Kai M. Sun, D.O.
NPI 1023286317ActiveIndividual· Internal Medicine, Cardiovascular Disease· San Angelo, TX
Internal Medicine, Cardiovascular Disease (D.O.) in San Angelo, Texas, trained at University of North Texas Hsc, College of Osteopathic Med (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $1,123,271 for 8,124 claims, against $297,920 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 10 companies reporting payments in 2025, $669.62 in all, mostly food and beverage.
Overview
| NPI | 1023286317 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Feb 20, 2008 |
| Last updated in NPPES | Sep 8, 2020 |
| Certified by provider | Sep 8, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | M9037 | TX |
| Internal Medicine | 207R00000X | M9037 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,236 |
|---|---|
| Services billed | 3,864 across 83 procedure codes |
| Paid by Medicare | $297,920 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,124 · 18,035 30-day fills |
|---|---|
| Patients | 1,144 |
| Total drug cost | $1,123,271 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | University of North Texas Hsc, College of Osteopathic Med |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical group
- Shannon ClinicSan Angelo, TX · 559 clinicians
Hospital affiliations
- Ballinger Memorial HospitalBallinger, TX
- Lillian M Hudspeth Memorial HospitalSonora, TX
- Reagan Memorial HospitalBig Lake, TX
- Schleicher County Medical CenterEldorado, TX
- Shannon Medical CenterSan Angelo, TX
Industry payments (Open Payments)
- 2025$669.62 · 24 payments from 10 companies
- 2024$450.41 · 21 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $154.11 | 3 |
| Penumbra, Inc. | $123.33 | 1 |
| Novartis Pharmaceuticals Corporation | $107.02 | 5 |
| E.R. Squibb & Sons, L.L.C. | $61.74 | 3 |
| Novo Nordisk Inc | $54.49 | 3 |
What the 2025 payments were for
- Food and Beverage$669.62 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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