Christopher A. Chaffin, PA
NPI 1104129436ActiveIndividual· Physician Assistant· Springfield, MO
Physician Assistant (PA) with Mercy Clinic Springfield Communities, practicing in Springfield, Missouri. 129 Medicare patients in 2024, $13,509 paid; nearly all of their 386 Part D prescriptions were generic (94%). Lilly USA, LLC was the largest of 2 companies reporting payments in 2025, $72.31 in all, mostly food and beverage. Lists Mercy Hospital Springfield as a hospital affiliation.
Overview
| NPI | 1104129436 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Dec 8, 2010 |
| Last updated in NPPES | Feb 3, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 2011001602 | MO |
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 - Physician Assistant (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 129 |
|---|---|
| Services billed | 180 across 34 procedure codes |
| Paid by Medicare | $13,509 |
Part D prescriptions in 2024
| Prescriptions (claims) | 386 · 490 30-day fills |
|---|---|
| Patients | 142 |
| Total drug cost | $18,939 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Mercy Clinic Springfield CommunitiesLebanon, MO · 1,120 clinicians
Hospital affiliation
- Mercy Hospital SpringfieldSpringfield, MO
Industry payments (Open Payments)
- 2025$72.31 · 4 payments from 2 companies
- 2024$816.79 · 20 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $49.89 | 3 |
| Vertex Pharmaceuticals Incorporated | $22.42 | 1 |
What the 2025 payments were for
- Food and Beverage$72.31 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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