Pneumonia is a lung infection that can become serious quickly, especially for older adults. It can affect one or both lungs and may make it harder for oxygen to move into the blood.
Medicare may help with pneumonia prevention, diagnosis, treatment, recovery support, and medications. Coverage depends on the service, the setting, medical necessity, and whether you have Original Medicare or a Medicare Advantage plan.
In this article
Symptoms
Prevention
Diagnosis
Treatment
Recovery
Medications
Common Questions
What Is Pneumonia?
Pneumonia is an infection in the lungs. It can be caused by bacteria, viruses, or fungi. The infection can inflame the air sacs in the lungs and fill them with fluid or pus.
What this means for you: Pneumonia is not just a bad cough. It can affect breathing, oxygen levels, strength, and overall health.
Common Symptoms and Warning Signs
Common pneumonia symptoms may include:
Cough, sometimes with mucus
Fever or chills
Chest pain when breathing or coughing
Shortness of breath
Fast breathing
Fatigue or weakness
Nausea, vomiting, or diarrhea
Watch for: In older adults, pneumonia may look different. New confusion, low alertness, sudden weakness, poor appetite, falls, or a lower-than-normal temperature can also be warning signs.^1
Why Pneumonia Matters
Pneumonia can lead to emergency care, hospitalization, oxygen needs, and a long recovery. CDC data show 1.2 million emergency department visits with pneumonia due to infectious organism as the primary diagnosis in 2022, and 41,627 deaths from pneumonia in 2024.^2
Why this matters: Pneumonia can reduce oxygen levels and strain the body before a person realizes how sick they are.
Causes and Risk Factors
Pneumonia happens when germs infect the lungs. Risk is higher for adults age 65 and older and people with chronic lung disease, heart disease, diabetes, kidney disease, weakened immune systems, swallowing problems, or a history of stroke.
Smoking, heavy alcohol use, recent hospitalization, poor nutrition, and recent respiratory infections can also increase risk.
People often do not realize: Pneumonia risk may rise after flu, COVID-19, RSV, or another respiratory illness because the lungs may already be stressed.
Prevention and Screening
There is no routine Medicare screening test for pneumonia itself. Prevention focuses on vaccination, hand hygiene, avoiding smoking, managing chronic conditions, and getting care early when symptoms appear.
CDC recommends pneumococcal vaccination for adults age 50 or older and for others at increased risk.^3 Pneumococcal vaccines help prevent certain types of pneumococcal disease, including some pneumonia, but they do not prevent every kind of pneumonia.
Why this matters: A pneumonia shot helps lower risk, but it does not replace medical care if symptoms develop.
Medicare Part B covers pneumococcal vaccines. These vaccines help prevent certain types of pneumococcal disease, including some pneumonia, but they do not prevent every kind of pneumonia.
How Pneumonia Is Diagnosed
A doctor may review symptoms, listen to the lungs, check oxygen levels, and consider medical history. Tests may include:
Chest X-ray
Pulse oximetry
Blood tests
Sputum testing
Flu, COVID-19, or RSV testing
CT scan in selected cases
What this means for you: The diagnosis may depend on how sick the person is, oxygen level, age, and other health conditions.
How Medicare May Cover Diagnosis
Medicare Part B generally covers medically necessary doctor visits, urgent care, outpatient hospital services, lab tests, X-rays, and other diagnostic testing. In Original Medicare, the Part B deductible and coinsurance may apply.
If pneumonia requires a formal inpatient hospital admission, Medicare Part A generally covers medically necessary inpatient hospital care after the Part A deductible.^4
What to watch for: Observation status is not the same as inpatient admission. Observation is usually outpatient Part B care, even if the person stays in the hospital overnight.
Treatment Options
Treatment depends on the cause and severity. Bacterial pneumonia may be treated with antibiotics. Viral pneumonia may require supportive care and sometimes antiviral medication. Fungal pneumonia may require antifungal medicine.
More serious pneumonia may require oxygen, IV fluids, IV medications, breathing treatments, hospital care, or intensive care.
Treatment goal: Treat the infection, support breathing, protect oxygen levels, and prevent complications.
Doctor visits, urgent care, observation, outpatient hospital care, inpatient admission, oxygen, and rehab may all be covered differently under Medicare.
How Medicare May Cover Treatment
Medicare Part B may cover outpatient pneumonia care, including doctor visits, urgent care, emergency department physician services, outpatient hospital care, lab work, imaging, and some durable medical equipment.
Medicare Part A may cover inpatient care if pneumonia requires formal hospital admission.
If oxygen is medically necessary for home use, Medicare Part B may cover oxygen equipment as durable medical equipment when coverage rules are met.^5
Helpful tip: Ask whether the service is being billed as outpatient, observation, or inpatient care. This can affect costs and later coverage for skilled nursing care.
Recovery and Rehabilitation
Recovery can take days to weeks, and fatigue or cough may last longer. Some people need follow-up visits, repeat testing, oxygen reassessment, therapy, or help rebuilding strength.
Recovery can be just as important as treatment itself. After serious pneumonia, older adults may lose stamina, balance, strength, and independence.
How Medicare May Cover Recovery or Rehab
Medicare Part B may cover medically necessary outpatient follow-up care and therapy services.
Medicare-covered home health may apply if the person is homebound and needs part-time or intermittent skilled nursing, physical therapy, speech-language pathology, or continued occupational therapy.^6
Skilled nursing facility care may be covered under Medicare Part A after a qualifying inpatient hospital stay and when other Medicare requirements are met.^7
What to watch for: Time spent in emergency care or observation usually does not count toward the three-day inpatient hospital requirement for skilled nursing facility coverage under Original Medicare.
Medications
Pneumonia medications may include antibiotics, antivirals, antifungals, fever reducers, cough medicines, inhalers, or nebulized medications.
Part D generally covers outpatient prescription drugs filled at a pharmacy, depending on the plan’s formulary, tiers, deductible, copays, prior authorization, step therapy, quantity limits, and pharmacy network.
Medications given during an inpatient hospital stay are generally covered as part of the Part A stay. Some medications given in a clinic or through covered durable medical equipment may fall under Part B.
Helpful question: Is this medication covered under Part B, Part D, or as part of my hospital stay?
Most outpatient pneumonia prescriptions are usually handled through Part D. Coverage depends on the plan’s formulary, drug tier, and pharmacy network.
What Medicare May Not Fully Cover
Costs to Watch
Costs may vary based on the setting of care, provider, supplier, and plan rules. Watch for:
Part A hospital deductible
Part B deductible and coinsurance
Observation status costs
Out-of-network costs in Medicare Advantage
Prior authorization requirements
Non-covered home support or custodial care
Drug formulary restrictions
DME supplier requirements
What to watch for: Medicare may cover pneumonia care, but the part of Medicare that pays can change depending on where the care happens.
Medicare Advantage Considerations
Medicare Advantage plans must cover Medicare-covered services, but plan rules can affect access and costs.
A plan may require in-network doctors, hospitals, labs, imaging centers, pharmacies, home health agencies, skilled nursing facilities, and durable medical equipment suppliers. Prior authorization may apply to oxygen equipment, nebulizers, post-hospital care, imaging, therapy, or certain medications.
Helpful tip: Before discharge from a hospital, ask which rehab facilities, home health agencies, oxygen suppliers, and pharmacies are in network.
Common Questions
What are red flags for pneumonia?
Red flags include trouble breathing, chest pain, blue lips or fingernails, confusion, low alertness, severe weakness, dehydration, worsening symptoms, or symptoms that improve and then suddenly get worse. Seek urgent medical care if these occur.
How long does pneumonia last?
Mild pneumonia may improve within a week or two, but cough and fatigue can last longer. Recovery may take several weeks, especially for older adults or people with chronic conditions. Serious pneumonia may require hospital care and a longer recovery plan.
Does Medicare cover the pneumonia vaccine?
Medicare Part B covers pneumococcal vaccines. Medicare.gov says you pay nothing for pneumococcal shots if your doctor or other qualified health care provider accepts assignment.^8
Does Medicare cover oxygen after pneumonia?
Medicare Part B may cover oxygen equipment for home use when it is medically necessary, ordered by a doctor, and supplied by a Medicare-approved supplier.^5
What to Do Next
If pneumonia is suspected, contact a health care provider promptly. Ask what symptoms require urgent care, whether testing is needed, and whether treatment should happen at home, in an outpatient setting, or in the hospital.
Helpful tip: Before leaving a hospital or urgent care visit, ask for clear instructions about medications, follow-up visits, oxygen use, activity level, and warning signs.
Learn more about Medicare
Key Takeaways
Pneumonia is a lung infection that can become serious, especially for older adults.
Medicare may help cover vaccines, diagnosis, treatment, medications, oxygen, home health, and rehab when requirements are met.
Coverage depends on medical necessity, setting of care, documentation, and plan rules.
Observation and inpatient admission are not the same.
Medicare Advantage members should check networks, prior authorization, pharmacy rules, and supplier requirements.
References
This website is for educational purposes only. It isn’t medical advice, legal advice, or financial advice. It also isn’t a promise of coverage or payment. For official Medicare information, visit Medicare.gov. You can also get free, unbiased help from your State Health Insurance Assistance Program (SHIP). For personal medical guidance, talk with your doctor, and review your Medicare plan documents.