Aetna senior supplement provider phone number

Phone: 855-663-2204 option 3, 8 Fax: 855-482-7876 Email: [email protected] Aetna Life Insurance Company P.O. Box 5008 Brentwood, TN 37024 Medical Review Aetna Senior Supplemental Insurance P.O. Box 8 Brentwood, TN 37024-9951 Courier Mailing Address Aetna Life Insurance Company 800 Crescent Centre Drive, Ste. 200 Franklin, TN 37067

Aetna knows transportation availability, cost and time can prevent members from getting medical care in a timely and efficient way. 1 in 4 people miss appointments due to transportation problems. 1 That's one reason why, in its first 21 months, Aetna's transportation program provided nearly 1,100 rides to Medi-Cal members. And we're ...Enter provider or facility name or select a specialty; Enter ZIP code, city or county; Aetna Better Health of Nevada members can use our online provider search. You can also call Aetna Better Health of Nevada at 1-866-815-3732 or TTY 711 to request a hard copy of the Provider Directory. The online Provider and Pharmacy Directory is updated at ...Call us at 1-800-358-8749 (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. For members. Call us at 1-888-624-6290 (TTY: 711), Monday to Friday, 7 AM to 7 PM CT. Learn more about Medicare Supplement (Medigap) plans offered in New Mexico.Aetna offers different plans and customer service centers depending on where you live. Call us at 1-800-282-5366 ${tty} . 7 days a week, 8 AM to 8 PM Review our Medicare Supplement Insurance plans. 87% of Aetna® Medicare Advantage members are in 4-star plans or higher for 2024. Every year, Medicare evaluates plans based on a 5-star rating system. Read the latest press release on our Star Ratings for 2024 and our ongoing commitment to improving health outcomes for members. Check license status. Set up direct deposit. Get reporting. And more. Register now. About Producer World Security/Encryption. Feedback. Insurance agents and brokers, log in to Producer World to get quotes, find compensation information, check license status, setup direct deposit and more.Need technical assistance with website secure portal sign up? Email Us or call a website technician at 1-800-587-5139, Monday through Friday, 8 AM to 5 PM CT. *Includes all products underwritten by American Continental Insurance Company (ACI) and Continental Life Insurance Company of Brentwood, Tennessee (CLI), both Aetna Companies; Medicare ...Aetna members, you can Log in or Register for the Aetna Navigator secure member website to manage your benefits--view claims, find a doctor, check eligibility information, order ID cards and more--and contact us in a secure environment. If you prefer to contact Member Services with this public form, please complete the information below. We …

Contact us For insureds. If you are an individual covered by an Allstate Benefits accident, critical illness, hospital indemnity, or other voluntary insurance policy or certificate, please call our Customer Care Center 8 a.m. to 8 p.m. ET, Monday through Friday, at: . 1-800-521-3535. 1-800-211-5533 *Se Habla Español. If you are an individual seeking information about an Allstate homeowners or ...Call us at 1-800-358-8749 (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. For members. Call us at 1-888-624-6290 (TTY: 711), Monday to Friday, 7 AM to 7 PM CT. Learn more about Medicare Supplement (Medigap) plans offered in Texas. 877 825.9337 or [email protected]. Website technical assistance team. For assistance with any website technical issues, please contact us as indicated below. (All other inquiries should be directed to one of the other teams.) 800 587.5139 (Monday - Friday, 8:00am – 5:00pm CST) or [email protected]. As technology continues to advance, it becomes increasingly important for seniors to have access to reliable and easy-to-use cellular phones. One of the main reasons why Consumer C...Providers who click the Account Sign In button below are agreeing to the Provider Terms and Conditions. If you've forgotten your Username, or for additional assistance, please contact Customer Service at 877.927.1112. If your Medicare Supplement Policy was issued by Aflac Tier One in or after 2022, call us at 833.692.5692. If your Medicare Supplement Policy was issued on or after 10/01/2012, call us at 855.207.2078. If your Medicare Supplement Policy was issued prior to 10/01/2012, call us at 800.992.3522. SHARE. As you age, having dental, vision and hearing care is vital to your total health and well-being. Neglecting these areas may be linked to other health problems, such as heart issues, dementia, depression and increased risk of falls. One major benefit of Medicare Advantage (MA) is that many plans offer coverage for your eyes, ears and teeth.

Aetna Provider Tax Line 855-849-7539 or 860-273-8400; ... Just enter your mobile number and we’ll text you a link to download the Aetna Health℠ app from the App Store or on Google Play. ... (June 1987), as applicable, and any applicable agency FAR Supplements, for non-Department of Defense Federal procurements. ...Medicare Supplement Plan F through Accendo Insurance Company is one of the most highly sought-after Medigap plans. This is due to its full coverage benefits. However, you are only eligible to enroll in this plan if you were eligible prior to 1/1/20. Anyone new to Medicare after this date will not be able to enroll in Medigap Plan G through any ... Washington National Insurance Company (Medicare Supplement) for: Physicians, Health Care Professionals, Providers Aetna Senior Supplemental Insurance* Call Center Directory * Aetna Senior Supplemental Insurance owns and/or administers the companies included above. Virtual Credit Card (VCC) payment enrollment helpline Electronic Funds Transfer ... Whether you are a member, a provider, an employer, a broker, or a media representative, you can find the best way to contact Aetna on this page. You can also access the online chat, the FAQs, the mailing address, and the social media links. Aetna is committed to helping you achieve your health goals and answer your questions.PROVIDER'S TAX ID NUMBER: * PROVIDER'S PHONE #: * REQUESTED BY: * Aetna Senior Supplemental Insurance includes: all products underwritten by American Continental Insurance Company(ACI) and Continental Life Insurance Company of Brentwood, Tennessee(CLI), both Aetna companies; Medicare Supplement underwritten by Aetna …Aetna Senior Supplemental Insurance Home Office Directory Phone: (800) 264.4000 option 3, 5 Fax: (855) 816.4835 Email*: [email protected] Aetna Senior Supplemental Insurance c/o Commissions 800 Crescent Centre Dr., Ste. 200 Franklin, TN 37067 - Commission questions - Commission statements - 1099 forms Commissions …

New jersey motor vehicle commission roosevelt place somerville nj.

view the status of a claim • get patient eligibility submit or inquire on a referral • find Clinical Policy Bulletins, • review claim payment policies and code editing logicMedicare Supplement insurance or Medigap plans have unique features that benefit many seniors: Predictable costs. Freedom to choose any doctor or hospital that accepts Medicare. Freedom to see any specialist that accepts Medicare without a referral. Security of the same type of benefits year after year. Guaranteed renewable coverage.Here's how it works: Step 1. First, you can request participation in the Aetna network by completing our online request for participation form. Step 2. Next, we’ll evaluate the current need to service our membership in your area. We don’t want you to wait, so we’ll make sure to let you know within 45 days whether you’re eligible for ...Aetna Senior Supplemental Insurance Effective 9/17/12 Home Office Contact Sheet For Agents www.aetnaseniorproducts.com Hours (CST) ACI Med Supp CLI Med Supp ACI Final Expense CLI Complementary New Business (M-F: 7:30a-4:30p) Case Management (M-F: 7:30a-4:30p) Direct all correspondence and make all checks payable to the appropriate underwritingProviderPayments.com is the online portal that lets you access and manage your provider payments from ECHO Health, Inc. You can view your transactions, reports, and ...

Member's Group Number (Optional) Member's First Name . Member's Last Name . Member's Birthdate (MM/DD/YYYY) Provider Name . TIN/NPI . Provider Group (if applicable) Contact Name and Title . Contact Address (Where appeal/complaint resolution should be sent) ... Aetna-Provider Resolution Team PO Box 14020 Lexington, KY 40512 . Or use our ...Apr 23, 2024 · Medicare Supplement Insurance plans. 1-800-358-8749 (TTY: 711), Monday to Friday, 8 AM to 8 PM ET. Enter 10-digit TIN Contact Phone Number - no hyphens or spaces. Enter 9-digit Tax Identification Number (TIN) - no hyphens or spaces. An ECHO Draft Number can be found on any ECHO payment. It is a 9 or 10-digit number, starting with a 1, 2 or 3. It is listed as an EPC Draft Number, the Check number or a Trans Nbr on your Explanation of Payment.If you're sick or injured, your bills can add up. Supplemental health plans put some money back in your pocket. You get cash benefits to help pay for the costs your medical plan doesn't cover, like copays and deductibles. Or you can use the cash to cover mortgage payments, groceries, utility bills and day care. Life happens.Here's a list of airline phone numbers for many major airlines, along with their departments such as customer service and reservations. We may be compensated when you click on prod...Welcome to UnitedHealthcare's online provider tool, a resource available to physicians and healthcare professionals serving consumers with UnitedHealthcare Medicare Supplement and Hospital Indemnity Plans that carry the AARP name. On this website you can access real-time information on: Member Eligibility. Claim Status. Claim Payment Information.• All Aetna Medicare Advantage plan members will have 12-digit member ID numbers beginning with "10." We will no longer use the "ME" prefix for Medicare Advantage ... Please use the plan number in the way that you ... ©2021 Aetna Inc. 18.03.825.1 (9/21) provider portal on Availity . Title:We would like to show you a description here but the site won't allow us.Employers, Brokers, and Providers, please provide your contact information in the form, and a representative will be in touch. Key Locations. West 621 Santa Fe Fresno, CA 93721. East 75 Fountain St. Providence, RI 02902 ... Call the phone number on the back of your member ID card.For EDI technical assistance, please contact Emdeon EDI support @ 1-866-742-4355, option 3. PROVIDER SERVICE NUMBER For provider services, please contact Aetna SSI @ 1-800-264-4000, option 2. APPLICABLE WEBSITES/E-MAIL For more about Aetna SSI, visit our website at www.aetnaseniorproducts.com or e-mail us at [email protected]. 6.

www.novitasphere.com

You must be an AARP member to enroll in an AARP Medicare Supplement Plan. Insured by UnitedHealthcare Insurance Company, 185 Asylum Street, Hartford, CT 06103 (UnitedHealthcare Insurance Company of New York, Islandia, NY for New York residents). Policy Form No. GRP 79171 GPS-1 (G-36000-4).Published on August 2, 2023. Written By: Mark Prip. Accendo is an insurance company affiliated with Aetna/CVS that offers five Medicare Supplement Insurance plans in most states. Accendo Insurance Company offers Medicare Supplement Plans A, B, F, G, and Plan N. Affiliation with the highly rated Aetna /CVS Health partnership gives Accendo ...Aetna Insurance Company is a top Medicare Supplement (Medigap) plan carrier available in most states nationwide. As one of the largest insurers in the U.S. and deemed one of the most stable Medicare Supplement providers, Aetna strives to provide a policy fit for every senior’s needs. Aetna Medicare Supplement plans are highly rated … In the “Eligibility, Claims Status & Referrals” tab, enter “Coventry” in the “Payer Name” field. For medical plans, use 25133. For MHNet, use 74289. Use the payer IDs listed in the claims column. Visit www. aetnabetterhealth. com. Select the appropriate state’s plan to learn how to get this information. Visit www. We're here to help. Not a member? Call us at 1-800-358-8749 (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. For members. Call us at 1-888-624-6290 (TTY: 711), Monday to Friday, 7 AM to 7 PM CT. Learn more about Medicare Supplement (Medigap) plans offered in Maryland.If you're moving to a new address or getting a new phone number, please let us know right away. ... For Aetna Medicare Supplement plans call at 1-800-264-4000 ${tty}. We're here ${medsupphours}. ... If you get coverage from an out‐of‐network provider, your plan won't cover their charges. Medicare and Aetna Medicare won't be ...Aetna is the brand name used for products and services provided by one or more of the Aetna group of companies, including Aetna Life Insurance Company and its affiliates (Aetna). Health benefits and health insurance plans contain exclusions and limitations. Aetna Whole Health members, learn more about how your plan works and get access to ...Medicare Supplement Plan C, Plan F and Plan G are among the most popular Medigap plans. Plan F is the most popular Medigap plan. 55% of all Medigap beneficiaries are enrolled in Plan F. 1 Plan F is also the only plan to offer coverage in all 9 of the benefit areas that can be covered by the 10 standardized Medicare Supplement Insurance plans.While most seniors in America have health insurance through Medicare, certain aspects of Medicare coverage can lead to high out-of-pocket expenses.For example, Medicare doesn't have an annual or lifetime out-of-pocket maximum, so older adults can potentially pay higher out-of-pocket expenses as the cost of health care continues to increase. 1 Talk about a dent in your wallet.

Frontier flight 2122.

Is the priceline girl pregnant.

Receive phone support for COVID-19-related trauma (PDF) if you are a frontline health care worker or an essential worker such as a grocery, pharmacy or service employee. You can also get help with basic needs such as meals, childcare, eldercare and financial matters (PDF). Call 1-833-327-AETNA ( 1-833-327-2386) (TTY: 711)Enter 10-digit TIN Contact Phone Number - no hyphens or spaces. Enter 9-digit Tax Identification Number (TIN) - no hyphens or spaces. An ECHO Draft Number can be found on any ECHO payment. It is a 9 or 10-digit number, starting with a 1, 2 or 3. It is listed as an EPC Draft Number, the Check number or a Trans Nbr on your Explanation of Payment.Whether you are a member, a provider, an employer, a broker, or a media representative, you can find the best way to contact Aetna on this page. You can also access the online chat, the FAQs, the mailing address, and the social media links. Aetna is committed to helping you achieve your health goals and answer your questions.Call Tidewater Management Group today to find out the details on this Medicare Supplement Plan at (888) 622-9122. FOR AGENT USE ONLY - Cannot be distributed to the public or used in any consumer solicitation. *Excludes Guaranteed Issue (G.I.) and underage disability business.Ask your question. Call 1-855-493-7019 (TTY: 711) anytime. If you need urgent or emergency care, call 911 and/or your doctor immediately. Staff on the nurse call line cannot diagnose, prescribe or give medical advice. Call your doctor with any questions or concerns about your health.Edgepark Medical Supplies 800-321-0591. www.edgepark.com. Diabetic testing, ostomy, urological, wound care, incontinence, insulin pump supplies, continuous glucose monitoring system Breast pumps and supplies, pleurx kits No Edwards Health Care Services 888-344-3434. www.myehcs.com.Please update your bookmarks. The page you requested has been moved to https://www.aetna.com/index.htmlChoose any doctors who accept Medicare. 3 Foreign Travel Emergency. Plans that include this benefit cover 80% of medically necessary emergency care received outside of the U.S., which began during the first 60 days of each trip, after you pay a $250 deductible per calendar year, not to exceed the lifetime maximum of $50,000.Corporate headquarters. For general inquiries, reach our corporate headquarters at 1-888-US-AETNA ( 1-800-872-3862) (TTY: 711). There is no option for members to get information at this number. The corporate headquarters phone lines are staffed: Monday through Friday, 8 AM to 6 PM ET. ….

Aetna Senior Supplemental Insurance P.O. Box 14399 Lexington, KY 40512-9700 If sending by courier: Conduent Attn: Aetna Senior Supplemental Insurance 2432 Fortune Drive Lexington, KY 40509 Final Expense Phone (Policyholders): (800) 264-4000 Email**: [email protected] (Note: We do not accept applications via email) ECHO Provider Direct - Login is the online portal that allows you to access and manage your payments from ECHO Health, Inc. You can view your transactions, reports ...Here at Plan Medigap, our goal is to help you find the Medicare Supplement Plan that works best for you and your needs. To see if Capitol Life Insurance is the right option for you, please visit our quote page or call us at (800) 750-2407. Compare Rates Now.You can submit your primary electronic claims directly to Medicare. Medicare uses member eligibility files to verify secondary insurance carriers and routes the appropriate secondary claims to us for processing and payment. Provider eligibility verification (No login required) Add us to the Payer list in your Practice Management Software.Verify the date of birth and resubmit the request. Please call the appropriate number below and select the option for precertiication: 1-888-MD-AETNA (1-888-632-3862) (TTY: 711) for calls related to indemnity and PPO-based beneits plans. 1-800-624-0756 (TTY: 711) for calls related to HMO-based beneits plans.We’re here for you. If you have any questions, you can contact our dedicated Medicare Provider Services team. They offer personalized customer service and can help you with Medicare dental plan benefits. Just call 1-800-624-0756 (TTY: 711).Aetna Dental. Call Member Services for more info about your dental benefits. 1-866-409-0937 (TTY: 711) Monday to Friday, 9 AM to 9 PM ET. Access2Care. Schedule a ride to your appointment. 1-855-814-1699 (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. Holidays may affect scheduling.In the “Eligibility, Claims Status & Referrals” tab, enter “Coventry” in the “Payer Name” field. For medical plans, use 25133. For MHNet, use 74289. Use the payer IDs listed in the claims column. Visit www. aetnabetterhealth. com. Select the appropriate state’s plan to learn how to get this information. Visit www. Aetna senior supplement provider phone number, Call us. Talk to a licensed agent at. 1-855-335-1407 (TTY: 711) Monday to Friday, 8 AM to 8 PM. Medicare FAQs. Get answers to common Medicare questions. Aetna offers a few different Medicare Advantage plans, including HMO-POS plans, PPO plans, and Dual Special Needs Plans (DSNP). Learn more about your Medicare Advantage plan options., Medigap Plan G offers the best Medigap coverage for new enrollees. Plan F has slightly better coverage, but you can only buy it if you became eligible for Medicare before Jan. 1, 2020. Aetna also is expensive for Plan F. However, it's a good choice for Plan N because of its cheap rates. Plan N from Aetna costs $109 per month, slightly less than ..., Medicare Advantage (MA/MAPD) Members with Aetna Medicare Advantage (MA) and Aetna Medicare Advantage with Prescription Drug (MAPD) plans can log in or register for an account below. This includes HMO, PPO or HMO-POS plans. Through your Aetna® member account you can manage claims, view plan details and more. Log in for …, Call the National Dentist Line at 1-800-451-7715. National Medicare Dentist Line: Have a question? Call the National Medicare Dentist Line at 1-800-624-0756. Dentist Contracting Hotline: For PPO contract information, call the Dentist Contracting Hotline at 1-800-776-0537., Just enter your mobile number and we’ll text you a link to download the Aetna Health℠ app from the App Store or on Google Play. Message and data rates may apply* MOBILE NUMBER Please be sure to add a 1 before your mobile number, ex: 19876543210, Aetna Provider Phone Number for Eligibility. Plan Name Phone Number; Aetna HMO Plan: 888-702-3862: Aetna PPO Plan: 888-802-3862: Aetna Dental, Life, & Indemnity Plan: 888-802-3862: Aetna Pharmacy: 800-238-6279: Also use our payer id lookup tool to send claim electronically to correct Aetna insurance plan., Whether you are a member, a provider, an employer, a broker, or a media representative, you can find the best way to contact Aetna on this page. You can also access the online …, Precertification occurs before inpatient admissions and select ambulatory procedures and services. Precertification applies to: You can submit a precertification by electronic data interchange (EDI), through our secure provider website or by phone, using the number on the member's ID card. Check our precertification lists., Call us at 1-800-358-8749 (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. For members. Call us at 1-888-624-6290 (TTY: 711), Monday to Friday, 7 AM to 7 PM CT. Learn more about Medicare Supplement (Medigap) plans offered in New Mexico., C-SNP. Chronic Condition Special Needs Plans. Individuals with a qualifying chronic or disabling condition who are looking for specific specialty care. Note: Aetna does not offer C-SNPs. Aetna also offers Medicaid-Medicare Plans (MMPs) in OH, IL and MI. Learn more here., Aetna Senior Supplemental Insurance Automated underwriting and decisions CGFMP06547 ©2022 Aetna Inc. Aetna Senior Supplemental Insurance 081622 Frequently asked questions Have your underwriting guidelines changed? No, our underwriting guidelines have not changed. Do all applications submitted via Aetna Quote & Enroll receive an automated, New Tool Simplifies Verification of Insurance Eligibility and Medicare Supplements Benefits, ProviderPayments.com is the online portal that lets you access and manage your provider payments from ECHO Health, Inc. You can view your transactions, reports, and ..., Medicare Supplements. If you are a provider or current customer, call 855-323-8914. Puritan no longer sells new Medicare supplement plans. If you have a current Medicare supplement plan with Puritan Life, you can log in here., Advantage Plans have provider and pharmacy networks. Not all doctors, pharmacies or other providers are in every network. ... American Continental Insurance phone number: Phone: 1 (800) 264-4000. ... The variety of available Aetna Medicare supplement plans means you can find a plan that meets your coverage needs and budget. Aetna is one of the ..., Call us. Talk to a licensed agent at 1-800-358-8749. (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. Medicare provides you with coverage for health-related expenses, but it doesn't cover everything. There are a number of gaps in Medicare coverage. Learn how a Medicare Supplement Insurance plan can help you fill them., Need technical assistance with website secure portal sign up? Email Us or call a website technician at 1-800-587-5139, Monday through Friday, 8 AM to 5 PM CT. *Includes all products underwritten by American Continental Insurance Company (ACI) and Continental Life Insurance Company of Brentwood, Tennessee (CLI), both Aetna Companies; Medicare ..., Finding the right doctor matters. We’ve done the work for you. Aetna Smart Compare® is a designation we give to doctors in our network. These doctors have proven time and time again that they provide high-quality, effective care. You’ll find these doctors with the label “Quality Care,” “Effective Care” or both in your search., Here's how it works: Step 1. First, you can request participation in the Aetna network by completing our online request for participation form. Step 2. Next, we’ll evaluate the current need to service our membership in your area. We don’t want you to wait, so we’ll make sure to let you know within 45 days whether you’re eligible for ... , Medicare Supplement Claims: P.O. Box 14770, Lexington, KY 40512-4770 Sales Team-- For information about our other Aetna Senior Supplemental insurance products that you do not currently have a policy, call 800 465.1023. Website Technical Assistance Team-- For assistance with any website technical issues, please contact us as indicated below., 100% allowable COB: $370 bill results in $0 primary carrier payment and $25.04 patient responsibility per primary carrier. We pay $25.04. MOB provision: $370 bill results in $65.70 Aetna normal benefit. Subtracting the primary carrier payment ($0), we pay $65.70. Before sending us a check, please consider that your payment may have resulted ..., Aetna members, you can Log in or Register for the Aetna Navigator secure member website to manage your benefits--view claims, find a doctor, check eligibility information, …, In today’s digital world, having a virtual phone number is becoming increasingly important for businesses. A virtual phone number is a phone number that is not linked to any physic..., Cardiac rehabilitation services. Pulmonary rehabilitation services. Complex diagnostic test and radiology. Radiation therapy. Vision care (Medicare-covered) *Please note this is not a full list. For specific benefit questions, call 800-624-2414 (TTY: 711 ), 8 a.m. to 8 p.m., seven days a week. You can enhance your Senior Care program with the ..., So if someone calls you to sell you an insurance policy or change your current policy — even if the person says they represent Aetna — call us first at the number on your ID card or 1-800-872-3862 ${tty}. Even if the person gives you a different number, do not call it. If you suspect price gouging or a scam, contact your state attorney general., Discover Aetna provider phone numbers. Simplify interactions and access support promptly with accurate and up-to-date contact information., Insurance agents and brokers, log in to Producer World to get quotes, find compensation information, check license status, setup direct deposit and more., While most seniors in America have health insurance through Medicare, certain aspects of Medicare coverage can lead to high out-of-pocket expenses.For example, Medicare doesn't have an annual or lifetime out-of-pocket maximum, so older adults can potentially pay higher out-of-pocket expenses as the cost of health care continues to increase. 1 Talk about a dent in your wallet., Update provider data . Update your provider data such as service location, phone number, telehealth services, email and more., Call us. Talk to a licensed agent at. 1-855-335-1407 (TTY: 711) Monday to Friday, 8 AM to 8 PM. Medicare FAQs. Get answers to common Medicare questions. Aetna offers a few different Medicare Advantage plans in Texas, including HMO plans, PPO plans, and Dual Special Needs Plans (DSNP). Learn more about your Medicare Advantage plan options in Texas., Click on "Start a new case". 4 Enter applicant's first name, last name and gender. 5 Select applicant's resident state and choose the Product Type as "Medicare Supplement". 6 Click "Select" to begin application process for the applicant. 9. 7 Enter Applicant demographic information - DOB, Address, SSN., Secure Provider Portal, Call us. Talk to a licensed agent at 1-800-358-8749. (TTY: 711) Monday to Friday, 8 AM to 8 PM ET. Medicare provides you with coverage for health-related expenses, but it doesn’t cover everything. There are a number of gaps in Medicare coverage. Learn how a Medicare Supplement Insurance plan can help you fill them.