Mark David Ewalt, M.D.
NPI 1497998512ActiveIndividual· Pathology, Molecular Genetic Pathology· New York, NY
Pathology, Molecular Genetic Pathology (M.D.) in New York, New York, trained at Columbia University College of Physicians and Surgeons (class of 2009). Medicare paid $41,938 for services to 858 patients in 2024. Pillar Biosciences, Inc was the largest of 3 companies reporting payments in 2025, $27,228 in all, mostly consulting fees.
Overview
| NPI | 1497998512 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 20, 2009 |
| Last updated in NPPES | Aug 25, 2021 |
| Certified by provider | Aug 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pathology, Molecular Genetic Pathology Primary | 207ZP0007X | DR.0058760 | CO |
| Pathology, Cytopathology | 207ZC0500X | DR.0058760 | CO |
| Pathology, Hematology | 207ZH0000X | A121762 | CA |
| Pathology, Hematology | 207ZH0000X | DR.0058760 | CO |
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 - Pathology (CA); Practitioner - Pathology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 858 |
|---|---|
| Services billed | 1,082 across 4 procedure codes |
| Paid by Medicare | $41,938 |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Pathology |
Medical group
- Memorial Pathology GroupNew York, NY · 99 clinicians
Hospital affiliations
- NYU Langone HospitalsNew York, NY
- Riverview Medical CenterRed Bank, NJ
Industry payments (Open Payments)
- 2025$27,228 · 10 payments from 3 companies
- 2024$2,126 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pillar Biosciences, Inc | $19,224 | 5 |
| Illumina, Inc. | $7,857 | 4 |
| Janssen Biotech, Inc. | $146.90 | 1 |
What the 2025 payments were for
- Consulting Fee$22,031 · 4 payments
- Travel and Lodging$4,915 · 4 payments
- Food and Beverage$282.88 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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