Istvan David Wollak, M.D.
NPI 1619919305ActiveIndividual· Internal Medicine, Pulmonary Disease· Southaven, MS
Internal Medicine, Pulmonary Disease (M.D.) with Memphis Lung Physicians Foundation, Inc. and 1 other group, practicing in Southaven, Mississippi. Their prescriptions cost Medicare Part D more than their services did: $3,467,059 for 1,157 claims, against $155,252 paid for services in 2024. Actelion Pharmaceuticals US, Inc. was the largest of 11 companies reporting payments in 2025, $718.40 in all, mostly food and beverage. Lists Baptist Memorial Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1619919305 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 10, 2006 |
| Last updated in NPPES | Jan 24, 2022 |
| Certified by provider | Jan 24, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 19168 | MS |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 19168 | MS |
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 - Pulmonary Disease (MS); Practitioner - Pulmonary Disease (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,014 |
|---|---|
| Services billed | 2,335 across 69 procedure codes |
| Paid by Medicare | $155,252 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,157 · 1,530 30-day fills |
|---|---|
| Patients | 212 |
| Total drug cost | $3,467,059 |
| Generic share | 43% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
Medical groups
- Memphis Lung Physicians Foundation, Inc.Germantown, TN · 58 clinicians
- Baptist Memorial Hospital-Desoto, Inc.Southaven, MS · 10 clinicians
Hospital affiliations
- Baptist Memorial HospitalMemphis, TN
- Baptist Memorial Hospital DesotoSouthaven, MS
- Baptist Memorial Hospital Union CountyNew Albany, MS
- Baptist Memorial Hospital-Crittenden, IncWest Memphis, AR
- Highland Hills Medical CenterSenatobia, MS
Industry payments (Open Payments)
- 2025$718.40 · 35 payments from 11 companies
- 2024$370.17 · 21 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Actelion Pharmaceuticals US, Inc. | $237.59 | 10 |
| Harmony Biosciences LLC | $107.40 | 3 |
| Glaxosmithkline, LLC. | $78.64 | 4 |
| Insmed, Inc. | $72.19 | 4 |
| Astrazeneca Pharmaceuticals LP | $71.28 | 3 |
What the 2025 payments were for
- Food and Beverage$618.41 · 34 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other pulmonologists in Southaven
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