Nathan Claydon, MD
NPI 1023453271ActiveIndividual· Internal Medicine· Chattanooga, TN
Internal Medicine (MD) with Dignity Health Medical Foundation, practicing in Chattanooga, Tennessee. 402 Medicare patients in 2024, $124,582 paid; nearly all of their 150 Part D prescriptions were generic (90%). Abbott Laboratories was the largest of 2 companies reporting payments in 2025, $57.34 in all, mostly food and beverage. Lists Mercy General Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1023453271 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 1, 2013 |
| Last updated in NPPES | Mar 19, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 142159 | CA |
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 - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 402 |
|---|---|
| Services billed | 1,277 across 21 procedure codes |
| Paid by Medicare | $124,582 |
Part D prescriptions in 2024
| Prescriptions (claims) | 150 · 151 30-day fills |
|---|---|
| Patients | 71 |
| Total drug cost | $6,540 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical group
- Dignity Health Medical FoundationFolsom, CA · 1,184 clinicians
Hospital affiliations
- Mercy General HospitalSacramento, CA
- Mercy San Juan Medical CenterCarmichael, CA
- Sierra Nevada Memorial HospitalGrass Valley, CA
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2025$57.34 · 3 payments from 2 companies
- 2024$569.53 · 13 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $40.15 | 2 |
| Abbvie Inc. | $17.19 | 1 |
What the 2025 payments were for
- Food and Beverage$57.34 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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