Where to Get Imaging Done in Chattanooga: Options Across Hospital Systems and Independent Centers

When you need an X-ray, MRI, CT scan, or ultrasound in Chattanooga, you have choices that affect both access speed and cost. This guide covers the major imaging locations, their operating models, and what to expect at each, so you can match your clinical need and insurance to the right facility.

Hospital-Based Imaging: Erlanger and Parkridge Systems

Erlanger Health System operates the largest imaging footprint in the city. The main campus on East 3rd Street houses a full diagnostic imaging department with CT, MRI, PET, ultrasound, and X-ray, serving both inpatients and outpatients. Erlanger's network extends to East Brainerd and Hixson satellite locations, each equipped for routine radiography and basic ultrasound, with more complex studies referred back to the main campus. Imaging ordered through Erlanger physicians routes naturally into their system; if you're an outpatient without an Erlanger referral, you can self-schedule at these locations, though wait times for non-urgent MRI can stretch to two to three weeks during high-volume periods.

Parkridge Medical Center, based on Dodds Avenue in North Shore, operates its own imaging suite with CT, MRI, X-ray, and ultrasound. Parkridge's imaging department serves Parkridge inpatients as priority, then outpatient referrals. The North Shore location is more compact than Erlanger's main campus, which can mean shorter waits for routine studies but potential routing to Erlanger facilities for specialized protocols. If your referring physician is Parkridge-affiliated, scheduling through Parkridge is seamless; if not, the department accepts outside referrals.

Both systems require active prescriptions from a licensed provider; walk-in imaging without a medical order is not available at hospital facilities.

Independent Imaging Centers: Speed and Accessibility

Chattanooga has several independent diagnostic imaging centers that operate on different scheduling and pricing models than hospital departments. These facilities typically handle routine outpatient imaging: X-ray, ultrasound, and basic CT. MRI availability varies; some centers have in-house MRI units, while others subcontract longer, more specialized scans to hospital partners.

Independent centers generally schedule faster than hospital systems for routine studies. A patient needing a chest X-ray or abdominal ultrasound can often be seen within 24 to 48 hours, compared to one to two weeks at hospital outpatient departments during peak demand. The trade-off is scope: independent centers do not handle inpatient imaging, trauma imaging, or complex interventional procedures. They are built for straightforward diagnostic work.

Pricing at independent centers is often transparent upfront. Many post self-pay cash rates that are lower than the negotiated insurance rates; for example, a routine CT scan might be listed at $400 to $600 out of pocket at an independent center, versus a hospital's negotiated rate of $800 to $1,200 that an insurer then partially covers. If you are uninsured or have high deductibles, calling ahead to ask about self-pay pricing is worthwhile.

Independent centers do require a physician's order, but some centers can accept e-faxed prescriptions same-day, shortening the path from referral to appointment.

Location Considerations: Geography and Hours

Erlanger's East 3rd Street campus is in downtown Chattanooga, accessible from I-75 and I-24; parking is hospital-lot parking, typically free for outpatient imaging. The East Brainerd and Hixson satellite locations serve their respective neighborhoods and reduce travel time for patients on the east side of the city.

Parkridge on Dodds Avenue is north of downtown, near the North Shore district. It has dedicated outpatient parking separate from hospital parking, reducing confusion for imaging-only visits.

Independent centers are often located in office parks or medical office buildings across the city. Locations in Hixson, near Hamilton Place, and in East Brainerd are common, chosen for accessibility and lower overhead than hospital real estate. Hours at independent centers often extend into early evening and sometimes include Saturday mornings, addressing the gap left by hospital departments that operate primarily 7 a.m. to 5 p.m., Monday through Friday.

Referral and Insurance Workflows

If you have insurance, confirm whether your plan requires imaging to be performed at an in-network facility. Most major plans contract with both Erlanger and Parkridge systems. Coverage of independent centers varies: some plans reimburse at a standard rate regardless of facility type, while others limit reimbursement to hospital-affiliated imaging. Calling your insurance customer service line before scheduling eliminates surprise balance bills.

If your referral comes from a physician employed by or affiliated with one system (Erlanger or Parkridge), imaging typically routes there automatically unless you request otherwise. Patients can request out-of-network imaging, but must usually handle scheduling themselves and may see reduced reimbursement.

For self-pay patients or those with very high deductibles, calling the independent center directly to discuss cost before scheduling is standard practice and often yields price quotes on the same call.

Prior Authorization and Timing

Imaging at all Chattanooga facilities requires a current physician's order. Some insurance plans require prior authorization for MRI, advanced CT protocols, or PET scans, adding 24 to 48 hours to the scheduling timeline. Your referring physician's office or the imaging facility's scheduling department can verify authorization requirements when you call to schedule. Hospital-based imaging departments often handle pre-authorization as part of the scheduling call; independent centers sometimes ask the patient or patient's physician to confirm authorization before the appointment is booked.

Same-Day and Urgent Imaging

Emergencies and urgent imaging needs should go to the nearest emergency department or urgent care, which have on-site imaging available immediately. Erlanger's Emergency Department on East 3rd Street and Parkridge's Emergency Department on Dodds Avenue both operate 24/7 with full imaging support.

For non-emergent imaging needed within 24 to 48 hours, independent centers are faster. For routine imaging with no time pressure, hospital outpatient departments are appropriate and often carry your insurance with no out-of-pocket imaging facility fee.

Practical Next Step

Start by identifying whether you have an active referral. If yes, call the facility your referring physician recommended or your insurance plan's nurse line to verify in-network status. Ask three questions: what imaging facility is in-network for your plan, what the estimated out-of-pocket cost is, and whether pre-authorization is required. If you need imaging urgently and have no referral, contact an urgent care or your primary care physician for a same-day order, then call an independent center for same-day or next-day scheduling.