Stephen Yau, MD
NPI 1689037376 · Cardiovascular Disease Physician · Chula Vista, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Yau, MD is a Cardiovascular Disease Physician provider in Chula Vista, CA (NPI 1689037376).
Provider details
- NPI number
- 1689037376
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 151069 (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
10 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
1,842 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 590 | $124 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 387 | $16 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 213 | $70 |
| Heart Muscle Strain Imaging93356 | 154 | $42 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 133 | $177 |
| Nuclear Medicine Studies of Heart Muscle at Rest and With Stress and Spect |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 306 | 97 |
| Atorvastatin Calcium | 251 | 102 |
| Amlodipine Besylate | 210 | 83 |
| Metoprolol Succinate | 199 | 92 |
| Furosemide | 181 | 72 |
| Losartan Potassium | 165 | 54 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$162 across 3 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
- 2016-03-31
- Last updated
- 2022-06-21
- Certified
- 2022-06-21
Frequently asked questions
- What is Stephen Yau's NPI number?
- Stephen Yau's National Provider Identifier (NPI) is 1689037376, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Yau's specialty?
- Stephen Yau is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Yau located?
- Stephen Yau's practice location on file with NPPES is 429 Broadway, Chula Vista, CA 91910-4320.
- What is Stephen Yau's phone number?
- The practice phone number listed in the NPPES registry for Stephen Yau is (619) 434-0204.
- Does Stephen Yau accept Medicare?
- Stephen Yau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Yau's NPI active?
- Yes — Stephen Yau's NPI (1689037376) is active in the NPPES registry as of the last update on 2022-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.