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Edit this profileWhere to find Tommy Y. Yen, M.D.
- San Diego location main office
200 W Arbor Dr, San Diego, CA 92103 - La Jolla location
9350 Campus Point Dr, La Jolla, CA 92037 - San Diego location
6699 Alvarado Rd Ste 2301, San Diego, CA 92120 - La Jolla location
9300 Campus Point Dr, La Jolla, CA 92037 - San Diego location
6655 Alvarado Rd, San Diego, CA 92120
About Dr. Yen
Based in San Diego, CA, Tommy Y. Yen, M.D. is listed in the NPI registry under gastroenterology. Tommy graduated from University of California, San Diego School of Medicine in 1994. Tommy is also listed as specializing in internal medicine. According to Medicare claims data, Tommy cared for 455 Medicare patients across 924 services. The services billed most often include injection, midazolam hydrochloride, per 1 mg, moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monit, and injection, fentanyl citrate, 0.1 mg. NPI 1053421958 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (800) 926-8273
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
200 W ARBOR DR
San Diego, CA 92103
9350 Campus Point Dr
La Jolla, CA 92037
6699 Alvarado Rd Ste 2301
San Diego, CA 92120
9300 Campus Point Dr
La Jolla, CA 92037
6655 Alvarado Rd
San Diego, CA 92120
9456 Cuyamaca St Ste 102
Santee, CA 92071
4250 1st Ave
San Diego, CA 92103
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Chronic conditions
Liver health
Specialized and cancer
Wound care
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Advanced endoscopy
Biliary and pancreatic endoscopy
Capsule and physiology testing
- Ambulatory reflux monitoring
- Capsule endoscopy
- Hydrogen and methane breath testing
- Anorectal manometry
- Esophageal manometry
Chronic illness
Clinical Nutrition
Diagnostic Testing
Digestive
General surgery
Infection & Microbiology Tests
Liver procedures
Lower endoscopy
- Colon polyp removal
- Diagnostic colonoscopy
- Endoscopic control of gastrointestinal bleeding
- Flexible sigmoidoscopy
Nursing care
Nutrition & Digestion
Upper endoscopy
- Endoscopic mucosal resection
- Esophageal biopsy
- Esophageal dilation
- Stomach biopsy
- Endoscopic submucosal dissection
Most searched procedures
Treatments
Procedures Most Often Billed to Medicare
924 services · 455 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
29 | Less often than most peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
20 | Less often than most peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
17 | Less often than most peers in Gastroenterology |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
15 | Less often than most peers in Gastroenterology |
| Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes | Treatment | 99153 |
74 | More often than most peers in Gastroenterology |
| Injection, midazolam hydrochloride, per 1 mg | Drug given | J2250 |
548 | More often than most peers in Gastroenterology |
| Injection, fentanyl citrate, 0.1 mg | Drug given | J3010 |
90 | More often than most peers in Gastroenterology |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monit | Billing code | G0500 |
103 | More often than most peers in Gastroenterology |
| Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Billing code | G0121 |
17 | As often as other peers in Gastroenterology |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
11 | Less often than most peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterologists in San Diego 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of California, San Diego School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1994 at University of California, San Diego School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of polyps or growths of large bowel using an endoscope with mechanical snare 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Tommy Y. Yen?
Tommy Y. Yen is a gastroenterologist in San Diego, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
What is Tommy Y. Yen's address?
Tommy Y. Yen is listed at 200 W Arbor Dr, San Diego, CA 92103. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Tommy Y. Yen?
The number on file is (800) 926-8273. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Tommy Y. Yen's NPI number?
Tommy Y. Yen's National Provider Identifier is 1053421958. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Tommy Y. Yen train?
Tommy Y. Yen attended University of California, San Diego School of Medicine, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How long has Tommy Y. Yen been practicing?
Tommy Y. Yen has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What procedures does Tommy Y. Yen perform?
According to Medicare billing data, Tommy Y. Yen performs procedures including removal of polyps or growths of large bowel using an endoscope with mechanical snare, biopsy of large bowel using a flexible endoscope and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope; provides treatments such as use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Tommy Y. Yen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Tommy Y. Yen. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.