Karl Tscha-Ning Sun, MD
NPI 1235131061ActiveIndividual· Internal Medicine, Cardiovascular Disease· La Mesa, CA
Internal Medicine, Cardiovascular Disease (MD) with Emergency and Acute Care Medical Corporation, practicing in La Mesa, California. In 2024 Medicare paid $283,238 for 384 patients, and Part D covered 2,009 of their prescriptions, 84% of them generic. Bayer Healthcare Pharmaceuticals Inc. was the largest of 16 companies reporting payments in 2025, $807.55 in all, mostly food and beverage. Lists Grossmont Hospital as a hospital affiliation.
Overview
| NPI | 1235131061 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 11, 2005 |
| Last updated in NPPES | Apr 23, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A68612 | CA |
| Nuclear Medicine, Nuclear Cardiology | 207UN0901X | A68612 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 384 |
|---|---|
| Services billed | 4,487 across 52 procedure codes |
| Paid by Medicare | $283,238 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,009 · 4,729 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $293,447 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1982 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Emergency and Acute Care Medical CorporationLa Mesa, CA · 422 clinicians
Hospital affiliation
- Grossmont HospitalLa Mesa, CA
Industry payments (Open Payments)
- 2025$807.55 · 31 payments from 16 companies
- 2024$451.10 · 26 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $200.00 | 1 |
| Novartis Pharmaceuticals Corporation | $178.19 | 12 |
| Amgen Inc. | $59.49 | 3 |
| Biotronik Inc. | $55.26 | 2 |
| Pfizer Inc. | $47.22 | 2 |
What the 2025 payments were for
- Food and Beverage$607.55 · 30 payments
- Consulting Fee$200.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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