Dr. David S. Chung, MD
Gastroenterology (Gastroenterology Physician)
23451 Madison St Ste 290
Torrance, CA 90505
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
- Medical College of Wisconsin (1998)
- Years since graduation
- 28
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 265
Licensed in California since 2001, 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
- 1998Medical school: Medical College of Wisconsin
- 2006Registered 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
-
Gastroenterology Physician primary
CA license A74862 (first issued 2001; current)
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
- Providence Little Company of Mary Med Ctr Torrance Torrance, CA
Medical groups
- Digestive Care Consultants (15 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
- 265
- Services billed
- 789
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | 163 | 46 |
| Established patient office or other outpatient visit, 30-39 minutes | 136 | 86 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 66 | 65 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 56 | 26 |
| Biopsy of large bowel using a flexible endoscope | 55 | 55 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 50 | 50 |
| New patient office or other outpatient visit, 45-59 minutes | 44 | 44 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 32 | 30 |
| Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 21 | 20 |
| Control of bleeding of upper large bowel using a flexible endoscope | 18 | 18 |
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 |
|---|---|
| Omeprazole Other prescribers in Torrance, CA | 260 |
| Famotidine Other prescribers in Torrance, CA | 112 |
| Gavilyte-G (peg3350/sod sulf,bicarb,cl/kcl) Other prescribers in Torrance, CA | 78 |
| Dicyclomine Hcl Other prescribers in Torrance, CA | 59 |
| Pantoprazole Sodium Other prescribers in Torrance, CA | 45 |
| Linzess (linaclotide) Other prescribers in Torrance, CA | 32 |
| Ursodiol Other prescribers in Torrance, CA | 32 |
| Ondansetron Hcl Other prescribers in Torrance, CA | 29 |
| Peg-3350 And Electrolytes (peg3350/sod sulf,bicarb,cl/kcl) Other prescribers in Torrance, CA | 28 |
| Enulose (lactulose) Other prescribers in Torrance, CA | 18 |
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, 9 companies reported 31 payments worth $1,498 in total to this clinician.
| Janssen Biotech, Inc. | $767 |
|---|---|
| AbbVie Inc. | $223 |
| DePuy Synthes Sales Inc. | $145 |
| Pfizer Inc. | $103 |
| Olympus America Inc. | $100 |
| Gilead Sciences, Inc. | $65.63 |
| Intercept Pharmaceuticals, Inc. | $49.16 |
| Ardelyx, Inc. | $30.17 |
| Food and Beverage | $844 |
|---|---|
| Travel and Lodging | $555 |
| Education | $99.00 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Janssen Biotech, Inc. Feb 12, 2025 | Travel and Lodging TREMFYA · Immunology · travel to REDONDO BEACH, CA · in-kind | $555 |
| Janssen Biotech, Inc. Jun 30, 2025 | Education TREMFYA · Immunology · in-kind | $99.00 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.