Mark O. Duncan, DO
NPI 1538155122ActiveIndividual· Neurological Surgery· Lawton, OK
Neurological Surgery (DO) in Lawton, Oklahoma, trained at Oklahoma State University College of Osteopathic Medicine (class of 1994). Mostly services rather than prescriptions: Medicare paid $51,113 for 166 patients in 2024, with only 35 Part D claims. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $85.98 in all, mostly food and beverage.
Overview
| NPI | 1538155122 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Sep 20, 2005 |
| Last updated in NPPES | Jul 10, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | 3848 | OK |
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 - Neurosurgery (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 166 |
|---|---|
| Services billed | 312 across 45 procedure codes |
| Paid by Medicare | $51,113 |
Part D prescriptions in 2024
| Prescriptions (claims) | 35 · 49 30-day fills |
|---|---|
| Patients | 24 |
| Total drug cost | $278.77 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Oklahoma State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Neurosurgery |
Medical group
- Comanche County Healthcare CorporationLawton, OK · 130 clinicians
Hospital affiliations
- Duncan Regional Hospital, IncDuncan, OK
- Jackson County Memorial Hospital AuthorityAltus, OK
- Memorial HealthLawton, OK
Industry payments (Open Payments)
- 2025$85.98 · 3 payments from 2 companies
- 2024$19.01 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $60.19 | 2 |
| Zimmer Biomet Holdings, Inc. | $25.79 | 1 |
What the 2025 payments were for
- Food and Beverage$85.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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