$75 to $500 per month Range between $75 per month to $500 per month depending on those factors.
The Medicare Rights Center notes that in Albany, N.Y., the monthly costs of premiums for a Plan A medigap policy varied from $98.20 to $267.99. Prices also differ by jurisdiction. One insurance company's Plan A charged $170 in Albany and $208 in Long Island.  The average cost for the most popular medigap policy, called Plan F, is $1,813 a year for a 65-year-old woman, according to Weiss Ratings -- just a little less than the $2,052 your mom is paying now. Older policyholders with richer policies generally pay more.  The average cost of Medigap Insurance will depend on your age, what state you live in, your smoking status and which Medigap Insurance Plan you have. Medigap Plans can range between $75 per month to $500 per month depending on those factors. The average cost of Medigap Insurance will be different in different states. For example, Texas, South Carolina, North Carolina and Colorado are usually less expensive than South Florida. However, North Florida will generally be less expensive than South Florida. The cost of a Medigap plan will be determined by several factors-your age, your gender, your zip code, any tobacco usage, and if you and a spouse are applying together (some carriers offer a household discount on their rates when spouses apply for coverage at the same time). 1 Although the coverage is standardized by plan category, premium costs vary widely between insurance companies and even within the same insurance company by region. 2  Premiums for Medigap plans might cost $300-$6,200 or more a year, depending on the insurance company, what's included under the plan and local rates. 1 See How Much Does Medicare Part A Cost. 2  The standard monthly premium for Medicare Part B in 2012 is $99.90, but it can be $139.90 -$319.70 a month if total income is more than $85,000 for a single person or $170,000 for a married couple. 3  See How Much Does Medicare Part B Cost. The average annual premium for the most popular type of Medigap insurance is around $2,000. However, these premiums can range from $500 to $10,000 for the same exact coverage. No joke! And sometimes you may find there are some very specific coverages and exclusions for Medigap policies.  For a Medigap plan, you pay a monthly premium to the insurance company in addition to your Medicare Part B premium. The cost of your Medigap policy depends on the type of plan you buy, the insurance company, your location, and your age. A standardized Medigap policy is guaranteed renewable -- even if you have health problems -- if you pay your premiums on time. In general, 2012 data shows that the average cost of Medical supplemental insurance for the most basic plans is somewhere in the neighborhood of $130 to $210 per month while the most expensive plans can go as high as $400 per month. Likewise, estimates put the annual payment increase to be 5 to 6%.  1 Premiums for Medigap plans might cost $300-$6,200 or more a year, depending on the insurance company, what's included under the plan and local rates. 2  Search the Medicare Plan Finder tool by zip code for Medigap plan availability and pricing in a specific area. 1 See How Much Does Medicare Part A Cost. 2  The standard monthly premium for Medicare Part B in 2012 is $99.90, but it can be $139.90 -$319.70 a month if total income is more than $85,000 for a single person or $170,000 for a married couple. 3  See How Much Does Medicare Part B Cost. Lillasam/iStock/Getty Images. Medigap is insurance against medical expenses that are not covered by original Medicare. What you pay for a Medigap policy depends on the coverage, your general health and especially where you live. You will likely pay $21 to $44 a month for the least expensive plan. The cost of Medigap policies can vary widely. There can be big differences in premiums that insurance companies charge for exactly the same coverage. As you shop for a Medigap policy, be sure you are comparing the same Medigap policy (for example, compare a Plan A from one company with Plan A from another company). 
http://www.aarp.org/health/medicare-insurance/info-12-2012/health-care-costs.html http://www.kiplinger.com/article/retirement/T039-C001-S001-comparing-medigap-policy-costs.html http://www.insurancelibrary.com/medicare-insurance/what-is-the-average-cost-of-medigap-insurance http://personalfinance.costhelper.com/medigap-insurance.html https://www.sharecare.com/health/medicare-insurance/how-much-medigap-insurance-cost http://www.webmd.com/health-insurance/insurance-basics/medigap http://www.medigapcost.com/average-cost-of-supplemental-medicare-insurance.shtml http://personalfinance.costhelper.com/medigap-insurance.html http://www.ehow.com/info_8701150_average-cost-medigap-plan-insurance.html https://www.medicare.gov/find-a-plan/staticpages/learn/how-insurance-companies-price-policies.aspx
typical medigap insurance costs