Dr. Eileen Y. Chang
Emergency Medicine (Emergency Medicine Physician)
4101 Torrance Blvd, Em Dept
Torrance, CA 90503
Who else practices at this address →
Los Angeles County includes primary care (7% of residents) and mental health (13% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Northwestern University Feinberg Medical School (2005)
- Years since graduation
- 21
- In the NPI registry since
- 2007
- Medicare patients seen, 2024
- 350
Licensed in California since 2010, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2005Medical school: Northwestern University Feinberg Medical School
- 2007Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Emergency Medicine Physician primary
CA license A111171 (first issued 2010; current) · MA license 224652
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Torrance Memorial Medical Center Torrance, CA
Medical groups
- Torrance Emergency Physicians Inc (22 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 350
- Services billed
- 455
- Patients’ average age
- 70
| Service | Times | Patients |
|---|---|---|
| Emergency department visit with high level of medical decision making | 261 | 253 |
| Critical care, first 30-74 minutes | 85 | 84 |
| Electrocardiogram (ecg) 1 to 3 leads with review by physician only | 77 | 77 |
| Emergency department visit with moderate level of medical decision making | 65 | 65 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Ondansetron Odt (ondansetron) Other prescribers in Torrance, CA | 129 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in Torrance, CA | 65 |
| Cephalexin Other prescribers in Torrance, CA | 53 |
| Amoxicillin-Clavulanate Potass (amoxicillin/potassium clav) Other prescribers in Torrance, CA | 31 |
| Ibuprofen Other prescribers in Torrance, CA | 30 |
| Lactulose Other prescribers in Torrance, CA | 24 |
| Doxycycline Hyclate Other prescribers in Torrance, CA | 23 |
| Cyclobenzaprine Hcl Other prescribers in Torrance, CA | 11 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $24.71 in total to this clinician.
| E.r. Squibb & Sons, L.l.c. | $24.71 |
|---|
| Food and Beverage | $24.71 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.