Tommy Yu-Do Yen, M.D.
Gastroenterology · Internal Medicine (CMS) · San Diego, CA
At a glance
200 W Arbor Dr, San Diego, CA 92103-9000
Published activity: Colonoscopy · Upper gastrointestinal (GI) endoscopy for acid reflux. View counts and coverage
NPPES record updated Aug 17, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
200 W Arbor DrSan Diego, CA 92103-9000
Additional reported practice locations
9350 Campus Point DrLa Jolla, CA 920371300
Phone: 8009268273
Fax: 8885398781 9300 Campus Point Dr
La Jolla, CA 920371300
Phone: 8009268273
Fax: 8885398781 4250 1St Ave
San Diego, CA 921032026
Phone: 8009268273
Fax: 8885398781 6699 Alvarado Rd Ste 2301
San Diego, CA 921205241
Phone: 6195884074
Fax: 6195884004 9456 Cuyamaca St Ste 102
Santee, CA 920715919
Phone: 6195884074
Fax: 6195884004 6655 Alvarado Rd
San Diego, CA 921205208
Phone: 8009268273
Fax: 8885398781
Education & affiliations
- Medical / professional school
- University Of California, San Diego School Of Medicine
- Graduation year
- 1994
- CMS specialties
- Gastroenterology · Internal Medicine
Practice groups
- Barton Medical Foundation
- Regents Of The University Of California
- Sharp Rees-Stealy Medical Group Inc
- St Josephs Medical Center
Reported hospital affiliations
- Barton Memorial Hospital South Lake Tahoe, CA
- Essentia Health St Joseph's Medical Center Brainerd, MN
- Grossmont Hospital La Mesa, CA
- Sharp Memorial Hospital San Diego, CA
- Uc San Diego Health Hillcrest - Hillcrest Med Ctr San Diego, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Colonoscopy | 71 |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 36 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $1,956.75 |
Reporting companies
| Company | Amount |
|---|---|
| MADRIGAL PHARMACEUTICALS | $1,175.71 |
| REGENERON PHARMACEUTICALS, INC. | $150.01 |
| IPSEN BIOPHARMACEUTICALS, INC | $139.17 |
| JANSSEN BIOTECH, INC. | $133.37 |
| SALIX PHARMACEUTICALS, A DIVISION OF BAUSCH HEALTH US, LLC | $125.00 |
| GILEAD SCIENCES, INC. | $109.91 |
| ABBVIE INC. | $107.26 |
| PFIZER INC. | $16.32 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Gastroenterology · Internal Medicine (CMS)
- Taxonomy code
- 207RG0100X
- Enumeration date
- Aug 30, 2006
- Record updated
- Aug 17, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207RI0008X
License reported: 60085 CA
207R00000X
License reported: 60085 CA
207RG0100X · Primary
License reported: 60085 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
200 W Arbor DrSan Diego, CA 92103-9000
- Phone
- (800) 926-8273
- Fax
- (888) 539-8781
Mailing address
FILE 57326LOS ANGELES, CA 900747326
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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