Dr. Gregory A. Parker, MD
- Medicare services, 2024
- 53,375
- Medicare patients, 2024
- 4,076
- Part D claims, 2024
- 12,463
- MIPS score, 2024
- 95
- Hospital affiliations
- 3
- Practice address
- 106 Enterprise Ct, Columbus, GA 31904
- Practice phone
- Call (706) 321-0476
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Horizons Diagnostics
Columbus, Georgia
Find Dr. Parker's professional email, personal email and mobile number
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Dr. Gregory A. Parker is a family medicine physician in Columbus, Georgia
Dr. Parker practices at Horizons Diagnostics in Columbus, Georgia.
Dr. Parker's NPI, 1851392575, was assigned on August 3, 2005. Dr. Parker graduated from Medical College of Georgia School of Medicine in 1987. Dr. Parker holds Georgia license 031305.
- NPI
- 1851392575NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961578075
- NPI enumeration date
- August 3, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (706) 321-0476
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory A. Parker practices at Horizons Diagnostics in Columbus, Georgia
Dr. Parker's primary practice is Horizons Diagnostics, at 106 Enterprise Ct, Columbus, GA 31904 in Muscogee County. The practice phone is (706) 321-0476.
- Horizons Diagnostics106 Enterprise Ct, Columbus, GA 31904 · Muscogee CountyPhone(706) 321-0476
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory A. Parker is affiliated with 9 sites of care and 1 medical group
Dr. Parker's primary practice is Horizons Diagnostics in Columbus, Georgia. Dr. Parker is also affiliated with Piedmont Columbus Regional - Midtown. The medical group on file is Horizons Diagnostics, LLC. Dmand AI also links Dr. Parker to 2 more hospitals, 4 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory A. Parker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Parker practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Horizons Diagnostics | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory A. Parker is one of 3,495 family medicine physicians in Georgia
Family medicine is Dr. Parker's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Parker is licensed in Georgia.
Specialties and state licenses
- Family medicine, GeorgiaPrimary
Family medicine physicians near Dr. Parker
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Parker billed Medicare for 53,375 services in 2024
CMS data shows 53,375 Medicare services from Dr. Parker across 44 procedure codes in 2024, for 4,076 Medicare patients. Medicare paid $750,367 for them. Every service was in an office.
Dr. Parker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 45,3712024: 48,0586%
- Office and hospital visits
- 2023: 2,2762024: 2,3945%
- Other services
- 2023: 1,3032024: 1,3655%
- Surgery
- 2023: 7782024: 8226%
- Tests and treatments
- 2023: 2842024: 33719%
- Imaging
- 2023: 2472024: 28214%
- Drugs given in the office
- 2023: 1272024: 1178%
Dr. Parker compared with the Georgia median for family medicine physicians, 2024
- Dr. Parker
- Georgia median
- Medicare services
- 53,375vs 454117.6 times
- Medicare patients
- 4,076vs 16025.5 times
- Part D claims
- 11,725vs 97412.0 times
Medians across 3,374 family medicine physicians in Georgia with Dmand AI profiles that report each measure.
Dr. Parker's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Parker and other family medicine physicians in Georgia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Parker treated 4,076 Medicare patients in 2024, average age 75
CMS counts 4,076 Medicare patients who saw Dr. Parker in 2024. The largest group is 65 to 74, with 1,883 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 3% are also on Medicaid. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Parker's median patient age at 73, with 59% women.
Dr. Parker's Medicare patients by age, 2024
Dr. Parker's Medicare patients by sex, 2024
- Women2,40859%
- Men1,66841%
Chronic conditions among Dr. Parker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis41%
- Chronic kidney disease31%
- Diabetes29%
- Ischemic heart disease26%
- Anxiety23%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Parker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory A. Parker wrote 12,463 Medicare Part D claims in 2024
In 2024, Dr. Parker wrote 12,463 Medicare Part D claims for 857 patients. 87% of them were for generic drugs. CMS names the drug for 11,725 of them, across 174 drugs with 11 or more claims each, at $764,543 in total drug cost. In 2023, CMS named 10,511 claims across 158 drugs.
Dr. Parker's Part D claims by kind of drug, 2024
- Generic10,817 claims87%
- Brand-name1,593 claims13%
- Other53 claims0%
Dr. Parker's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Parker's Part D claims, 2024
- Opioids3%417 of 12,463 claims
- Antibiotics4%552 of 12,463 claims
- Antipsychotics, patients 65 and over0%34 of 12,463 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 10,5112024: 11,72512%
Drugs named by CMS: 174 in 2024, 158 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregory A. Parker scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Parker for performance year 2024, reported through an alternative payment model (APM). Dr. Parker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Parker's MIPS scores, performance year 2024
- 95of 100Final score
- 80.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory A. Parker received $14,678 in industry payments from 2016 to 2025
CMS Open Payments shows 998 general payments to Dr. Parker from 66 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Novo Nordisk Inc paid the most, $1,535.
General payments to Dr. Parker by program year, 2016 to 2025
General payments to Dr. Parker by kind, 2016 to 2025
- Food and beverage$14,52499%
- Education$1541%
Companies that paid Dr. Parker the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory A. Parker graduated from Medical College of Georgia School of Medicine
Dr. Parker graduated from Medical College of Georgia School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory A. Parker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory A. Parker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory A. Parker's NPI number?
Dr. Gregory A. Parker's NPI number is 1851392575. It was assigned on August 3, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory A. Parker?
Dr. Gregory A. Parker is a family medicine physician in Columbus, Georgia. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gregory A. Parker practice?
Dr. Parker practices at 106 Enterprise Ct, Columbus, GA 31904. Dr. Parker's primary practice is Horizons Diagnostics in Columbus, Georgia. Dmand AI also links Dr. Parker to 2 hospitals, 4 home health agencies and 1 group practice or clinic.
What is Dr. Gregory A. Parker's office phone number?
The practice phone on file for Dr. Parker is (706) 321-0476.
What is Dr. Gregory A. Parker's medical license number?
Dr. Parker holds Georgia license 031305.
Which hospitals is Dr. Gregory A. Parker affiliated with?
Dr. Parker is affiliated with Piedmont Columbus Regional - Midtown. Dmand AI links Dr. Parker to 2 more hospitals.
What medical group is Dr. Gregory A. Parker part of?
Dr. Parker is linked to Horizons Diagnostics, LLC.
Does Dr. Gregory A. Parker accept Medicare?
Yes. CMS data shows Dr. Parker billed Medicare for 53,375 services in 2024, and Dr. Parker accepts Medicare assignment.
What is Dr. Gregory A. Parker's MIPS score?
Dr. Parker's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Gregory A. Parker see?
CMS counts 4,076 Medicare patients who saw Dr. Parker in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Gregory A. Parker bill to Medicare?
In 2024, Dr. Parker's most billed Medicare services were lab and pathology test (80048), lab and pathology test (80061) and lab and pathology test (80076).
Where did Dr. Gregory A. Parker go to medical school?
Dr. Parker graduated from Medical College of Georgia School of Medicine in 1987.
What drugs does Dr. Gregory A. Parker prescribe most?
In 2024 Medicare Part D data, Dr. Parker's most prescribed drugs by claims were Levothyroxine Sodium, Amlodipine Besylate and Alprazolam.
Has Dr. Gregory A. Parker received payments from drug or device companies?
CMS Open Payments shows $14,678 in general payments to Dr. Parker from 66 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Gregory A. Parker been practicing?
Dr. Parker graduated from medical school in 1987, 39 years ago.
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