Nathaniel Ark Chin, M.D.
NPI 1902114754ActiveIndividual· Internal Medicine, Geriatric Medicine· Fitchburg, WI
Internal Medicine, Geriatric Medicine (M.D.) in Fitchburg, Wisconsin, trained at University of Wisconsin School of Medicine (class of 2010). 117 Medicare patients in 2024, $20,634 paid; nearly all of their 365 Part D prescriptions were generic (94%). Lilly USA, LLC was the largest of 2 companies reporting payments in 2025, $2,172 in all, mostly consulting fees.
Overview
| NPI | 1902114754 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 15, 2010 |
| Last updated in NPPES | Feb 10, 2021 |
| Certified by provider | Feb 10, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | 63774 | WI |
| Internal Medicine | 207R00000X | 63774-20 | WI |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Geriatric Medicine (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 117 |
|---|---|
| Services billed | 532 across 14 procedure codes |
| Paid by Medicare | $20,634 |
Part D prescriptions in 2024
| Prescriptions (claims) | 365 · 837 30-day fills |
|---|---|
| Patients | 104 |
| Total drug cost | $11,210 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Geriatric Medicine |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- University of Wisconsin Medical Foundation IncMadison, WI · 2,553 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$2,172 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $2,025 | 1 |
| Eisai Inc. | $147.14 | 2 |
What the 2025 payments were for
- Consulting Fee$2,025 · 1 payment
- Food and Beverage$147.14 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Geriatric Medicine providers in Fitchburg
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