Audience guide · Roaring Fork Valley, Colorado · Plan year 2026

Medicare before 65 on disability in 2026: the 24-month wait, what you pay, and Colorado's Medigap rule for the Roaring Fork Valley

About one Medicare beneficiary in ten nationally is under 65 and on Medicare because of a disability. In Pitkin, Garfield and Eagle counties that was 788 people in 2025. The rules they live under are mostly the same as everyone else's, with three big exceptions: when coverage starts, what Colorado requires Medigap companies to do for them, and what happens if they go back to work. This guide covers all three.

Bemis Insurance Data Desk

Reviewed by Trinity Bemis, Licensed Insurance Broker & Medicare Specialist (NPN 21424070) · Published 2026-10-02

The short answer

If you are under 65 and receive Social Security Disability Insurance, Medicare Part A and Part B begin automatically after 24 months of disability benefits. You pay the same premiums, deductibles and coinsurance as a 65-year-old. In Colorado, unlike most of the country, Medigap companies must sell you any policy they offer, without health questions, during the six months beginning with your first month of Part B. Medicare Advantage plans are open to you where they exist, Part D works the same way, and returning to work does not end your Medicare for years.

Medicare's own handbook puts the first rule plainly: "If you're under 65 and have a disability, you'll get Part A and Part B automatically after getting 24 months of disability benefits, either from Social Security or certain disability benefits from the RRB." Everything else in this article is detail on top of that sentence — and on top of a Colorado regulation that most people, including many who have had Medicare for years, have never heard of.

Sources: Medicare.gov — Medicare & You 2027, the official U.S. government Medicare handbook (CMS Product No. 10050, September 2026) · Medicare.gov — Medicare costs (plan year 2026) · Colorado Secretary of State — 3 CCR 702-4, Division of Insurance Regulation 4-3-1, Minimum Standards for Medicare Supplement Policies, Section 10 (Open Enrollment) · CMS — Medicare Monthly Enrollment (data.cms.gov), calendar year 2025, retrieved October 2, 2026.

When does Medicare start if I am on SSDI?

Three different clocks apply, depending on why you qualify. Most people are on the first one.

Sources: CMS.gov — Original Medicare (Part A and B) Eligibility and Enrollment · Medicare.gov — Medicare & You 2027, the official U.S. government Medicare handbook (CMS Product No. 10050, September 2026), page 15 · Medicare.gov — End-Stage Renal Disease (ESRD).

Why it feels longer than two years. Social Security disability cash benefits do not begin on the day you became disabled. Social Security applies a five-month waiting period first (waived for ALS claims approved on or after July 23, 2020). Medicare's 24 months start counting from the first month you are entitled to benefits, not from the onset date and not from the day your claim was approved. So a person whose disability began in January 2024 would typically be entitled to cash benefits from June 2024 and would see Medicare begin June 2026 — about 29 months after onset. If a claim took a year to approve and was paid retroactively, those back months still count toward the 24.

What the start looks like in practice. Because enrollment is automatic, your Medicare card arrives in the mail before coverage begins. Part B's premium starts coming out of your disability check that month. If you are covered by a spouse's employer plan and want to turn Part B down, the instructions come with the card; the next section explains when that is and is not a good idea.

ESRD is different in two more ways. Medicare based only on kidney failure ends 12 months after the month you stop dialysis or 36 months after the month of a successful transplant, and resumes if you need dialysis or another transplant again. And if you have employer coverage, Medicare's handbook says the group health plan pays first for the first 30 months of Medicare eligibility, then Medicare pays first.

Sources: Social Security — Is there a waiting period for Social Security Disability Insurance benefits? · Medicare.gov — End-Stage Renal Disease (ESRD) · Medicare.gov — Medicare & You 2027, the official U.S. government Medicare handbook (CMS Product No. 10050, September 2026), "Who pays first" table. The 29-month example is an illustration of how the two waiting periods stack; your own dates come from Social Security.

What does Medicare cost before 65?

Exactly what it costs after 65. There is no under-65 discount and no surcharge. Medicare.gov's 2026 cost page even addresses the question directly for Part A: "If you get Medicare earlier than age 65, you won't pay a Part A premium."

Source: Medicare.gov — Medicare costs (plan year 2026). Part D cap from the CMS Part D redesign parameters covered in our Part D out-of-pocket cap guide. Amounts are for plan year 2026; 2027 Part A and Part B amounts had not been announced when this was published.

Two programs matter more for this group than for retirees, because disability benefits are often modest. Medicare Savings Programs, run through Health First Colorado, can pay the Part B premium and in some cases the deductibles and coinsurance; our Medicare Savings Programs guide has the 2026 limits. Extra Help lowers Part D costs and removes the Part D late penalty; see our Extra Help guide. In 2025, CMS counted 1,230 people in Garfield County, 397 in Eagle County and 132 in Pitkin County who had both Medicare and Medicaid, a group that includes many under-65 beneficiaries.

Source: CMS — Medicare Monthly Enrollment (data.cms.gov), calendar year 2025 dual-eligible counts by county, retrieved October 2, 2026.

Should I keep Part B if I have other coverage?

Most people on disability should keep it. The exception is narrow and depends on the size of the employer behind your other coverage.

Medicare's handbook has a table on who pays first. For someone "under 65 with a disability" who has employer coverage from their own or a family member's current job, the rule turns on 100 or more employees: at that size, the employer plan pays first and Medicare pays second, so delaying Part B can be reasonable. If the employer has fewer than 100 employees, Medicare pays first — which means that without Part B, the employer plan may pay only what it would have paid after Medicare, leaving you with the rest. COBRA, retiree coverage and Marketplace plans do not count as current employment coverage and do not protect you from the Part B late enrollment penalty.

The penalty is permanent in most cases: 10% of the standard premium for every full 12 months you could have had Part B and did not, added for as long as you have Part B. Our Part B late enrollment penalty guide runs the numbers, and our employer coverage guide explains the Special Enrollment Period that lets you add Part B later without penalty if you did have qualifying coverage. The thresholds are different for people under 65 (100 employees) than for people 65 and over (20 employees), and getting that one number wrong is the most common Part B mistake we see in this group.

Source: Medicare.gov — Medicare & You 2027, the official U.S. government Medicare handbook (CMS Product No. 10050, September 2026), "Who pays first" table and Part B late enrollment penalty section.

Can I buy a Medigap policy before 65 in Colorado?

Yes — and this is where living in Colorado changes the answer. Start with the federal baseline, in Medicare's own words from the March 2026 Medigap guide: "If you're under 65 and have Medicare because of a disability or ESRD, you might not be able to buy the Medigap policy you want, or any Medigap policy, until you turn 65. Federal law generally doesn't require insurance companies to sell Medigap policies to people who are under 65." The guide then lists the states that do require it. Colorado is on the list.

What Colorado actually requires. Colorado Division of Insurance Regulation 4-3-1 governs Medicare supplement policies in the state. Section 10, "Open Enrollment," has two parallel rules. Subsection A is the familiar one for people turning 65. Subsection B covers everyone else:

"No issuer shall deny or condition the issuance or effectiveness of any Medicare supplement policy or certificate available for sale in this state, nor discriminate in the pricing of that policy or certificate because of the health status, claims experience, receipt of health care or medical condition of an applicant under age sixty-five (65), if the application for the policy or certificate is submitted prior to or during the six (6)-month period beginning with the first day of the first month during which the applicant becomes enrolled for benefits under Medicare Part B, without regard to age."

Read slowly, that sentence does four things:

• Every plan, not just Plan A. The rule covers "any Medicare supplement policy ... available for sale in this state," and subsection D adds that each policy "currently available from an issuer shall be made available to all applicants" the issuer is required to cover. The benefit charts the regulation requires companies to use even carry the line: "In Colorado, it is a requirement that all plans offered by [Issuer] are available to under age 65 Medicare qualified individuals." If a company sells Plan G or Plan N to 65-year-olds in Colorado, it must sell it to you.
• No health questions during the window. A company may not deny you, delay you or price you on health status, claims or medical condition. The window is the six months beginning with your first month of Part B — the same length as the federal window at 65 — and you can apply before it opens so the policy starts the day Medicare does.
• Premiums can be higher, but there is a ceiling. The regulation does not force companies to charge under-65 buyers the age-65 rate. Subsection E requires each company to show it either charges under-65 applicants no more than "the highest available premium rate for each plan, type, and form level," applies the same premium adjustment it applies to people over 65, or, for a brand-new product, charges 1.5 times the age-65 rate. In plain terms, the under-65 rate may be higher than what a 65-year-old pays, and it varies by company, which is exactly why comparing companies matters more for this group.
• Companies may not steer you away. Subsection F requires issuers to "actively market" Medicare supplement insurance during the under-65 window, and subsection G forbids "encouraging or directing such persons to refrain from filing an application" or to "seek coverage from another issuer" because of their health. If an agent or a company tells you under-65 applicants are not accepted, that is contrary to Colorado's rule; the Division of Insurance is the place to report it.

Source: Colorado Secretary of State — 3 CCR 702-4, Division of Insurance Regulation 4-3-1, Minimum Standards for Medicare Supplement Policies, Section 10 (Open Enrollment), subsections 10.B, 10.D, 10.E, 10.F and 10.G, and Appendix B. Federal baseline: Medicare.gov — Choosing a Medigap Policy (CMS Product No. 02110, March 2026), Section 6: Medigap policies for people with a disability or ESRD, pages 31–32.

Pre-existing conditions. Section 10.C of the Colorado regulation says a company may not exclude benefits for a pre-existing condition if you apply during the window and have had at least six months of continuous creditable coverage. Medicare itself counts: the federal guide notes that "if you had Medicare for more than 6 months before you turned 65, you may not have a pre-existing condition waiting period." Most people reaching Medicare after the 24-month wait have had other coverage, Medicaid or an employer plan, in the months before, so in practice the waiting period rarely applies.

The second window at 65. The federal guide is explicit: "If you already have Medicare Part B (Medical Insurance), you'll still get a Medigap Open Enrollment Period when you turn 65. You'll probably have more Medigap policy options and be able to get a lower premium at that time." Because under-65 premiums are often higher, people who bought a policy at, say, 52 should plan to shop again in the six months beginning the month they turn 65. Nothing requires you to stay with the company you started with. Our guide to Medigap enrollment windows covers that period and the guaranteed issue situations that can open a door in between.

What a Medigap policy does and does not do. It pays some or all of Original Medicare's deductibles and coinsurance, including the 20% that has no ceiling on its own. It does not cover prescriptions, so you still need a Part D plan. It has a monthly premium that a $0-premium Medicare Advantage plan does not. For a younger beneficiary with an ongoing condition, specialists in Denver or Grand Junction, and years of care ahead, the trade-off often favors predictability and the freedom to see any provider that takes Medicare. For someone else it may not. Our Medigap versus Medicare Advantage comparison lays out both sides.

Sources: Colorado Secretary of State — 3 CCR 702-4, Division of Insurance Regulation 4-3-1, Minimum Standards for Medicare Supplement Policies, Section 10 (Open Enrollment), subsection 10.C · Medicare.gov — Choosing a Medigap Policy (CMS Product No. 02110, March 2026), Section 6: Medigap policies for people with a disability or ESRD, page 32 · Medicare.gov — Get ready to buy a Medigap policy (what if I have Medicare because of a disability or ESRD?).

Medicare Advantage or Original Medicare under 65?

Age is not a condition for joining a Medicare Advantage plan. If you have Part A and Part B and a plan serves your county, you can enroll during the same periods as anyone else — the seven months around your Medicare start, Open Enrollment October 15 to December 7, and the Special Enrollment Periods that apply to you. Medicare.gov's ESRD page says the same for kidney failure: "People with ESRD can choose either Original Medicare or a Medicare Advantage Plan for their Medicare coverage."

In the Roaring Fork Valley the question is less about eligibility than about what exists:

Source: CMS — Medicare Advantage / Part D Landscape files, CY2026 and CY2027, CY2026 Landscape (March 2026 refresh) and CY2027 Landscape (first release, September 2026), count of Medicare Advantage plans that are not Special Needs Plans, as retrieved through the Ambrose Brain on September 30, 2026. CMS may update the 2027 file. Eagle County was not part of that pull. We do not offer every plan available in your area.

Two kinds of plans deserve a specific look from this group. Dual Eligible Special Needs Plans are for people who have both Medicare and Health First Colorado; they coordinate the two programs and typically carry $0 cost sharing for covered services. Whether one serves your county changes year to year — our D-SNP guide explains how to check. Chronic Condition Special Needs Plans are built around specific diagnoses such as diabetes, heart failure or ESRD, where offered. Neither is common on this side of the state, and the Plan Finder at the end of this article shows what is actually available at your ZIP code.

If no Medicare Advantage plan serves your county, as in Garfield, your coverage is Original Medicare plus a stand-alone Part D plan, with a Medigap policy if you want to cap the 20%. That is why the Colorado Medigap rule in the previous section carries more weight here than it would in Denver.

Source: Medicare.gov — End-Stage Renal Disease (ESRD), "What are my coverage options?"

What happens to Medicare if I go back to work?

Fear of losing health coverage keeps many people on disability from trying to work. Social Security's rules are built specifically to remove that fear, in stages. All of the 2026 figures below come from Social Security.