Emily E. Ray Ko, M.D.
NPI 1336342997ActiveIndividual· Hospitalist· Durham, NC
Hospitalist (M.D.) in Durham, North Carolina, trained at Stanford University School of Medicine (class of 1997). 55 Medicare patients in 2024, $10,603 paid; nearly all of their 64 Part D prescriptions were generic (95%). Merck Sharp & Dohme LLC reported $25.70 in payments in 2025, mostly education.
Overview
| NPI | 1336342997 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 8, 2007 |
| Last updated in NPPES | Oct 4, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | MD60166435 | WA |
| Hospitalist | 208M00000X | 2012-01967 | NC |
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 - Hospitalist (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 55 |
|---|---|
| Services billed | 139 across 6 procedure codes |
| Paid by Medicare | $10,603 |
Part D prescriptions in 2024
| Prescriptions (claims) | 64 · 68 30-day fills |
|---|---|
| Patients | 21 |
| Total drug cost | $1,646 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | Stanford University School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical group
- Duke University Health System, IncDurham, NC · 1,102 clinicians
Hospital affiliation
- Duke Regional HospitalDurham, NC
Industry payments (Open Payments)
- 2025$25.70 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $25.70 | 1 |
What the 2025 payments were for
- Education$25.70 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 56 hospitalists in Durham · All hospitalists in North Carolina