David Chang, MD
NPI 1265453724 · Vascular Surgery Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Chang, MD is a Vascular Surgery Physician provider in San Jose, CA (NPI 1265453724).
Provider details
- NPI number
- 1265453724
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G74257 (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
300 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 143 | $110 |
| Ultrasound of Hemodialysis Access93990 | 47 | $173 |
| Complete Ultrasound of Aorta, Vena Cava, Groin Vessels Or Bypass Grafts93978 | 39 | $240 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 22 | $255 |
| Ultrasound of Leg Arteries Or Artery Grafts93925 | 20 | $326 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 16 | $252 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Apixabanbrand: Eliquis | 25 |
| Rivaroxabanbrand: Xarelto | 21 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24 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
Registry dates
- Enumerated
- 2006-07-21
- Last updated
- 2008-05-12
Frequently asked questions
- What is David Chang's NPI number?
- David Chang's National Provider Identifier (NPI) is 1265453724, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Chang's specialty?
- David Chang is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is David Chang located?
- David Chang's practice location on file with NPPES is 2512 Samaritan Ct, San Jose, CA 95124-4002.
- What is David Chang's phone number?
- The practice phone number listed in the NPPES registry for David Chang is (408) 358-8272.
- Does David Chang accept Medicare?
- David Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Chang's NPI active?
- Yes — David Chang's NPI (1265453724) is active in the NPPES registry as of the last update on 2008-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.