David Curt Chaffin, M.D.
NPI 1235178377ActiveIndividual· Allergy & Immunology· Chattanooga, TN
Allergy & Immunology (M.D.) in Chattanooga, Tennessee, trained at University of Tennessee, Hsc, College of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $118,898 for 851 claims, against $33,974 paid for services in 2024. Regeneron Healthcare Solutions, Inc. was the largest of 14 companies reporting payments in 2025, $1,314 in all, mostly food and beverage.
Overview
| NPI | 1235178377 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 5, 2006 |
| Last updated in NPPES | Apr 7, 2023 |
| Certified by provider | Apr 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | MD034259 | TN |
| Allergy & Immunology | 207K00000X | 57291 | GA |
| Pediatrics, Pediatric Allergy/Immunology | 2080P0201X | 034259 | TN |
| Pediatrics, Pediatric Allergy/Immunology | 2080P0201X | 57291 | GA |
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 - Allergy/Immunology (GA); Practitioner - Allergy/Immunology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 127 |
|---|---|
| Services billed | 3,777 across 26 procedure codes |
| Paid by Medicare | $33,974 |
Part D prescriptions in 2024
| Prescriptions (claims) | 851 · 1,733 30-day fills |
|---|---|
| Patients | 185 |
| Total drug cost | $118,898 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Galen Medical Group, PCChattanooga, TN · 125 clinicians
Industry payments (Open Payments)
- 2025$1,314 · 65 payments from 14 companies
- 2024$976.42 · 52 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $459.01 | 14 |
| Astrazeneca Pharmaceuticals LP | $227.14 | 25 |
| Genzyme Corporation | $205.16 | 7 |
| Novartis Pharmaceuticals Corporation | $146.38 | 6 |
| Ars Pharmaceuticals Operations, Inc. | $57.59 | 3 |
What the 2025 payments were for
- Food and Beverage$1,314 · 65 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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