Nicholas Callahan, MPH DMD MD
NPI 1083920227ActiveIndividual· Oral & Maxillofacial Surgery· Chicago, IL
Oral & Maxillofacial Surgery (MPH DMD MD) in Chicago, Illinois, trained at State University of New York Downstate Medical Center (class of 2013). Medicare paid $27,982 for services to 79 patients in 2024. Kls-Martin L.P. was the largest of 4 companies reporting payments in 2025, $2,614 in all, mostly honoraria.
Overview
| NPI | 1083920227 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MPH DMD MD |
| Sole proprietor | No |
| NPI issued | Aug 25, 2010 |
| Last updated in NPPES | Aug 25, 2026 |
| Certified by provider | Aug 25, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Oral & Maxillofacial Surgery Primary | 204E00000X | 036147058 | IL |
| Dentist, Oral and Maxillofacial Surgery | 1223S0112X | 021102880 | IL |
| Oral & Maxillofacial Surgery | 204E00000X | 019031599 | IL |
| Dentist, Orthodontics and Dentofacial Orthopedics | 1223X0400X | 021002880 | IL |
| Dentist, Oral and Maxillofacial Surgery | 1223S0112X | 036147058 | IL |
| Dentist, Orthodontics and Dentofacial Orthopedics | 1223X0400X | 036147058 | IL |
| Oral & Maxillofacial Surgery | 204E00000X | 021002880 | IL |
| Dentist, Oral and Maxillofacial Surgery | 1223S0112X | 019031599 | IL |
| Dentist, Orthodontics and Dentofacial Orthopedics | 1223X0400X | 019031599 | IL |
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 - Maxillofacial Surgery (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 79 |
|---|---|
| Services billed | 168 across 44 procedure codes |
| Paid by Medicare | $27,982 |
Education and affiliations
| Medical school | State University of New York Downstate Medical Center |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Maxillofacial Surgery |
Medical group
- The Board of Trustees of the University of IllinoisChicago, IL · 1,150 clinicians
Hospital affiliation
- University of Illinois Hospital and ClinicsChicago, IL
Industry payments (Open Payments)
- 2025$2,614 · 8 payments from 4 companies
- 2024$389.88 · 6 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Kls-Martin L.P. | $2,296 | 4 |
| Acera Surgical, Inc. | $158.06 | 1 |
| Axogen | $140.19 | 2 |
| Aroa Biosurgery Incorporated | $20.30 | 1 |
What the 2025 payments were for
- Honoraria$2,000 · 1 payment
- Food and Beverage$614.19 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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