Proton Therapy in Baltimore: What's Available and How to Access It

Proton beam radiation therapy represents a different approach to cancer treatment than conventional X-ray radiation. This guide explains how proton therapy works, where to receive it in Baltimore, what to expect in terms of logistics and cost, and how to determine whether it's appropriate for your situation.

How Proton Therapy Differs from Conventional Radiation

Conventional radiation therapy (photon therapy) using X-rays delivers energy throughout the body as the beam passes through tissue, causing damage both before and after reaching the tumor. Proton therapy uses charged particles that deposit most of their energy at a specific depth, called the Bragg peak, minimizing exposure to surrounding healthy tissue and organs beyond the tumor site.

This distinction matters most for pediatric cancers, head and neck tumors near critical structures, breast cancer in younger patients, and prostate cancer. Patients treated with proton therapy typically experience fewer long-term side effects and lower secondary cancer risk, particularly important when the patient has decades of life ahead. For some tumor types and locations, the clinical benefit is modest, which is why proton therapy is not universally recommended.

The Maryland Proton Treatment Center

The University of Maryland Medical Center in Baltimore operates a proton therapy facility located in the East Baltimore medical complex near the main hospital campus on Greene Street. The center became operational in 2016 and serves patients across Maryland and neighboring states.

The facility includes three treatment rooms equipped with gantry systems that allow beam delivery from multiple angles. Treatment planning uses CT and MRI imaging to define the tumor and surrounding structures, then calculates the optimal proton beam arrangement. A typical course of proton therapy ranges from 5 to 35 treatments depending on the tumor type, size, and location. Treatments are typically delivered Monday through Friday, with each session lasting 30 to 45 minutes (though most time involves positioning and imaging rather than the radiation delivery itself, which takes only a few minutes).

Cost and Insurance Coverage

Proton therapy costs approximately $25,000 to $35,000 per treatment course at the University of Maryland facility, with variation based on the number of sessions and complexity of planning. Most major insurance plans cover proton therapy when it is clinically indicated, but coverage requires prior authorization and documentation that the treatment meets medical necessity criteria for the specific diagnosis.

Medicare covers proton therapy for approved diagnoses including pediatric malignancies, certain head and neck cancers, some CNS tumors, and select other indications. Commercial insurers vary; some require evidence that proton therapy provides measurable clinical advantage over conventional radiation for the specific case. Out-of-pocket costs depend on your plan's deductible, copay structure, and whether the facility is in-network. The University of Maryland facility participates in most major insurance networks serving the Baltimore region.

Uninsured patients should discuss payment plans and potential charity care options directly with the center's financial counselor before beginning treatment.

Clinical Referral Process

Radiation oncologists at Johns Hopkins Hospital, University of Maryland Medical Center, Sinai Hospital, and other cancer centers throughout Baltimore routinely refer appropriate patients to the Maryland Proton Treatment Center. You do not need to self-refer; your oncologist or radiation oncologist will determine whether proton therapy is indicated for your cancer.

If your oncologist has not mentioned proton therapy and you have concerns that it might benefit your treatment, ask specifically whether it was considered for your case and why it was or was not recommended. Some cancers have clear guidelines favoring proton therapy; others have insufficient evidence to support it, and conventional radiation remains standard.

The referral process typically involves submacting imaging (CT, MRI, or PET scans) and your medical records to the proton center's physician team for review. If the case is appropriate, the center schedules an initial consultation. This consultation includes a detailed history, physical examination, and review of imaging. If proton therapy is deemed appropriate, treatment planning begins immediately.

Treatment Planning and Scheduling

Once your case is approved, the planning process takes 1 to 3 weeks. During planning, you undergo simulation, a specialized CT scan used to map the tumor and normal tissues in precise detail. Some plans require MRI fusion to better define soft tissue targets. The radiation physics team then uses computer optimization to design the proton beam arrangement that delivers maximum dose to the tumor while minimizing dose to adjacent organs.

Scheduling for daily treatment depends on the facility's capacity. Wait times from plan completion to treatment start have historically ranged from 1 to 4 weeks at the University of Maryland center, though this varies seasonally. Ask your radiation oncologist about expected timing when your plan is approved.

Side Effects and Monitoring

Acute side effects during proton therapy depend on the treatment location. Head and neck patients often experience mouth dryness, difficulty swallowing, and skin irritation. Chest wall treatments may cause fatigue and mild skin changes. Pelvic treatments can cause bowel and bladder symptoms. Pediatric patients tolerate treatment well physically but require anesthesia for positioning if they cannot cooperate with immobilization.

Late effects (occurring months to years after treatment) are reduced with proton therapy compared to photon therapy, particularly for secondary malignancies and dose to growing bone and developing organs in children.

During treatment, you are monitored by your radiation oncologist weekly. Imaging (often cone-beam CT, which is taken at each treatment session) tracks tumor response and assesses normal tissue tolerance. After treatment ends, follow-up schedules depend on your cancer type and overall treatment plan, coordinated with your medical oncologist and surgical team if applicable.

Practical Considerations for Daily Treatment

Baltimore traffic and weather patterns matter when planning a 5 to 8-week treatment course. The East Baltimore medical complex is accessible by public transit via the MTA Red Line (Central Avenue and North Avenue stops are nearby) and local bus routes. Free parking is available at the University of Maryland Medical Center campus, though peak hours in the morning and late afternoon can create congestion. Many patients arrange transportation through local cancer support organizations or hospital social work departments if driving daily is not feasible.

The facility is located approximately 2 miles from downtown Baltimore, 8 miles from the Inner Harbor, and serves patients from throughout the Baltimore metropolitan area, including Howard County, Carroll County, and Northern Maryland.

If you are from outside the immediate area and cannot commute daily, ask the center's social work team about nearby accommodations and lodging resources.

When to Consider Proton Therapy

Proton therapy is most clearly beneficial for pediatric malignancies, early-stage prostate cancer in younger men, head and neck cancer when critical structures (spinal cord, brainstem, salivary glands) are close to the tumor, and certain lymphomas. It is also used for some lung cancers, breast cancers, and CNS tumors.

For many common adult cancers (advanced head and neck cancer, extensive lung cancer, high-risk prostate cancer requiring combined modality treatment), the clinical advantage of proton therapy over photon therapy is not well established. Your radiation oncologist can explain the evidence base for your specific situation.

Start by asking your medical oncologist whether proton therapy was considered in your treatment plan and, if not, whether a consultation with a radiation oncologist at the Maryland Proton Treatment Center would be appropriate. The center's physicians can review your imaging and history and provide a clear recommendation.