Understanding your prescription drug coverage options can feel overwhelming, especially when you’re navigating the Medicare system. Medicare Part D provides essential prescription drug coverage that helps millions of Americans afford their medications. At PromiseCare Medical Group, our physicians work closely with Medicare patients throughout Riverside County, California to ensure they understand their prescription drug benefits and make informed decisions about their healthcare coverage.
What Is Medicare Part D?
Medicare Part D is optional prescription drug coverage offered by Medicare-approved private insurance companies. Unlike Original Medicare (Parts A and B), which covers hospital stays and doctor visits, Part D specifically addresses your prescription medication needs through comprehensive pharmaceutical care.
Part D coverage is available in two ways: as a standalone prescription drug plan that works alongside Original Medicare, or as part of a Medicare Advantage Plan that includes prescription drug coverage. At PromiseCare Medical Group, an Independent Physician Association network, we accept Medicare Advantage plans from major insurers including Aetna, Alignment Healthcare, Anthem, Brand New Day, Cigna, Health Net, Humana, SCAN Health Plan, and United Healthcare.
The Centers for Medicare & Medicaid Services (CMS) regulates Part D through the provisions established by the Medicare Modernization Act, ensuring that beneficiaries have access to affordable prescription drugs while maintaining quality standards for coverage.
Who Needs Medicare Part D?
While Part D enrollment is optional, it’s highly recommended for anyone who regularly takes prescription medications. Even if you’re currently healthy and don’t take daily medications, enrolling in Part D when you first become eligible helps you avoid late enrollment penalties that could increase your out-of-pocket expense permanently.
Our physicians at PromiseCare Medical Group see firsthand how prescription drug costs can impact patients’ health outcomes. Without Part D coverage, medication expenses can quickly become unmanageable, particularly for patients managing chronic conditions, leading some to skip doses or avoid filling prescriptions altogether.
Understanding Part D Costs for 2026
Medicare Part D costs involve several components influenced by the Inflation Reduction Act of 2022 that work together to determine your out-of-pocket expenses:
Monthly Premium: You’ll pay a monthly premium to your Part D plan, which varies by plan and provider. The average standalone Part D plan premium administered through private insurers is projected to be approximately $34.50 in 2026, down from $38.31 in 2025.
Annual Deductible: Some plans require you to pay a deductible before coverage begins. For 2026, the maximum deductible is $615, though some plans offered through health maintenance organizations and other structures have no deductible.
Copayments and Coinsurance: After meeting your deductible, you’ll pay either a fixed copayment or a percentage (coinsurance) of your drug costs. The specific amounts depend on your plan’s drug formulary structure and the tier assignment of your medications.
Out-of-Pocket Maximum: Starting in 2025, Medicare introduced an annual out-of-pocket cap under provisions from the Inflation Reduction Act of 2022. For 2026, this cap is set at $2,100. Once you reach this amount, your plan pays 100% of your covered drug costs for the rest of the year—a significant improvement from previous coverage gap provisions.
How Part D Drug Formularies Work
Every Part D plan maintains a drug formulary—a list of covered medications organized into tiers. The formulary system, regulated by the United States Pharmacopeia standards and CMS guidelines, directly affects what you pay for your prescriptions.
Tier 1 – Preferred Generic Drugs: These are the most affordable options, typically including commonly prescribed generic drugs. Patients usually pay the lowest copayments for Tier 1 medications, making them the most cost-effective choice when clinically appropriate.
Tier 2 – Generic Drugs: This tier includes higher-cost generic medications that are still more affordable than brand name drugs. Generic drugs contain the same active pharmaceutical ingredients as their brand-name counterparts.
Tier 3 – Preferred Brand Drugs: Brand name drugs without generic alternatives fall into this category. These medications are protected by pharmaceutical patents and typically have higher copayments than generic options.
Tier 4 – Non-Preferred Drugs: This tier includes both generic and brand-name drugs that may have lower-cost alternatives available on lower tiers. Plans may require prior authorization for some medications in this tier.
Tier 5 – Specialty Drugs: The highest tier covers unique, high-cost medications often used for complex chronic conditions. These typically include biosimilar medications and specialized treatments that require careful pharmaceutical care management.
The physicians at PromiseCare Medical Group work closely with patients to review their formularies and, when clinically appropriate, prescribe medications that provide effective treatment while minimizing out-of-pocket costs through strategic use of generic and biosimilar options.
The Part D Coverage Phases Explained
Throughout the year, your Part D coverage progresses through different phases mandated by the Medicare Modernization Act, each with its own cost-sharing structure:
Deductible Phase: If your plan has a deductible, you pay the full cost of your medications until you meet this amount. Not all plans require meeting the deductible before any coverage begins—some cover certain preventive medications and generic drugs even before the deductible is met.
Initial Coverage Phase: After meeting your deductible, you pay copayments or coinsurance for your medications. Your plan shares the cost with you during this phase, with the exact amounts determined by your plan’s formulary tier structure.
Catastrophic Coverage Phase: Once you reach the $2,100 out-of-pocket maximum in 2026, your plan covers 100% of your prescription costs for covered medications for the remainder of the plan year. This protection, strengthened by the Inflation Reduction Act of 2022, provides essential financial security for beneficiaries with high medication costs.
Special Provisions for Insulin and Chronic Disease Management
Thanks to recent Medicare improvements under the Patient Protection and Affordable Care Act and subsequent legislation, beneficiaries pay no more than $35 per month for covered insulin products, regardless of which tier the insulin is in. This cap applies even before you’ve met your deductible, providing significant savings for diabetes mellitus management.
Our physicians at PromiseCare Medical Group regularly counsel patients with diabetes mellitus and other chronic conditions about their prescription coverage and help them navigate the Medicare system to ensure they can afford their essential medications. We also coordinate care for patients managing cardiovascular disease, respiratory conditions, and other long-term health issues that require ongoing pharmaceutical care.
When to Enroll in Part D
Timing your Part D enrollment correctly helps you avoid coverage gaps and late enrollment penalties administered by CMS.
Initial Enrollment Period: Your first opportunity to enroll is during your Medicare Initial Enrollment Period, which spans seven months—three months before your 65th birthday, your birthday month, and three months after. This period aligns with your enrollment in Medicare Part A (hospital insurance) and Medicare Part B (medical insurance).
Annual Election Period: Each year from October 15 to December 7, you can enroll in, switch, or drop your Part D coverage. Changes take effect January 1 of the following year. PromiseCare Medical Group hosts Medicare information events throughout Riverside County during this period to help patients understand their options at convenient pharmacy and community locations.
Special Enrollment Periods: Certain life events may qualify you for a Special Enrollment Period, allowing you to make coverage changes outside the standard periods. These events include moving to a new service area, losing other prescription coverage, or qualifying for Extra Help assistance.
Avoiding the Part D Late Enrollment Penalty
If you go 63 days or more without creditable prescription drug coverage after your Initial Enrollment Period ends, you’ll face a late enrollment penalty. This penalty is calculated as 1% of the national base beneficiary premium ($38.99 in 2026) multiplied by the number of uncovered months, and it’s added to your Part D premium permanently for as long as you maintain Medicare prescription drug coverage.
To avoid this penalty, enroll in Part D when you first become eligible, or maintain creditable prescription drug coverage from another source. Creditable coverage includes prescription benefits from employer-based plans, TRICARE through military service, or the United States Department of Veterans Affairs health system.
How PromiseCare Medical Group Supports Your Part D Coverage
At PromiseCare Medical Group, our network of over 60 primary care physicians and 400+ specialists throughout Riverside County works collaboratively to optimize your prescription drug management within your Part D coverage structure.
Medication Reviews During Preventive Care: During your annual wellness visits and routine health maintenance organization appointments, our physicians review all your medications to ensure they’re still necessary, effective, and covered by your plan’s drug formulary.
Formulary-Friendly Prescribing: When clinically appropriate, we prescribe generic drugs and biosimilar medications that are covered by your specific plan’s formulary to minimize your copayment and coinsurance obligations while maintaining therapeutic effectiveness.
Prior Authorization Support: If you need a medication that requires prior authorization from your plan’s pharmacy benefit manager, our staff works with your insurance company to provide the necessary medical documentation and clinical justification.
Coordinated Pharmaceutical Care: Our comprehensive approach means your primary care physician communicates with specialists to ensure all your prescriptions are coordinated and optimized for both health outcomes and cost-effectiveness. This integrated care model is particularly beneficial for patients managing multiple chronic conditions.
Extra Help Programs and Financial Assistance
Low-income Medicare beneficiaries may qualify for Extra Help (also called the Low Income Subsidy), which provides assistance with Part D premiums, deductibles, copayments, and coinsurance. If your income is below 150% of the Federal poverty level and you have limited resources, this program can dramatically reduce your prescription drug costs.
The State Health Insurance Assistance Program (SHIP) in California provides free counseling to help you determine eligibility and navigate the application process. PromiseCare Medical Group’s patient care coordinators can also assist with initial screening and connecting you with appropriate resources for financial assistance.
Choosing the Right Part D Plan
When selecting a Part D plan from Medicare-approved insurance providers, consider these factors:
Coverage of Your Medications: Check the plan’s drug formulary to ensure it covers all your current prescriptions. Enter your medications into Medicare’s Plan Finder tool at Medicare.gov to compare costs across different plans offered in Riverside County.
Pharmacy Network: Verify that your preferred pharmacy participates in the plan’s network. PromiseCare Medical Group works with pharmacy partners throughout Riverside County to ensure patients have convenient access to their medications at participating pharmacies.
Total Annual Costs: Look beyond the monthly premium. Calculate your total expected costs including premiums, deductibles, copayments, and coinsurance for your specific medications. Consider both brand name drugs and generic alternatives in your calculations.
Mail-Order Options: Some plans offer mail-order pharmacy services through specialty pharmacy benefit managers that can provide cost savings for maintenance medications used to manage chronic conditions.
Biosimilar Availability: For patients taking expensive biological medications, check whether the plan covers biosimilar alternatives that may offer significant cost savings while maintaining therapeutic equivalence.
Making Changes to Your Coverage
Once enrolled in a Part D plan, you can generally only make changes during specific enrollment periods. However, Medicare beneficiaries with Medicaid dual eligibility or Extra Help can change plans once per calendar month, with coverage effective the first day of the following month.
If you experience a qualifying life event—such as moving outside your plan’s service area, losing employer coverage, or entering a nursing facility—you may be eligible for a Special Enrollment Period that allows you to modify your prescription drug coverage outside the standard timeframes.
Working With Your Healthcare Team at PromiseCare
At PromiseCare Medical Group, we believe that effective prescription drug management requires ongoing collaboration between patients, physicians, and community pharmacists. Our care coordination approach through our Independent Physician Association network ensures that:
- All your healthcare providers are aware of your complete medication list to prevent dangerous drug interactions
- Generic drug and biosimilar alternatives are considered when clinically appropriate and covered by your formulary
- Your treatment plan aligns with your Part D coverage structure and out-of-pocket budget
- Prior authorization requirements are handled efficiently to minimize delays in care
Our physicians also participate in medication therapy management programs for patients taking multiple medications or managing complex chronic conditions, providing comprehensive pharmaceutical care that optimizes both health outcomes and medication costs.
Part D and PromiseCare’s Specialized Health Programs
If you participate in PromiseCare Medical Group’s specialized programs, your prescription drug needs may require additional coordination with your Part D coverage:
Diabetes/Pre-Diabetes Self Management Program: Our diabetes educators work with your physician to optimize your medication regimen for diabetes mellitus management, including insulin therapy when indicated, while managing costs through your Part D coverage and taking advantage of the $35 insulin cap.
Heart Health Program: Cardiovascular disease medications are essential for managing heart conditions. Our cardiologists and primary care physicians ensure your heart medications—including blood pressure medications, cholesterol-lowering statins, and antiplatelet drugs—are covered through your drug formulary and affordable through optimal tier placement.
Weight to Go Program: If your weight management plan includes prescription medications, we help navigate Part D coverage requirements. Recent policy changes have expanded coverage for certain weight management medications when used to treat related chronic conditions like diabetes mellitus or cardiovascular disease.
Nutrition for Life Program: Our nutritionists work with your medical team to identify how dietary changes can potentially reduce medication needs or enhance medication effectiveness, helping you maximize the value of your Part D coverage while improving overall health outcomes.
Resources and Support at PromiseCare Medical Group
PromiseCare Medical Group provides comprehensive support for Medicare patients navigating Part D coverage throughout our Riverside County service area:
- Medicare Information Events: We host regular Q&A sessions at convenient locations throughout Riverside County, including Hemet, Menifee, and other communities we serve. Our physicians and enrollment specialists provide personalized guidance during the Annual Election Period.
- Patient Education Resources: Our website offers health education materials and articles about Medicare coverage, pharmaceutical care, and medication management strategies.
- Care Coordination Services: Our case management team assists with insurance questions, helps coordinate coverage for complex medication needs, and provides support for prior authorization and formulary exception requests.
- Provider Network Access: With over 60 primary care physicians, 400+ specialists, and 18 urgent care centers across Riverside County, our extensive health maintenance organization network ensures you can access care conveniently while maintaining your Part D pharmacy benefits.
Getting Help With Part D Questions
If you have questions about Medicare Part D or need help understanding your prescription drug coverage, several resources are available:
PromiseCare Medical Group: Call us at (951) 390-2840 to speak with our patient services team. We can help you understand how your coverage works, coordinate with your healthcare providers, and navigate prior authorization requirements through your plan’s pharmacy benefit manager. Our main office is located at 1565 W. Florida Ave., Hemet, CA 92543.
Medicare: Contact 1-800-MEDICARE (1-800-633-4227) for direct assistance from Medicare representatives employed by the Centers for Medicare & Medicaid Services. TTY users can call 1-877-486-2048. Representatives can answer questions about enrollment, coverage, and plan options.
State Health Insurance Assistance Program (SHIP): California’s SHIP provides free, unbiased counseling to Medicare beneficiaries about their coverage options, including Part D enrollment and Extra Help applications.
Looking Ahead: Recent Changes to Part D
Medicare Part D continues to evolve through legislative actions, with recent improvements from the Inflation Reduction Act of 2022 providing significant benefits:
- Out-of-Pocket Cap: The $2,100 out-of-pocket maximum introduced in 2025, eliminating the previous coverage gap (commonly called the “donut hole”)
- Insulin Cost Cap: The $35 monthly maximum for insulin products regardless of formulary tier
- Vaccine Coverage: Expanded coverage for vaccines recommended by the Advisory Committee on Immunization Practices at no cost
- Medicare Prescription Payment Plan: A new option allowing eligible beneficiaries to spread out-of-pocket costs throughout the year rather than paying large amounts upfront
- Drug Price Negotiation: CMS now negotiates prices for certain high-cost medications, with the first negotiated prices taking effect in 2026
At PromiseCare Medical Group, our physicians and care coordinators stay current with these policy changes implemented by the Centers for Medicare & Medicaid Services to ensure our patients receive the maximum benefits available through their Part D coverage.
Understanding Your Pharmacy Options
Part D plans contract with pharmacy networks to provide prescription medications at negotiated prices. Understanding your pharmacy options helps maximize your benefits:
Preferred Pharmacies: Many plans designate certain pharmacies as “preferred” where you’ll pay lower copayments and coinsurance than at standard network pharmacies. Our care team can help you identify preferred pharmacies convenient to your Riverside County location.
Mail-Order Pharmacies: For maintenance medications used to manage chronic conditions, mail-order service through your plan’s contracted pharmacy benefit manager may offer cost savings and the convenience of home delivery, typically providing 90-day supplies.
Specialty Pharmacies: Medications for complex chronic conditions, including many biosimilar drugs and specialty tier medications, may require use of specialty pharmacies that provide additional patient support and monitoring services.
Prior Authorization and Utilization Management
Some Part D plans use utilization management tools to ensure appropriate medication use and control costs:
Prior Authorization: Your physician may need to submit clinical documentation to your plan’s pharmacy benefit manager explaining why a particular medication is medically necessary before the plan approves coverage. PromiseCare physicians proactively handle these requirements.
Step Therapy: Some plans require you to try a lower-cost medication first before approving coverage for more expensive alternatives. This protocol ensures that generic drugs and biosimilar options are considered when clinically appropriate.
Quantity Limits: Plans may limit the amount of certain medications you can receive in a specific time period to prevent misuse and ensure appropriate dosing based on clinical guidelines.
Appeals and Exceptions Process
If your Part D plan denies coverage for a medication or places it in a higher formulary tier than you believe appropriate, you have the right to request an exception or file an appeal:
Formulary Exceptions: If you need a medication not listed on your plan’s drug formulary, your physician can request an exception by providing clinical justification for why covered alternatives aren’t suitable for your condition.
Tiering Exceptions: If your physician believes a higher-tier medication is medically necessary instead of a lower-tier alternative, they can request that your plan apply lower copayment amounts.
Coverage Determinations: If your prescription is denied at the pharmacy, you can request a formal coverage determination from your plan, initiating the appeals process if necessary.
PromiseCare Medical Group’s care coordination team assists patients throughout the exceptions and appeals process, working directly with pharmacy benefit managers and plan administrators to secure necessary medication coverage.
Making Medicare Part D Work For You
Understanding Medicare Part D doesn’t have to be complicated. With the right information and support from your healthcare team at PromiseCare Medical Group, you can navigate your prescription drug coverage confidently and ensure you can afford the medications you need to manage chronic conditions and maintain your health.
Our Independent Physician Association model focuses on coordinated, patient-centered pharmaceutical care that considers both clinical effectiveness and financial affordability. Whether you’re managing diabetes mellitus, cardiovascular disease, respiratory conditions, or other health issues, our physicians work within the Medicare Part D framework to optimize your medication regimen.
Remember, the best Part D plan is one that covers your medications through an appropriate drug formulary, fits your budget through reasonable copayment and coinsurance structures, and provides access to convenient pharmacy locations in Riverside County. By working together with your PromiseCare physician and reviewing your coverage annually during the Annual Election Period, you can ensure your prescription drug needs are met while managing your healthcare costs effectively.
Frequently Asked Questions About Medicare Part D
What’s the difference between Medicare Part D and Medicare Part B prescription coverage?
Medicare Part B covers certain medications administered in clinical settings, including infusions and injections given by healthcare providers. Medicare Part D covers outpatient prescription drugs you pick up from a pharmacy. The Centers for Medicare & Medicaid Services maintains clear distinctions between these coverage types to prevent gaps in pharmaceutical care.
Can I have both a Medicare Advantage Plan and a standalone Part D plan?
No. If you enroll in a Medicare Advantage Plan through a health maintenance organization or other structure, you must receive your prescription drug coverage through that same plan if it offers Part D benefits. You cannot add a separate standalone Part D plan to a Medicare Advantage Plan.
What medications are not covered by Part D?
Part D excludes certain categories including medications for weight loss (unless used to treat other conditions), over-the-counter drugs, medications covered under Medicare Part B, and drugs used for cosmetic purposes. However, recent policy discussions by the Centers for Medicare & Medicaid Services may expand coverage for some weight-management medications.
How do I know if my current prescriptions are covered?
Check your plan’s drug formulary, which lists all covered medications organized by tier. You can access your formulary through your plan’s website, by calling the number on your insurance card, or by using Medicare’s online Plan Finder tool. PromiseCare Medical Group’s care coordinators can also help you verify coverage.
What should I do if my plan stops covering one of my medications?
Contact your plan to understand why the medication was removed from the formulary. You may be able to request a formulary exception with support from your PromiseCare physician, who can provide clinical justification for why you need that specific medication.
Can I use any pharmacy with my Part D plan?
You must use pharmacies in your plan’s network to receive Part D coverage. Using an out-of-network pharmacy means you’ll pay the full cost of your prescriptions, and those costs won’t count toward your out-of-pocket maximum.
What is the “Extra Help” program, and do I qualify?
Extra Help (Low Income Subsidy) provides financial assistance with Part D costs for beneficiaries with income below 150% of the Federal poverty level and limited resources. Contact your local State Health Insurance Assistance Program or call 1-800-MEDICARE to determine eligibility.
How does Part D coverage work if I have both Medicare and Medicaid?
If you’re “dual eligible” with both Medicare and Medicaid, you automatically receive Extra Help with your Part D costs. You also have special enrollment rights allowing you to change Part D plans monthly if needed.
What happens to my Part D coverage if I move to a different state?
Moving to a new location outside your plan’s service area qualifies you for a Special Enrollment Period. You’ll need to enroll in a plan that serves your new address, as Part D plans are organized by geographic regions.
Does Part D cover vaccines?
Yes, Part D covers most vaccines, and under current regulations, vaccines recommended by the Advisory Committee on Immunization Practices are covered at no cost to you, with no copayment or coinsurance required.
About PromiseCare Medical Group
PromiseCare Medical Group is the largest Independent Physician Association network in the Inland Empire, serving Riverside County, California with over 60 primary care physicians, 400+ specialists, and 18 urgent care centers. We accept Medicare Advantage plans from major insurers and provide comprehensive, patient-centered care focused on preventive medicine and chronic condition management through our health maintenance organization network partnerships.
Our approach to pharmaceutical care integrates clinical excellence with practical affordability, helping patients navigate their Medicare Part D coverage while receiving high-quality medical treatment for diabetes mellitus, cardiovascular disease, and other chronic conditions requiring ongoing medication management.
Contact Information:
- Address: 1565 W. Florida Ave., Hemet, CA 92543
- Phone: (951) 390-2840
- TTY: 711
- Website: https://promisecare.com
For enrollment information, questions about Medicare Part D coverage, or to schedule an appointment with one of our Medicare-experienced physicians, contact us today. Our care coordination team is here to help you understand your prescription drug benefits and ensure you receive the pharmaceutical care you need.
Medical Disclaimer: This information is for educational purposes only and should not replace professional medical advice. Medicare policies and Part D coverage details may change. Always consult with your healthcare provider and your specific Part D plan for personalized guidance about your prescription drug coverage. The information about Part D costs, formularies, and enrollment periods is current as of January 2026 and is subject to change by the Centers for Medicare & Medicaid Services.