Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Gregory A Gerlock, MD

Individual provider Emergency Medicine Physician · NPI 1114987740

Dr. Gregory A Gerlock, MD practises Emergency Medicine in Bristol, Tennessee. Graduated from Medical College of Georgia School of Medicine in 1989, 37 years ago. Practices with Tri-Cities Regional Emergency Physicians, PC, a 118-clinician group and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
37
Trained at
Medical College of Georgia School of Medicine
Licensed in
TN
In the registry since
2006
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

1 Medical Park Blvd
Bristol, TN 37620-7430
Phone: (423) 844-2100
Fax: (423) 844-2120
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 20852 (TN)

Record details

NPI number1114987740
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 27, 2006
Last updated in NPPESJuly 7, 2021
Certification dateJuly 7, 2021

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolMEDICAL COLLEGE OF GEORGIA SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Tri-Cities Regional Emergency Physicians, Pc — 118 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 patients104
Services billed 152 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Tri-Cities Regional Emergency Physicians, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 118 clinicians in the practice; 12 are shown here.

Other providers in Bristol