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

Gregory A Parker, MD

Individual provider Family Medicine Physician · NPI 1851392575

Gregory A Parker, MD is registered under Family Practice in Columbus, Georgia. Graduated from Medical College of Georgia School of Medicine in 1987, 39 years ago. Practices with Horizons Diagnostics, LLC, a 24-clinician group and accepts Medicare assignment. Licensed in Georgia.

Years since qualifying
39
Trained at
Medical College of Georgia School of Medicine
Licensed in
GA
In the registry since
2005
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

3934 Woodruff Rd
Columbus, GA 31904-6818 Not confirmed with CMS for 14 years — call before visiting
Phone: (706) 322-0304
Fax: (706) 327-0870
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 031305 (GA)

Record details

NPI number1851392575
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 3, 2005
Last updated in NPPESFebruary 15, 2012

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolMEDICAL COLLEGE OF GEORGIA SCHOOL OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice Horizons Diagnostics, L.L.C. — 24 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 patients4,076
Services billed 59,075 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.

Food and Beverage $1,799 108 payments · a meal or drink at a meeting or visit, 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. Those with a page here are linked.

  • Piedmont Columbus Regional Northside Hospital · Columbus, GA · listed as Hughston Hospital, Inc
  • Piedmont Columbus Regional Midtown Hospital · Columbus, GA
  • St Francis Hospital- Emory Healthcare Hospital · Columbus, GA
  • Amedisys Home Health Of Macon Home health agency · Macon, GA
  • Centerwell Home Health Home health agency · Columbus, GA
  • Enhabit Home Health Home health agency · Columbus, GA
  • Prohealth Home Health-Georgia, Llc Home health agency · Columbus, GA

Colleagues at Horizons Diagnostics, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 24 clinicians in the practice; 12 are shown here.

Other providers in Columbus