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

Dr. Eric Mark Greenfield, DO

Individual provider Emergency Medicine Physician · NPI 1457558025

Dr. Eric Mark Greenfield, DO practises Emergency Medicine in Tamuning, Guam. Graduated from Ohio Medical University in 2007, 19 years ago. Practices with Middle Tennessee Emergency Physicians, PC, a 86-clinician group and accepts Medicare assignment. Licensed in Georgia and Guam.

Years since qualifying
19
Trained at
Ohio Medical University
Licensed in
GA, GU
In the registry since
2007
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address may be wrong

The ZIP code does not match the city and state on this record. Call before visiting.

850 Gov Carlos G Camacho Rd
Tamuning, GU 96913-3128 Not confirmed with CMS for 10 years — call before visiting
Phone: (671) 988-7814

No coordinates on file. Search this address in Google Maps

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence RTP002364 (GA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence DO0064 (GU)

Record details

NPI number1457558025
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 28, 2007
Last updated in NPPESMay 16, 2016

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOHIO MEDICAL UNIVERSITY
Graduated 2007 (19 years in practice)
Group practice Middle Tennessee Emergency Physicians, P.C. — 86 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 patients140
Services billed 233 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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. Those with a page here are linked.

Colleagues at Middle Tennessee Emergency Physicians, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 86 clinicians in the practice; 12 are shown here.

Other providers in Tamuning