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

Individual provider Addiction Medicine (Psychiatry & Neurology) Physician · NPI 1770784522

David Hallmark Ryan, MD practises Obstetrics/Gynecology in Greenville, North Carolina. Graduated from University of Virginia School of Medicine in 2007, 19 years ago. Practices with East Carolina University, a 498-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in North Carolina.

Years since qualifying
19
Trained at
University of Virginia School of Medicine
Licensed in
NC
In the registry since
2007
Specialties on file
3
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

905 Johns Hopkins Dr
Greenville, NC 27834-2056
Phone: (252) 744-1406
Fax: (252) 744-2419
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2160 Herbert Ct, Greenville, NC 27834-3736 — (252) 744-3850

Specialties & licences

Addiction Medicine (Psychiatry & Neurology) Physician (primary) Taxonomy 2084A0401X · Licence 2011-00331 (NC)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 2011-00331 (NC)
General Practice Physician Taxonomy 208D00000X · Licence 2011-00331 (NC)

Record details

NPI number1770784522
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 30, 2007
Last updated in NPPESMarch 5, 2024
Certification dateMarch 5, 2024

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolUNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice East Carolina University — 498 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients30
Services billed 66 a service is one billed item, such as a visit, a test or a procedure
Average patient age55

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at East Carolina University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 498 clinicians in the practice; 12 are shown here.

Other providers in Greenville