Dan Dang, M.D.
NPI 1639351125 · Cardiovascular Disease Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dan Dang, M.D. is a Cardiovascular Disease Physician provider in San Jose, CA (NPI 1639351125).
Provider details
- NPI number
- 1639351125
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A90388 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
6,735 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 | 2,663 | $155 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 611 | $61 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 599 | $66 |
| Technetium Tc-99m Sestamibi, Diagnostic, Per Study DoseA9500 | 590 | $195 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 449 | $47 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Carvedilol | 5,634 | 1,664 |
| Isosorbide Dinitrate | 3,532 | 1,057 |
| Nitroglycerin | 2,367 | 1,194 |
| Amlodipine Besylate | 2,047 | 698 |
| Omega-3 Acid Ethyl Esters | 1,725 | 684 |
| Pantoprazole Sodium | 1,251 | 449 |
| Ranolazinebrand: Ranolazine Er | 1,200 | 357 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,560 across 68 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
- 2007-11-27
- Last updated
- 2017-01-06
Frequently asked questions
- What is Dan Dang's NPI number?
- Dan Dang's National Provider Identifier (NPI) is 1639351125, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dan Dang's specialty?
- Dan Dang is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Dan Dang located?
- Dan Dang's practice location on file with NPPES is 969 Story Rd, San Jose, CA 95122-2690.
- What is Dan Dang's phone number?
- The practice phone number listed in the NPPES registry for Dan Dang is (408) 293-5900.
- Does Dan Dang accept Medicare?
- Dan Dang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dan Dang's NPI active?
- Yes — Dan Dang's NPI (1639351125) is active in the NPPES registry as of the last update on 2017-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.