Hennessey Tseng, M.D.
NPI 1003811746 · Cardiovascular Disease Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hennessey Tseng, M.D. is a Cardiovascular Disease Physician provider in Walnut Creek, CA (NPI 1003811746).
Provider details
- NPI number
- 1003811746
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G86069 (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
21 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
5,765 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 1,149 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 938 | $153 |
| Evaluation of Implantable Heart and Blood Vessel Monitoring System, Remote Up to 30 Days93297 | 421 | $77 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 382 | $18 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 368 | $214 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 60 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 508 | 175 |
| Rosuvastatin Calcium | 485 | 182 |
| Apixabanbrand: Eliquis | 439 | 139 |
| Atorvastatin Calcium | 279 | 97 |
| Carvedilol | 232 | 77 |
| Furosemide | 219 | 88 |
| Amlodipine Besylate | 203 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,303 across 120 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
- 2005-06-17
- Last updated
- 2015-08-11
Frequently asked questions
- What is Hennessey Tseng's NPI number?
- Hennessey Tseng's National Provider Identifier (NPI) is 1003811746, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hennessey Tseng's specialty?
- Hennessey Tseng is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Hennessey Tseng located?
- Hennessey Tseng's practice location on file with NPPES is 1450 Treat Blvd, Walnut Creek, CA 94597-2168.
- What is Hennessey Tseng's phone number?
- The practice phone number listed in the NPPES registry for Hennessey Tseng is (925) 937-1770.
- Does Hennessey Tseng accept Medicare?
- Hennessey Tseng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hennessey Tseng's NPI active?
- Yes — Hennessey Tseng's NPI (1003811746) is active in the NPPES registry as of the last update on 2015-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.