Tsuh-Yin Chen, MD
NPI 1093803520 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tsuh-Yin Chen, MD is a Internal Medicine Physician provider in San Diego, CA (NPI 1093803520).
Provider details
- NPI number
- 1093803520
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- C55563 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
65 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 65 | $9 |
Typical Medicare-allowed amounts for these services range $9–$9 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 98 | 34 |
| Metformin Hcl | 92 | 27 |
| Lisinopril | 56 | 17 |
| Amlodipine Besylate | 45 | 16 |
| Semaglutidebrand: Ozempic | 37 | — |
| Losartan Potassium | 35 | 16 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$606 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-10
- Last updated
- 2016-10-20
Frequently asked questions
- What is Tsuh-Yin Chen's NPI number?
- Tsuh-Yin Chen's National Provider Identifier (NPI) is 1093803520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tsuh-Yin Chen's specialty?
- Tsuh-Yin Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tsuh-Yin Chen located?
- Tsuh-Yin Chen's practice location on file with NPPES is 3544 30th St, San Diego, CA 92104-4120.
- What is Tsuh-Yin Chen's phone number?
- The practice phone number listed in the NPPES registry for Tsuh-Yin Chen is (619) 515-2300.
- Does Tsuh-Yin Chen accept Medicare?
- Tsuh-Yin Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tsuh-Yin Chen's NPI active?
- Yes — Tsuh-Yin Chen's NPI (1093803520) is active in the NPPES registry as of the last update on 2016-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.