What is the Humana Medicare customer service phone number?

Humana's main Medicare member services line is 1-800-457-4708 (TTY 711), available 8am – 8pm seven days a week during AEP (October 15 – February 14), and Monday through Friday outside that window.

What is the UnitedHealthcare AARP Medicare customer service phone number?

UnitedHealthcare's AARP Medicare member services line is 1-800-721-0627 (TTY 711). The number printed on the back of your member ID card is the most reliable — it routes you to your specific plan.

What is the Aetna Medicare customer service phone number?

Aetna Medicare member services is 1-800-282-5366 (TTY 711). For SilverScript Part D, call 1-866-235-5660. The number on the back of your Aetna member ID card always routes correctly.

What number do I call to report Medicare fraud?

Report Medicare fraud to the Senior Medicare Patrol (SMP) at 1-877-808-2468, the HHS Office of Inspector General at 1-800-HHS-TIPS (1-800-447-8477), or Medicare directly at 1-800-MEDICARE (1-800-633-4227). Document the suspected fraud (dates, billed amount, services claimed) before calling.

How do I call Medicare directly?

1-800-MEDICARE (1-800-633-4227), available 24 hours a day, 7 days a week, in all 50 states. TTY users call 1-877-486-2048. For enrollment help and plan questions, the SHIP (State Health Insurance Assistance Program) in your state offers free local counseling.

All major Medicare carriers · Verified for 2026

Medicare carrier customer service phone numbers.

Every major Medicare carrier's direct phone number for member services, prescription claims, prior authorization, fraud reporting, and provider lookup. Always check the back of your member ID card first — it routes directly to your specific plan. The numbers below are the public main lines.

Pro tip. The number printed on the back of your member ID card always works best — it routes you to your plan, not the carrier's national queue. Use the numbers below only when you don't have your card handy or you're a prospective member.

Humana

~6.4M MA members · 4.0+ stars · Louisville, KY HQ

Member services (MA)1-800-457-4708

Part D (standalone)1-800-281-6918

Pharmacy (mail-order)1-800-379-0092

Prior authorization1-800-523-0023

Fraud reporting1-800-614-4126

UnitedHealthcare AARP

~9.6M MA members · 4.0+ stars · Minnetonka, MN HQ

Member services (MA-PD)1-800-721-0627

Medigap (AARP)1-800-272-8601

Part D standalone1-866-416-9081

Optum Rx pharmacy1-800-788-7871

24/7 nurse line1-877-365-7949

Aetna (CVS Health)

~3.4M MA members · 3.5-4 stars · Hartford, CT HQ

Member services (MA-PD)1-800-282-5366

SilverScript Part D1-866-235-5660

Medigap1-800-264-7576

Prior authorization1-800-414-2386

Provider lookup1-800-456-6248

Cigna Healthcare

~0.7M MA members · 3.5-4 stars · Bloomfield, CT HQ

Member services (MA)1-800-668-3813

Part D standalone1-800-735-1459

Express Scripts pharmacy1-800-711-5672

Provider lookup1-800-244-6224

WellCare (Centene)

~1.5M MA members · 3.5 stars · Tampa, FL HQ

Member services (MA-PD)1-888-347-3100

Part D standalone1-888-878-0727

Pharmacy1-800-727-3337

Prior authorization1-855-628-8811

Devoted Health

~250K MA members · 4.5+ stars · Waltham, MA HQ

Member services1-800-338-6833

24/7 nurse line1-866-770-7000

Pharmacy benefits1-888-338-1444

Prior authorization1-800-338-6833

Anthem Blue Cross Blue Shield

Multi-state · Indianapolis, IN HQ

MA member services1-833-600-5934

Part D standalone1-833-585-6467

24/7 nurse line1-800-635-7266

Prior authorization1-833-585-6467

Florida Blue (BCBS Florida)

Florida only · Jacksonville, FL HQ

Medicare member services1-800-926-6565

Part D1-800-926-6565

Medigap1-800-352-2583

Kaiser Permanente

CA, CO, GA, HI, MD, OR, VA, WA, DC · Oakland, CA HQ

Medicare member services1-800-443-0815

Pharmacy1-888-218-6245

24/7 advice nurse1-800-205-7651

BCBS of Alabama

Alabama only · ~70% AL market share

Medicare member services1-888-802-4802

Medigap1-888-988-7966

Medicare (CMS) directly

Federal Medicare program · 24/7

Main line1-800-MEDICARE (633-4227)

TTY1-877-486-2048

Fraud / scam reporting1-800-447-8477 (HHS OIG)

Senior Medicare Patrol1-877-808-2468

Social Security (SSA)

Medicare enrollment + IRMAA appeals

Main line1-800-772-1213

TTY1-800-325-0778

SSA-44 IRMAA appeal1-800-772-1213 (Mon-Fri)

SilverEdge Insurance Advisors

Licensed in all 50 states · 4.9/5 from 1,847 members

Free plan comparison(866) 534-1886

Mon-Fri9am – 7pm ET

Saturday10am – 2pm ET

When to call which carrier

Coverage question or claim dispute → your carrier's member services (top number on each card above)
Prior authorization for a new med or procedure → your carrier's prior auth line
Prescription not covered, or denied at pharmacy → your carrier's pharmacy benefits line
Suspected fraud or scam → Senior Medicare Patrol (1-877-808-2468) or HHS OIG (1-800-447-8477) — not your carrier
Enrollment, IRMAA, Medicare premium questions → Social Security (1-800-772-1213) or Medicare directly (1-800-MEDICARE)
Comparing plans or switching carriers → SilverEdge (free, no obligation)