Daniel O. Claassen, M.D.
NPI 1821101411ActiveIndividual· Psychiatry & Neurology, Neurology· Nashville, TN
Psychiatry & Neurology, Neurology (M.D.) in Nashville, Tennessee, trained at Medical College of Georgia School of Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $476,469 for 139 claims, against $6,294 paid for services in 2024. Abbvie Inc. was the largest of 5 companies reporting payments in 2025, $41,719 in all, mostly consulting fees.
Overview
| NPI | 1821101411 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 16, 2006 |
| Last updated in NPPES | Mar 25, 2022 |
| Certified by provider | Mar 25, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 47418 | TN |
| Psychiatry & Neurology, Behavioral Neurology & Neuropsychiatry | 2084B0040X | 47418 | TN |
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 - Neurology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 52 |
|---|---|
| Services billed | 62 across 6 procedure codes |
| Paid by Medicare | $6,294 |
Part D prescriptions in 2024
| Prescriptions (claims) | 139 · 216 30-day fills |
|---|---|
| Patients | 35 |
| Total drug cost | $476,469 |
| Generic share | 51% of claims |
Education and affiliations
| Medical school | Medical College of Georgia School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical group
- Vanderbilt University Medical CenterNashville, TN · 3,567 clinicians
Hospital affiliation
- Vanderbilt University Medical CenterNashville, TN
Industry payments (Open Payments)
- 2025$41,719 · 36 payments from 5 companies
- 2024$71,341 · 50 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $16,268 | 18 |
| Neurocrine Biosciences, Inc. | $12,156 | 6 |
| Novartis Pharmaceuticals Corporation | $7,791 | 5 |
| Teva Pharmaceuticals USA, Inc. | $5,314 | 5 |
| Ptc Therapeutics, Inc. | $189.81 | 2 |
What the 2025 payments were for
- Consulting Fee$30,475 · 9 payments
- Travel and Lodging$10,054 · 9 payments
- Food and Beverage$1,190 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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