Da Ouyang, MD
NPI 1235549460 · Cardiovascular Disease Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Da Ouyang, MD is a Cardiovascular Disease Physician provider in Santa Clara, CA (NPI 1235549460).
Provider details
- NPI number
- 1235549460
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
447 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) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 232 | $73 |
| Critical Care, First 30-74 Minutes99291 | 85 | $222 |
| Ultrasound of Heart, Follow-Up93308 | 51 | $26 |
| Ultrasound of Heart Blood Flow, Valves and Chambers, Follow-Up93321 | 41 | $7 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate and Valve Function93325 | 38 | $3 |
Typical Medicare-allowed amounts for these services range $3–$222 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$121 across 1 record (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
Additional practice locations (2)
- 300 Pasteur DriveLane 154Stanford, CA 94305-5133Phone: (650) 723-6661Fax: (650) 498-6205
- 8700 Beverly BlvdWest Hollywood, CA 90048-1804Phone: (310) 423-2726Fax: (310) 423-6795
Registry dates
- Enumerated
- 2014-04-28
- Last updated
- 2025-01-02
- Certified
- 2025-01-02
Frequently asked questions
- What is Da Ouyang's NPI number?
- Da Ouyang's National Provider Identifier (NPI) is 1235549460, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Da Ouyang's specialty?
- Da Ouyang is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Da Ouyang located?
- Da Ouyang's practice location on file with NPPES is 700 Lawrence Expy, Santa Clara, CA 95051-5173.
- What is Da Ouyang's phone number?
- The practice phone number listed in the NPPES registry for Da Ouyang is (408) 851-1000.
- Does Da Ouyang accept Medicare?
- Da Ouyang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Da Ouyang's NPI active?
- Yes — Da Ouyang's NPI (1235549460) is active in the NPPES registry as of the last update on 2025-01-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.