Ancillary services are supportive or diagnostic measures that supplement and support a primary physician, nurse, or other healthcare provider in treating a patient.
Some examples of ancillary services include:
- Imaging tests (e.g., X-rays, MRI, CT scan, ultrasound)
- Lab tests
- Physical therapy
Ancillary services are typically found in medical offices, hospitals, or free-standing diagnostic testing facilities. Additionally, a patient may have to go to a separate facility to receive ancillary services. For example, a primary care physician may refer a patient to an imaging center for an X-ray.