John S. Ferguson, MD
NPI 1205823317ActiveIndividual· Internal Medicine, Pulmonary Disease· Madison, WI
Internal Medicine, Pulmonary Disease (MD) in Madison, Wisconsin, trained at University of Texas Medical Branch at Galveston (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $95,592 for 206 claims, against $41,100 paid for services in 2024. Intuitive Surgical, Inc. was the largest of 2 companies reporting payments in 2025, $1,281 in all, mostly travel and lodging.
Overview
| NPI | 1205823317 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 4, 2005 |
| Last updated in NPPES | Jan 29, 2021 |
| Certified by provider | Jan 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 52109 | WI |
| Internal Medicine | 207R00000X | 52109 | WI |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 52109 | WI |
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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 355 |
|---|---|
| Services billed | 839 across 47 procedure codes |
| Paid by Medicare | $41,100 |
Part D prescriptions in 2024
| Prescriptions (claims) | 206 · 300 30-day fills |
|---|---|
| Patients | 45 |
| Total drug cost | $95,592 |
| Generic share | 20% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Pulmonary Disease |
| Telehealth | Offers telehealth |
Medical group
- University of Wisconsin Medical Foundation IncMadison, WI · 2,553 clinicians
Hospital affiliations
- Unitypoint Health - MeriterMadison, WI
- University of Wi Hospitals & Clinics AuthorityMadison, WI
- Uw HealthRockford, IL
Industry payments (Open Payments)
- 2025$1,281 · 6 payments from 2 companies
- 2024$13,505 · 10 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,148 | 3 |
| Olympus America Inc. | $133.45 | 3 |
What the 2025 payments were for
- Travel and Lodging$757.05 · 2 payments
- Food and Beverage$524.13 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 75 pulmonologists in Madison · All pulmonologists in Wisconsin