Aaron Zachary Hettinger, MD in Baltimore: Emergency Medicine Physician at a Major Urban Hospital

Aaron Zachary Hettinger is an emergency medicine physician based in Baltimore's hospital system, providing acute care to patients arriving at the emergency department. His practice sits within the high-volume, 24/7 model of urban emergency medicine, where decisions must be made quickly and care spans trauma, cardiac events, sepsis, pediatric emergencies, and everything in between.

What the emergency department actually is

The emergency department is the entry point for unscheduled, acute medical and surgical conditions. Unlike urgent care, the ED operates around the clock and can handle trauma, resuscitation, imaging, and admission to inpatient beds. Hettinger's role as an emergency physician means he evaluates and stabilizes patients across all ages and acuity levels, then either discharges them, refers them to specialists, or admits them for inpatient care. Baltimore's EDs are staffed to handle the city's particular injury burden, including penetrating trauma, and the chronic conditions that drive many unscheduled visits (asthma, diabetes, hypertension, substance-use-related emergencies).

Services and typical timelines

Emergency physicians like Hettinger evaluate presenting complaints through history, physical exam, and diagnostic testing. Common ED presentations include chest pain, shortness of breath, abdominal pain, head injury, acute stroke, severe infections, overdose, and injuries from falls or interpersonal violence. Diagnostic workup may include blood tests, EKGs, X-rays, CT imaging, and ultrasound. ED visits typically include triage (which may have a wait), initial evaluation, diagnostic work, and disposition. Door-to-provider time varies but is often 30 minutes to an hour during high-volume periods.

There is no "pricing" for an ED visit in the traditional sense. When you arrive, you are evaluated regardless of ability to pay. Bills afterward depend on your insurance coverage and negotiated rates between the hospital and payers. Uninsured patients may qualify for hospital financial assistance programs or state Medicaid coverage. The cost of an emergency visit in a major Baltimore hospital typically runs $500 to $2,500 before any procedures, imaging, or admission charges; exact amounts are determined after billing review.

When to go to the ED versus urgent care

The key distinction is acuity and capability. Go to the ED if you have chest pain, difficulty breathing, severe bleeding, signs of stroke, sudden severe pain, unconsciousness, or serious injury. Go to urgent care for minor cuts, sprains, mild infections, and routine issues that do not require imaging or admission. Many Baltimore residents use urgent-care chains (like CareFirst-affiliated urgent care or CVS MinuteClinic locations) for after-hours illness because wait times are usually shorter than the ED. However, urgent cares cannot admit you, cannot perform advanced imaging rapidly, and cannot manage unstable cardiac or trauma cases. Hettinger's expertise is deployed in exactly the settings urgent care cannot handle.

Who benefits from this level of care

Patients with life-threatening or organ-threatening emergencies. This includes anyone with acute chest pain, stroke symptoms, severe infection, trauma, uncontrolled bleeding, severe allergic reactions, and complicated medical exacerbations. Patients with chronic conditions (heart disease, diabetes, asthma, COPD) who experience acute worsening also rely on the ED because outpatient offices cannot respond in minutes to sudden decompensation.

Those with minor illnesses or injuries are better served by urgent care, telemedicine, or a primary-care physician appointment. The ED is not the right setting for routine colds, mild sprains, or follow-up questions about medication.

What your first ED visit involves

Upon arrival, you check in at the front desk and are triaged by a nurse who asks about your chief complaint and vital signs. Triage determines which room or waiting area you go to; higher-acuity patients (chest pain, difficulty breathing, altered mental status) go directly into monitored beds. Lower-acuity patients may wait in the waiting room. Once a physician like Hettinger sees you, he or she takes a focused history, performs a targeted physical exam, and orders tests. Depending on findings, you may be discharged with instructions, referred to a specialist, or admitted. Total time in the ED ranges from 1 to 8+ hours depending on volume, complexity, and whether imaging or specialist involvement is needed.

Hours and logistics

The ED operates 24 hours a day, 7 days a week, 365 days a year. There is no appointment; you arrive by walking in or by ambulance. Parking at Baltimore's major hospitals varies: some have dedicated parking garages (often $10 to $20 per visit), and financial assistance programs sometimes include parking reductions. Call ahead only if you are curious about current wait times; this does not speed triage or treatment. If you are unable to drive, call 911 for an ambulance.

Why this matters in Baltimore

Baltimore's ED physicians manage a city-specific injury pattern and a population with high rates of chronic disease and limited outpatient access. Hettinger's work in emergency medicine keeps the city's safety net functioning and serves as the real backstop for residents who have nowhere else to go. His presence in the system reflects Baltimore's need for experienced acute-care physicians who can make split-second decisions in high-pressure settings.