Guy Chadwick Asher Jr., M.D.
NPI 1396731212ActiveIndividual· Internal Medicine, Nephrology· Fort Wayne, IN
Internal Medicine, Nephrology (M.D.) in Fort Wayne, Indiana, trained at Indiana University School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $476,775 for 2,240 claims, against $154,404 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 9 companies reporting payments in 2025, $349.40 in all, mostly food and beverage.
Overview
| NPI | 1396731212 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 26, 2005 |
| Last updated in NPPES | Apr 28, 2025 |
| Certified by provider | Apr 28, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 01064470A | IN |
| Internal Medicine, Nephrology | 207RN0300X | 35.076178 | 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 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 - Nephrology (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 487 |
|---|---|
| Services billed | 1,830 across 37 procedure codes |
| Paid by Medicare | $154,404 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,240 · 5,347 30-day fills |
|---|---|
| Patients | 340 |
| Total drug cost | $476,775 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Nephrology |
Medical group
- Nephrology Associates of Northern Indiana PCVan Wert, OH · 65 clinicians
Hospital affiliation
- Parkview Regional Medical CenterFort Wayne, IN
Industry payments (Open Payments)
- 2025$349.40 · 19 payments from 9 companies
- 2024$628.50 · 44 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $76.48 | 3 |
| Fresenius USA Marketing, Inc. | $75.62 | 4 |
| Bayer Healthcare Pharmaceuticals Inc. | $41.37 | 2 |
| Astrazeneca Pharmaceuticals LP | $38.31 | 2 |
| Amgen Inc. | $29.76 | 2 |
What the 2025 payments were for
- Food and Beverage$343.84 · 17 payments
- Education$5.56 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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