Yes, Medicare Part B covers a wide range of outpatient services, including doctor visits, lab tests, imaging, emergency care, mental health treatment, preventive screenings, and durable medical equipment. It’s the part of Original Medicare specifically designed for care you receive outside of an inpatient hospital stay. After meeting a $257 annual deductible, you typically pay 20% of the Medicare-approved amount for most covered services.
What Part B Covers in Outpatient Settings
Part B picks up the tab for most medical services that don’t require formal hospital admission. The core categories include doctor office visits, outpatient surgery (including same-day procedures), diagnostic lab tests billed by a hospital, X-rays and other radiology services, and emergency or observation services. If you need outpatient care at a hospital clinic, an ambulatory surgery center, or your physician’s office, Part B is generally the payer.
Part B also covers outpatient mental health services. That includes individual and group psychotherapy, family counseling when it supports your treatment plan, and intensive outpatient programs. You can see psychiatrists, clinical psychologists, clinical social workers, nurse practitioners, physician assistants, marriage and family therapists, and licensed mental health counselors. After you meet the deductible, the standard cost-sharing is 20% of the Medicare-approved amount, though hospital outpatient clinics may charge an additional copayment on top of that.
Preventive Services at No Cost
One of the most valuable parts of Part B is its preventive care benefit. You pay nothing for most preventive services as long as your provider accepts Medicare assignment. There’s no deductible and no coinsurance for these visits. The list is extensive:
- Cancer screenings: mammograms, colonoscopies, lung cancer screenings, cervical and vaginal cancer screenings, prostate cancer screenings, and colorectal screening options like fecal occult blood tests and stool DNA tests
- Cardiovascular care: cardiovascular disease screenings and behavioral therapy
- Diabetes: diabetes screenings, self-management training, and the Medicare Diabetes Prevention Program
- Vaccines: flu shots, COVID-19 vaccines, pneumococcal shots, and hepatitis B shots
- Behavioral health screenings: depression screenings, alcohol misuse screenings and counseling, tobacco cessation counseling, obesity behavioral therapy
- Other screenings: HIV screenings, hepatitis B and C screenings, sexually transmitted infection screenings and counseling, glaucoma screenings, bone mass measurements, and abdominal aortic aneurysm screenings
- Wellness visits: a one-time “Welcome to Medicare” preventive visit and a yearly wellness visit
These preventive benefits can catch problems early and cost you nothing out of pocket, making them well worth scheduling.
Durable Medical Equipment
Part B covers medically necessary durable medical equipment (DME) prescribed by your doctor for use in your home. To qualify, the equipment must withstand repeated use, serve a medical purpose, be the type of item only useful to someone who is sick or injured, and be expected to last at least three years.
Covered items include wheelchairs, walkers, canes, crutches, hospital beds, oxygen equipment, CPAP machines for sleep apnea, nebulizers, suction pumps, patient lifts, and infusion pumps. Diabetes supplies are also covered: blood sugar monitors, test strips, lancets, and control solutions. After your deductible, you pay 20% of the Medicare-approved amount for DME.
Emergency Room Visits
Part B covers emergency department services with a specific cost structure. You pay a copayment for the emergency department visit itself, plus a copayment for each hospital service you receive during that visit. You also owe 20% of the Medicare-approved amount for your doctor’s services after the deductible. One helpful rule: if the ER doctor admits you to the same hospital as an inpatient within three days for a related condition, those emergency department copayments get waived because the visit rolls into your inpatient stay.
The Observation Status Trap
This is one of the most misunderstood parts of Medicare, and it can hit your wallet hard. If you’re in a hospital bed overnight, you might assume you’ve been admitted as an inpatient. But if your doctor hasn’t written a formal inpatient admission order, you’re technically an outpatient receiving “observation services,” and your care is billed under Part B, not Part A.
This distinction matters for two reasons. First, your cost-sharing is different. As an outpatient, you pay copayments for each hospital service rather than the flat inpatient deductible, and your total outpatient copayments can actually exceed what you’d pay as an inpatient. Second, observation stays don’t count toward the three-day inpatient requirement for Medicare to cover a subsequent skilled nursing facility stay. So if you spend two nights in the hospital under observation and then need rehab in a nursing facility, Medicare won’t cover it.
Hospitals are required to give you a Medicare Outpatient Observation Notice (MOON) explaining your status, why you’re classified as an outpatient, and how it could affect your costs both during and after your hospital stay. If you receive one, read it carefully.
What Your Costs Look Like
The standard Part B monthly premium is $202.90 in 2026. Most enrollees pay this amount, though higher earners pay more based on income. Beyond the premium, you face a $257 annual deductible. Once you’ve met it, the standard cost-sharing for most Part B services is 20% of the Medicare-approved amount with no upper limit on out-of-pocket spending in Original Medicare (which is one reason many people add a Medigap supplemental policy).
For outpatient hospital services specifically, the copayment for any single service can’t exceed the inpatient hospital deductible. But there’s a catch: your combined copayments across multiple outpatient services in a single visit have no such cap, so a complex outpatient encounter with several procedures could add up quickly.
What Part B Does Not Cover
Several common outpatient services fall outside Part B coverage entirely. Routine dental care, including cleanings, fillings, tooth extractions, and dentures, is not covered. Eye exams for prescription glasses and hearing exams for fitting hearing aids are excluded, along with the hearing aids themselves. There are narrow exceptions for dental work: Medicare may cover dental services directly tied to a heart valve replacement, organ transplant, cancer treatment, or dialysis for end-stage renal disease. But for everyday dental, vision, and hearing needs, you’d need a Medicare Advantage plan that includes those benefits or separate standalone coverage.