John Gregory Markley, M.D.
NPI 1932190980ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Columbia, MO
Thoracic Surgery (Cardiothoracic Vascular Surgery) (M.D.) in Columbia, Missouri, trained at Medical College of Wisconsin (class of 1992). Mostly services rather than prescriptions: Medicare paid $92,809 for 104 patients in 2024, with only 17 Part D claims. Edwards Lifesciences Corporation was the largest of 10 companies reporting payments in 2025, $3,602 in all, mostly travel and lodging.
Overview
| NPI | 1932190980 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 31, 2005 |
| Last updated in NPPES | Mar 29, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | 2002023140 | MO |
| Surgery | 208600000X | G85299 | CA |
| Surgery | 208600000X | 34541-020 | WI |
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 - Cardiac Surgery (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 104 |
|---|---|
| Services billed | 214 across 57 procedure codes |
| Paid by Medicare | $92,809 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17 · 21 30-day fills |
|---|---|
| Total drug cost | $248.09 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Cardiac Surgery |
| Secondary specialties | Thoracic Surgery |
Medical group
- The Curators of the University of MissouriColumbia, MO · 1,131 clinicians
Hospital affiliations
- Lake Regional Health SystemOsage Beach, MO
- University of Missouri Health CareColumbia, MO
Other facilities
- Centerwell Home HealthHome health agency · Columbia, MO
Industry payments (Open Payments)
- 2025$3,602 · 21 payments from 10 companies
- 2024$1,945 · 24 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Edwards Lifesciences Corporation | $1,594 | 8 |
| Artivion, Inc. | $1,384 | 2 |
| Abiomed | $271.89 | 3 |
| Atricure, Inc. | $136.92 | 2 |
| Abbott Laboratories | $60.00 | 1 |
What the 2025 payments were for
- Travel and Lodging$2,491 · 4 payments
- Food and Beverage$1,111 · 17 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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