Walter Win Tun Ang, M.D
NPI 1558575696ActiveIndividual· Internal Medicine· Daytona Beach, FL
Internal Medicine (M.D) with Island Doctors Intrastate LLC and 1 other group, practicing in Daytona Beach, Florida. Mostly services rather than prescriptions: Medicare paid $52,943 for 355 patients in 2024, with only 42 Part D claims. Corcept Therapeutics was the largest of 3 companies reporting payments in 2025, $76.28 in all, mostly food and beverage.
Overview
| NPI | 1558575696 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | May 9, 2007 |
| Last updated in NPPES | Mar 6, 2025 |
| Certified by provider | Mar 6, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ME120678 | FL |
| Hospitalist | 208M00000X | ME120678 | FL |
| Internal Medicine | 207R00000X | A99942 | CA |
| Hospitalist | 208M00000X | A99942 | 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 - Hospitalist (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 355 |
|---|---|
| Services billed | 386 across 5 procedure codes |
| Paid by Medicare | $52,943 |
Part D prescriptions in 2024
| Prescriptions (claims) | 42 · 80 30-day fills |
|---|---|
| Patients | 18 |
| Total drug cost | $6,247 |
| Generic share | 74% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical groups
- Island Doctors Intrastate LLCHawthorne, FL · 72 clinicians
- Roy H Hinman MD PASaint Augustine, FL · 66 clinicians
Industry payments (Open Payments)
- 2025$76.28 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $30.37 | 1 |
| Abbott Laboratories | $25.34 | 1 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $20.57 | 1 |
What the 2025 payments were for
- Food and Beverage$76.28 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 63 internal medicine physicians in Daytona Beach · All internal medicine physicians in Florida