Medigap (Medicare Supplement) plans help pay for out-of-pocket healthcare costs that Original Medicare does not cover, such as copayments, coinsurance, and deductibles. These standardized plans are sold by private insurance companies and are identified by letters (A, B, D, G, K, L, M, N). In New Mexico, Medigap enrollees benefit from strong state-level consumer protections.
Medigap Plans Available in New Mexico
Medigap plans are standardized by the federal government, meaning Plan G from one insurer provides the same benefits as Plan G from another. The only differences between insurers are the premium price, customer service, and claims processing.
| Plan | Part A Coinsurance | Part B Coinsurance | Part A Deductible | Part B Deductible | Part B Excess | Foreign Travel |
|---|---|---|---|---|---|---|
| Plan A | Yes | Yes | No | No | No | No |
| Plan B | Yes | Yes | Yes | No | No | No |
| Plan D | Yes | Yes | Yes | No | No | Yes |
| Plan G | Yes | Yes | Yes | No | Yes | Yes |
| Plan K | Yes | 50% | No | No | No | No |
| Plan L | Yes | 75% | No | No | No | No |
| Plan M | Yes | Yes | 50% | No | No | Yes |
| Plan N | Yes | Yes* | Yes | No | No | Yes |
*Plan N pays 100% of Part B coinsurance except for copays of up to $20 for office visits and up to $50 for ER visits that don't result in admission. Plans C and F are not available to those newly eligible for Medicare on or after January 1, 2020.
New Mexico Medigap Protections
New for 2027: Under Senate Bill 21, starting January 1, 2027, Medigap policyholders age 65 and older get a yearly window of at least 60 days, opening on the first day of their birthday month, to switch to a Medigap plan of equal or lesser value without medical underwriting. It does not apply to people who do not already have Medigap.
Separately, federal law gives everyone a one-time 6-month Medigap Open Enrollment Period that begins when you are both enrolled in Part B and age 65 or older. During this window, insurers cannot deny coverage or charge higher premiums based on pre-existing conditions.
2026 Medigap Out-of-Pocket Limits for Plans K, L, and High-Deductible G/F
Medigap Plans K and L have annual out-of-pocket limits, while Plans F and G have high-deductible versions:
| Plan | 2026 Limit | Notes |
|---|---|---|
| Plan K | $8,000 OOP limit | Then plan pays 100% for the rest of the year |
| Plan L | $4,000 OOP limit | Then plan pays 100% for the rest of the year |
| High-Deductible Plan G | $2,950 deductible | Lower premium but you pay first $2,950 |
| High-Deductible Plan F | $2,950 deductible | Only for those eligible before 2020 |
Which Medigap Plan Is Right for You?
Plan G is the most popular Medigap plan nationwide because it offers comprehensive coverage with the lowest out-of-pocket costs after paying the Part B deductible ($283 in 2026). Plan N is a popular lower-premium option with small copays for office and ER visits.
A licensed agent can help you compare Medigap premiums from multiple insurers in your area. Find a Medigap agent in New Mexico.