medicare Advantage: Complete 2026 Guide — 8 MA plans, 6 at /usr/bin/bash premium, 40,327 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/minnehaha)
- [Pennington County, SD Medicare Advantage: Complete 2026 Guide — 8 MA plans, 3 at /usr/bin/bash premium, 29,973 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/pennington)
- [Lincoln County, SD Medicare Advantage: Complete 2026 Guide — 8 MA plans, 6 at /usr/bin/bash premium, 12,156 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/lincoln)
- [Brown County, SD Medicare Advantage: Complete 2026 Guide — 1 MA plans, 1 at /usr/bin/bash premium, 8,470 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/brown)
- [Lawrence County, SD Medicare Advantage: Complete 2026 Guide — 8 MA plans, 3 at /usr/bin/bash premium, 8,290 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/lawrence)
- [Codington County, SD Medicare Advantage: Complete 2026 Guide — 5 MA plans, 2 at /usr/bin/bash premium, 6,653 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/codington)
- [Meade County, SD Medicare Advantage: Complete 2026 Guide — 8 MA plans, 3 at /usr/bin/bash premium, 6,488 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/meade)
- [Brookings County, SD Medicare Advantage: Complete 2026 Guide — 12 MA plans, 7 at /usr/bin/bash premium, 5,946 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/brookings)
- [Yankton County, SD Medicare Advantage: Complete 2026 Guide — 6 MA plans, 5 at /usr/bin/bash premium, 5,868 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/yankton)
- [Davison County, SD Medicare Advantage: Complete 2026 Guide — 10 MA plans, 6 at /usr/bin/bash premium, 4,804 Medicare beneficiaries, CMS star ratings + enrollment + county health data](https://bigsiouxbenefits.com/medicare-advantage-plans/south-dakota/davison)
- (Every other South Dakota county has its own Complete 2026 Guide — linked from the hub above)
- [Free tools & plan finder](https://bigsiouxbenefits.com/free-tools)
- [Blog index](https://bigsiouxbenefits.com/blog)
- [Blog: Medicare Durable Medical Equipment in Sioux Falls 2026 — Part B DME coverage (walkers, wheelchairs, CPAP, home oxygen, blood glucose monitors, CGMs), 80% Part B payment after $257 deductible with no annual ceiling under Original Medicare, local DME drivers (22.9% arthritis, 37.4% obesity/sleep apnea, 10% diabetes, 5.6% COPD, 5.5% CHD — CDC PLACES 2023 Minnehaha County), supplier assignment and 15% excess charge risk, Medigap Plan G (covers 20% coinsurance + excess charges) vs. Plan N (coinsurance only, no excess), full 8-plan Medigap coverage matrix for Part B cost-sharing, all 5 local PPOs (premiums $0–$80, 3.5★) with annual OOP maximum protection, Part B/Part D benefit-pool split for diabetes equipment vs. insulin, and a 5-point supplier checklist for Sioux Falls' 39,532 Medicare beneficiaries](https://bigsiouxbenefits.com/blog/medicare-dme-equipment-sioux-falls-2026)
- [Blog: Medicare Hospice Benefit in Sioux Falls 2026 — Part A hospice eligibility (6-month prognosis certification, hospice election, waiver of curative treatment), benefit-period structure (two 90-day periods + unlimited 60-day periods, no lifetime cap), covered services ($0 for nursing/physician/social work/counseling/home health aide/equipment, up to $5/Rx for symptom-control drugs, 5% coinsurance for inpatient respite care), Medicare Advantage carve-out rule (hospice always under Original Medicare Part A regardless of MA enrollment; MA premium continues; MA covers unrelated conditions), Medigap plan hospice coverage matrix (Plans A/B/D/G/M/N: 100%; Plan K: 50%; Plan L: 75%), drug split (terminal-condition drugs under Part A ≤$5; other-condition drugs under Part D with $2,100 OOP cap), local conditions driving hospice need (cancer 8.0%, COPD 5.6%, CHD 5.5% — CDC PLACES 2023 Minnehaha County), Sanford and Avera Medicare-certified hospice programs, right to revoke at any time, and 2026 $2,100 Part D cap protection during hospice for Sioux Falls' 39,532 Medicare beneficiaries](https://bigsiouxbenefits.com/blog/medicare-hospice-sioux-falls-2026)
- [Blog: Medicare Cancer & Chemotherapy Coverage in Sioux Falls 2026 — how Medicare splits IV/infused chemotherapy (Part B: 20% coinsurance after $257 deductible, no annual ceiling) from oral chemotherapy (Part D: $2,100 annual out-of-pocket cap, antineoplastics as CMS protected drug class), cancer and co-condition prevalence in Minnehaha County (8.0% non-skin cancer, 10% diabetes, 5.5% CHD — CDC PLACES 2023), preventive cancer screenings at $0 (mammography, colonoscopy, LDCT lung, PSA), Medigap Plan G vs. Plan N for high Part B exposure, full 2026 Sioux Falls MA PPO plan roster (5 plans, $0–$80 premium, $300–$615 drug deductible, all 3.5★), Sanford USD Medical Center (5★ CMS) vs. Avera McKennan (4★ CMS) oncology network guide, and the 5-step cancer-coverage planning checklist for 2026 AEP](https://bigsiouxbenefits.com/blog/medicare-cancer-chemotherapy-sioux-falls-2026)
- [Blog: Medicare Home Health Care in Sioux Falls 2026 — what Original Medicare covers ($0 coinsurance for skilled nursing, PT, OT, speech therapy, home health aide when skilled care concurrent; 20% for DME), the four eligibility gates (physician order, homebound status, skilled-care need, Medicare-certified agency), the custodial-care gap (24-hour care, personal-care-only, meal delivery NOT covered), Minnehaha County health profile (22.9% arthritis, 5.6% COPD, 5.5% CHD, 31.7% hypertension, 10% diabetes from CDC PLACES 2023), how the homebound rule works (brief absences allowed; functional burden test), how Medicare Advantage PPOs must match the Original Medicare skilled home health floor plus possible supplemental benefits, Medigap Plan G/N coverage of Part A deductible ($1,632/benefit period) and SNF coinsurance ($204/day days 21–100) before home health begins, and the $2,100 Part D cap for medications during a home health episode](https://bigsiouxbenefits.com/blog/medicare-home-health-care-sioux-falls-2026)
- [Blog: Medicare Part D Drug Formulary Tiers in Sioux Falls 2026 — formulary tier 1–5 framework (preferred generic → specialty), how tiers determine copay and whether the $615 deductible applies, drug deductible comparison across all 5 Sioux Falls PPOs ($300–$615), the $2,100 Part D OOP cap as the annual backstop, why Minnehaha County's 10% diabetes and 31.7% hypertension rate make formulary review critical, $35 monthly insulin cap (Inflation Reduction Act), CMS six protected drug classes (immunosuppressants, antidepressants, antipsychotics, anticonvulsants, antiretrovirals, antineoplastics), IRMAA Part D income surcharges, step-by-step formulary review guide for October 15 AEP](https://bigsiouxbenefits.com/blog/medicare-part-d-formulary-tiers-sioux-falls-2026)
- [Blog: Medicare Special Enrollment Periods in Sioux Falls 2026 — 8 SEP triggers (moving, losing employer coverage, qualifying for Extra Help/LIS, plan termination, 5-star plan SEP, D-SNP eligibility change, incarceration release, exceptional circumstances), 2-month window rules, why the 5-star year-round SEP is unavailable in Minnehaha County in 2026 (all 5 standard PPOs at 3.5★), the quarterly LIS SEP for Extra Help beneficiaries, TrOOP accumulator transfer when switching Part D mid-year, full 2026 Sioux Falls PPO roster (5 plans, $0–$80 premium, $300–$615 drug deductible, all 3.5★), Part D $2,100 OOP cap interaction, enrollment window comparison table (AEP/OEP/SEP/IEP), and CMS 42 CFR §§ 422.62, 423.38 citations](https://bigsiouxbenefits.com/blog/medicare-special-enrollment-periods-sioux-falls-2026)
- [Blog: Medicare Mental Health Coverage in Sioux Falls 2026 — 22.3% depression prevalence in Minnehaha County (CDC PLACES 2023), Part B outpatient mental health covered services (individual/group/family therapy, psychiatric evaluation, medication management at 80/20 after $257 deductible, no annual visit cap), $0 preventive depression screening, annual Part B 20% coinsurance exposure with no ceiling under Original Medicare, illustrative cost scenarios, 190-day lifetime limit for freestanding psychiatric hospitals vs. no limit at Sanford USD and Avera McKennan general hospital psychiatric units, federal mental health parity rule for all 5 Sioux Falls PPOs, full 2026 MA PPO plan roster (premiums $0–$80, drug deductibles $300–$615, all 3.5★), Part D protected-class formulary rules for antidepressants and antipsychotics, the $2,100 Part D cap for polypharmacy, Sanford 5★ vs. Avera 4★ behavioral health network guide](https://bigsiouxbenefits.com/blog/medicare-mental-health-sioux-falls-2026)
- [Blog: Medicare Part B Outpatient Costs in Sioux Falls 2026 — $257 annual deductible + 20% coinsurance with no annual ceiling under Original Medicare, IRMAA Part B premium brackets (standard $185/mo to $628.90/mo at top tier), why Minnehaha County's 31.7% hypertension and 10% diabetes rate drives repeat outpatient exposure for 39,532 local beneficiaries, Medigap Plan G (100% of 20% coinsurance after deductible) vs. Plan N ($20 office copay), Medicare Advantage MOOP ceiling, the guaranteed-issue Medigap window at 65, Sanford USD 5★ vs. Avera McKennan 4★ for outpatient care, and a cost-scenario table showing $1,257–$10,257 OOP at different spending levels](https://bigsiouxbenefits.com/blog/medicare-part-b-outpatient-sioux-falls-2026)
- [Blog: Medicare I-SNP Plans for Nursing Home Residents in Sioux Falls 2026 — Sanford's 2 Great Plains Institutional SNP plans (H1787-001 $12/mo $615 deductible; H1787-002 $72/mo $0 deductible), both unrated new contracts, I-SNP vs D-SNP comparison, Original Medicare SNF daily coinsurance ($204/day days 21–100), 23-county statewide footprint (1 carrier), HMO network and facility participation requirements, Medicaid coordination for dual-eligible nursing home residents, Part D $2,100 cap, and what to watch when CMS releases first star ratings in October 2026](https://bigsiouxbenefits.com/blog/medicare-isnp-nursing-home-sioux-falls-2026)
- [Blog: Medicare Part A Hospital Costs in Sioux Falls 2026 — benefit period deductible ($1,632/benefit period, resets after 60-day gap), days 61–90 coinsurance ($408/day), lifetime reserve days ($816/day, 60 total), SNF coverage rules (3-day inpatient qualifier, days 21–100 at $204/day, day 101+ uncovered), Original Medicare's no annual cap problem, Minnehaha County hospital risk profile (5.5% coronary heart disease, 5.6% COPD, 31.7% hypertension), Sanford USD 5★ vs Avera McKennan 4★, full Medigap coverage matrix for Part A gaps (Plans A–N), Plan G vs. Plan N comparison, the observation-status trap, and how Medicare Advantage's annual MOOP replaces benefit-period deductibles for Sioux Falls' 39,532 beneficiaries](https://bigsiouxbenefits.com/blog/medicare-part-a-hospital-costs-sioux-falls-2026)
- [Blog: Medicare Supplement Insurance in South Dakota 2026 — Plan G vs. Plan N standardized coverage matrix, Original Medicare's cost-sharing gaps ($1,632 Part A deductible/benefit period, $204/day SNF coinsurance, unlimited 20% Part B), how Medigap fills each gap, the 6-month guaranteed-issue OEP at 65, Plan G vs. Plan N break-even math, excess-charge risk in SD, and how Medigap compares to Sioux Falls' 5 local Advantage PPOs for 39,532 local beneficiaries](https://bigsiouxbenefits.com/blog/medigap-supplement-plans-south-dakota-2026)
- [Blog: Sanford vs. Avera — How Sioux Falls' Two Health Systems Shape Your 2026 Medicare Plan Choice — CMS hospital star ratings (Sanford USD 5★, Avera McKennan 4★), which PPO plans are Sanford-backed (Align ChoicePlus $0/$350 deductible, Align ChoiceElite $66/$300) vs. both-systems accessible (Aetna, Wellmark), the PPO out-of-network safety net explained, Minnehaha County chronic-condition profile (31.7% hypertension, 10% diabetes, 22.9% arthritis), statewide carrier footprints, and how the $2,100 Part D cap interacts with network choice](https://bigsiouxbenefits.com/blog/sanford-avera-medicare-network-sioux-falls-2026)
- [Blog: Medicare's Free Preventive Benefits in Sioux Falls 2026 — Annual Wellness Visit ($0, once per calendar year after first 12 months of Part B), Welcome to Medicare Visit (one-time IPPE, within first 12 months), full preventive screening schedule (cardiovascular every 5 years, diabetes up to 2×/year, depression annual, BMI counseling annual, lung cancer LDCT annual for eligible smokers, mammography annual, colorectal screening, bone density every 2 years, smoking cessation 8 sessions/year), Minnehaha County health profile (31.7% hypertension, 10% diabetes, 22.3% depression, 37.4% obesity — all covered by Medicare screenings), 5 local PPOs required to cover all preventive benefits at $0, Sanford 5★ vs Avera 4★ preventive care access, 2026 Part D $2,100 cap for medications that follow a preventive workup](https://bigsiouxbenefits.com/blog/medicare-preventive-benefits-sioux-falls-2026)
- [Blog: Medicare Open Enrollment Period in Sioux Falls 2026 — Jan 1–Mar 31 second-chance window for current MA enrollees: who qualifies, one-switch rule, OEP vs. AEP vs. GEP comparison table, OEP timing (Jan→Feb 1, Feb→Mar 1, Mar→Apr 1), full 5-PPO Sioux Falls plan roster (premiums $0–$80, deductibles $300–$615, all 3.5★), the Sanford-vs-Avera network fork, Part D deductible reset explained, the $2,100 cap context, and what you cannot do during the OEP](https://bigsiouxbenefits.com/blog/medicare-oep-sioux-falls-2026)
- [Blog: Medicare Savings Programs in South Dakota 2026 — QMB (pays Part A & B premiums + cost-sharing, income ≤100% FPL), SLMB & QI (Part B premium, 100–135% FPL), Extra Help / LIS (waives Part D $615 deductible, reduces copays, eliminates late-enrollment penalty), D-SNP plan comparison for dual eligibles (4 plans, UHC 4.5★ / Aetna 3.5★), how to apply through SD DSS and SSA, and benefit-stacking with the 2026 $2,100 Part D cap](https://bigsiouxbenefits.com/blog/medicare-savings-programs-south-dakota-2026)
- [Blog: Medicare Late-Enrollment Penalties in Sioux Falls 2026 — permanent Part B 10%/year and Part D 1%/month penalty math, the COBRA trap, GEP fallback window (Jan 1–Mar 31, coverage July 1), IRMAA + LEP stacking table, Extra Help / LIS penalty waiver, and the 2026 $2,100 Part D cap interaction](https://bigsiouxbenefits.com/blog/medicare-late-enrollment-penalties-sioux-falls-2026)
- [Blog: Medicare Star Ratings Explained for Sioux Falls 2026 — what CMS star ratings measure (5 domains, double-weight CAHPS), the complete 2026 Minnehaha County plan roster with ratings (all 5 standard PPOs at 3.5★, UHC D-SNPs at 4.5★, 2 unrated I-SNPs), hospital quality ratings (Sanford 5★, Avera 4★), the 5-star SEP explained, CMS termination rules for low-rated plans, and how to use star ratings in your plan decision](https://bigsiouxbenefits.com/blog/medicare-star-ratings-sioux-falls-2026)
- [Blog: Moving and Medicare in South Dakota 2026 — county plan-count spread (1 to 14 plans across SD's 66 counties), Iowa cross-border comparison (Sioux County IA: 21 plans, 6 at $0 vs. Minnehaha County SD: 11 plans), carrier county footprints, Special Enrollment Period for relocating beneficiaries, and Medigap as the portable alternative](https://bigsiouxbenefits.com/blog/medicare-moving-south-dakota-2026)
- [Blog: What $0 Medicare Advantage Plans in Sioux Falls Really Cost You in 2026 — true-cost analysis: Part B premium ($185+/mo) still applies, drug deductibles up to $615, IRMAA surcharge table across 6 income tiers, the $2,100 Part D cap as the real backstop, Sanford-vs-Avera network impact, and who is/isn't a good fit for a $0 plan](https://bigsiouxbenefits.com/blog/zero-premium-medicare-advantage-sioux-falls-2026)
- [Blog: IRMAA and Medicare Part B Costs in Sioux Falls 2026 — IRMAA surcharge brackets (all 6 tiers, 2025 CMS/SSA schedule), the 2-year income lookback, how a $0-premium MA plan still leaves you owing Part B IRMAA, Part D IRMAA surcharges, appeal process (SSA Form SSA-44, Life-Changing Events), and how IRMAA stacks on the 2026 $2,100 Part D cap](https://bigsiouxbenefits.com/blog/irmaa-medicare-part-b-sioux-falls-2026)
- [Blog: Working Past 65 Medicare in Sioux Falls 2026 — Medicare Secondary Payer rules (large vs. small employer, 20-employee threshold), the 8-month Special Enrollment Period after employer coverage ends, permanent Part B penalty (10%/year), why COBRA doesn't delay Medicare, Part D creditable coverage, and the 11-plan local landscape when you enroll](https://bigsiouxbenefits.com/blog/medicare-working-past-65-sioux-falls-2026)
- [Blog: Medicare for Chronic Conditions in Sioux Falls 2026 — how CDC PLACES data (31.7% hypertension, 10% diabetes, 22.9% arthritis) should drive Medicare plan selection; the 5 local PPOs; $2,100 Part D cap for multi-medication households; Sanford vs. Avera specialist networks; D-SNP eligibility](https://bigsiouxbenefits.com/blog/medicare-chronic-conditions-sioux-falls-2026)
- [Blog: Medicare Cost Plans in Sioux Falls 2026 — what Medica's 4 Cost plans are, how they differ from Medicare Advantage (out-of-network Original Medicare rates, no extra plan charge), 2026 premiums $58.70–$334.70, and who should consider them over a $0-premium MA PPO](https://bigsiouxbenefits.com/blog/medicare-cost-plans-sioux-falls-2026)
- [Blog: Medicare Dental, Vision & Hearing in Sioux Falls 2026 — Original Medicare coverage gaps for dental, vision, and hearing; why Minnehaha County's diabetes and chronic-condition profile makes these gaps meaningful; how to evaluate the 5 local PPOs for dental, vision, and hearing extras](https://bigsiouxbenefits.com/blog/medicare-dental-vision-hearing-sioux-falls-2026)
- [Blog: Veterans & Medicare in Sioux Falls 2026 — VA benefits vs. Medicare coordination, 5-star VA Medical Center limits, Part B penalty trap, Part D creditable coverage break, 11 local plans, D-SNP eligibility](https://bigsiouxbenefits.com/blog/veterans-medicare-sioux-falls-2026)
- [Blog: 2026 Part D $2,100 drug cost cap explained — how the new out-of-pocket ceiling works, who benefits most, formulary tiers vs. premiums, and the Sioux Falls drug plan landscape](https://bigsiouxbenefits.com/blog/part-d-drug-cost-cap-sioux-falls-2026)
- [Blog: Medigap vs. Medicare Advantage in Sioux Falls 2026 — two-track comparison, 5 local PPOs, Sanford-vs-Avera network question, $2,100 Part D cap, guaranteed-issue window](https://bigsiouxbenefits.com/blog/medigap-vs-medicare-advantage-sioux-falls-2026)
- [Blog: Medicare Annual Enrollment Period in Sioux Falls 2026 — Oct 15–Dec 7 AEP action plan (11 local plans, Part D $2,100 cap, ANOC guide, Sanford vs Avera network check)](https://bigsiouxbenefits.com/blog/medicare-aep-sioux-falls-2026)
- [Blog: Turning 65 in Sioux Falls 2026 — Medicare enrollment roadmap (7-month IEP window, the 4 parts, local plan landscape, 2026 Part D $2,100 cap, Sanford vs Avera)](https://bigsiouxbenefits.com/blog/turning-65-sioux-falls-2026)
- [Blog: 2026 Medicare Advantage in South Dakota — 38 plans, 9 carriers, county-by-county data](https://bigsiouxbenefits.com/blog/2026-medicare-advantage-south-dakota)
- [Blog: Medicare Advantage in Sioux Falls 2026 — all 15 plans ranked, premiums, deductibles, star ratings](https://bigsiouxbenefits.com/blog/medicare-advantage-sioux-falls-2026)
- [Blog: D-SNP plans in Sioux Falls 2026 — dual-eligible plan stability & cancellation risk](https://bigsiouxbenefits.com/blog/dsnp-sioux-falls-2026-plan-changes)
- [About](https://bigsiouxbenefits.com/about)
- [Contact / book a free consultation](https://bigsiouxbenefits.com/contact)

## Tools (agent-callable)
- [WebMCP manifest](https://bigsiouxbenefits.com/.well-known/mcp.json): callable tools + endpoint.
- [MCP endpoint](https://bigsiouxbenefits.com/mcp): JSON-RPC 2.0 (initialize, tools/list, tools/call).
- `medicare_search_plans`: find & rank Medicare Advantage plans by ZIP (premium, star rating, drug deductible, max out-of-pocket).
- `medicare_compare_plans`: compare 2–5 plans by ContractPlanID.

## Data
- Source: CMS Plan Year 2026 Medicare Advantage / Part D Landscape public-use files.
- Estimates only; verify with a licensed agent before enrolling. Not affiliated with the U.S. government.