Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Emily E Ray Ko, MD

Individual provider Hospitalist Physician · NPI 1336342997

Dr. Emily E Ray Ko, MD is a Hospitalist in Durham, North Carolina. Graduated from Stanford University School of Medicine in 1997, 29 years ago. Practices with Duke University Health System, Inc, a 1,082-clinician group and accepts Medicare assignment. Licensed in North Carolina and Washington.

Years since qualifying
29
Trained at
Stanford University School of Medicine
Licensed in
NC, WA
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4103 Graceview Way
Durham, NC 27705-1684 Not confirmed with CMS for 14 years — call before visiting
Phone: (206) 240-3764
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence MD60166435 (WA)
Hospitalist Physician Taxonomy 208M00000X · Licence 2012-01967 (NC)

Record details

NPI number1336342997
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 8, 2007
Last updated in NPPESOctober 4, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolSTANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Duke University Health System, Inc — 1082 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients55
Services billed 139 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Education $26 1 payment · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Duke Regional Hospital Hospital · Durham, NC

Colleagues at Duke University Health System, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1082 clinicians in the practice; 12 are shown here.

Other providers in Durham