John Lien, MD
NPI 1932291648 · Cardiovascular Disease Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Lien, MD is a Cardiovascular Disease Physician provider in San Jose, CA (NPI 1932291648).
Provider details
- NPI number
- 1932291648
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0G63910 (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
2,589 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 | 1,096 | $155 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 291 | $18 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 242 | $258 |
| Rubidium Rb-82, Diagnostic, Per Study Dose, Up to 60 MillicuriesA9555 | 234 | $512 |
| Exercise Or Drug-Induced Heart Stress Test With Electrocardiogram (ecg) With Supervision and Review By Physician93015 | 154 | $88 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 830 | 303 |
| Apixabanbrand: Eliquis | 730 | 163 |
| Rosuvastatin Calcium | 620 | 246 |
| Atorvastatin Calcium | 579 | 188 |
| Amlodipine Besylate | 462 | 178 |
| Olmesartan Medoxomil | 406 | 174 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,688 across 57 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
- 2006-09-29
- Last updated
- 2009-04-10
Frequently asked questions
- What is John Lien's NPI number?
- John Lien's National Provider Identifier (NPI) is 1932291648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Lien's specialty?
- John Lien is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Lien located?
- John Lien's practice location on file with NPPES is 200 Jose Figueres Ave, San Jose, CA 95116-1590.
- What is John Lien's phone number?
- The practice phone number listed in the NPPES registry for John Lien is (408) 251-7900.
- Does John Lien accept Medicare?
- John Lien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Lien's NPI active?
- Yes — John Lien's NPI (1932291648) is active in the NPPES registry as of the last update on 2009-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.