Joan M. Duggan, M.D.
NPI 1891780300ActiveIndividual· Internal Medicine, Infectious Disease· Toledo, OH
Internal Medicine, Infectious Disease (M.D.) in Toledo, Ohio, trained at University of Toledo College of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $2,479,945 for 1,490 claims, against $7,953 paid for services in 2024. Theratechnologies Inc. reported $39.38 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1891780300 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 12, 2005 |
| Last updated in NPPES | Feb 5, 2026 |
| Certified by provider | Feb 5, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 35063775 | OH |
| Internal Medicine | 207R00000X | 35.063775 | OH |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Infectious Disease (MI); Practitioner - Infectious Disease (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 86 |
|---|---|
| Services billed | 151 across 7 procedure codes |
| Paid by Medicare | $7,953 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,490 · 1,780 30-day fills |
|---|---|
| Patients | 98 |
| Total drug cost | $2,479,945 |
Education and affiliations
| Medical school | University of Toledo College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
Medical group
- University of Toledo Physicians LLCToledo, OH · 403 clinicians
Hospital affiliations
- Promedica Toledo HospitalToledo, OH
- University of Toledo Medical CenterToledo, OH
Industry payments (Open Payments)
- 2025$39.38 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Theratechnologies Inc. | $39.38 | 1 |
What the 2025 payments were for
- Food and Beverage$39.38 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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