Dr. Gregory T. Koo, MD
- Medicare services, 2022
- 60
- Part D claims, 2026
- 8,310
- Industry payments
- $1,378
- Affiliated sites
- 2
- Medical groups
- 3
- Practice address
- 1401 Harrodsburg Rd, Lexington, KY 40504
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Healthfirst Bluegrass, Inc. - HOPD
Acute Care Hospital outpatient department · Lexington, Kentucky
Find Dr. Koo's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory T. Koo is a general practice physician in Lexington, Kentucky
Dr. Koo practices at Healthfirst Bluegrass, Inc. - HOPD in Lexington, Kentucky.
Dr. Koo's NPI, 1205895943, was assigned on March 21, 2006. Dr. Koo graduated from University of Cincinnati College of Medicine in 1996. Dr. Koo holds Kentucky license 33614.
- NPI
- 1205895943NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547238107
- NPI enumeration date
- March 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory T. Koo practices at Healthfirst Bluegrass, Inc. - HOPD in Lexington, Kentucky
Dr. Koo's primary practice is Healthfirst Bluegrass, Inc. - HOPD, at 1401 Harrodsburg Rd, Lexington, KY 40504.
- Healthfirst Bluegrass, Inc. - HOPD1401 Harrodsburg Rd, Lexington, KY 40504
Source: Dmand AI Affiliation Data
Dr. Gregory T. Koo is affiliated with 2 sites of care and 3 medical groups
Dr. Koo's primary practice is Healthfirst Bluegrass, Inc. - HOPD in Lexington, Kentucky. The medical group on file is HealthFirst Bluegrass Inc. Dmand AI also links Dr. Koo to 2 more medical groups and 1 community health center, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory T. Koo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koo practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Healthfirst Bluegrass, Inc. - HOPD | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory T. Koo is one of 94 general practice physicians in Kentucky
General practice is Dr. Koo's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Koo is licensed in Kentucky.
Specialties and state licenses
- General practice, KentuckyPrimary
General practice physicians near Dr. Koo
Counts of general practice 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 T. Koo billed Medicare for 60 services in 2022
CMS data shows 60 Medicare services from Dr. Koo across 2 procedure codes in 2022, all of them office visits. Medicare paid $3,239 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Koo's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 552022: 609%
Dr. Koo compared with the Kentucky median for general practice physicians, 2022
- Dr. Koo
- Kentucky median
- Medicare services
- 60vs 17866% below
- Part D claims
- 7,616vs 13357.3 times
Medians across 76 general practice physicians in Kentucky with Dmand AI profiles that report each measure.
Dr. Koo's most billed Medicare procedure codes, 2022
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory T. Koo's patients have a median age of 48
Across all payers, Dmand AI patient panel data puts Dr. Koo's median patient age at 48, with 58% women.
Dr. Koo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women58%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Gregory T. Koo wrote 8,310 Medicare Part D claims in 2026
In 2026, Dr. Koo wrote 8,310 Medicare Part D claims for 493 patients. 88% of them were for generic drugs. CMS names the drug for 7,616 of them, across 138 drugs with 11 or more claims each, at $454,763 in total drug cost. In 2023, CMS named 7,606 claims across 140 drugs.
Dr. Koo's Part D claims by kind of drug, 2026
- Generic7,329 claims88%
- Brand-name927 claims11%
- Other54 claims1%
Dr. Koo'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. Koo's Part D claims, 2026
- Opioids0%30 of 8,310 claims
- Antibiotics4%292 of 8,310 claims
- Antipsychotics, patients 65 and over1%90 of 8,310 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: 7,6062024: 7,616No change
Drugs named by CMS: 138 in 2024, 140 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), 2026 data
Dr. Gregory T. Koo offers telehealth to Medicare patients
Dr. Koo accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Koo as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory T. Koo received $1,378 in industry payments from 2016 to 2024
CMS Open Payments shows 90 general payments to Dr. Koo from 22 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 99% of the total. Merck Sharp & Dohme Corporation paid the most, $243.
General payments to Dr. Koo by program year, 2016 to 2024
General payments to Dr. Koo by kind, 2016 to 2024
- Food and beverage$1,36699%
- Education$121%
Companies that paid Dr. Koo the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory T. Koo graduated from University of Cincinnati College of Medicine
Dr. Koo graduated from University of Cincinnati College of Medicine in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory T. Koo'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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 Data |
| 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) |
| 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 T. Koo
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 T. Koo's NPI number?
Dr. Gregory T. Koo's NPI number is 1205895943. It was assigned on March 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory T. Koo?
Dr. Gregory T. Koo is a general practice physician in Lexington, Kentucky. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Gregory T. Koo practice?
Dr. Koo practices at 1401 Harrodsburg Rd, Lexington, KY 40504. Dr. Koo's primary practice is Healthfirst Bluegrass, Inc. - HOPD in Lexington, Kentucky. Dmand AI also links Dr. Koo to 2 medical groups and 1 community health center, and a free account names each one.
What is Dr. Gregory T. Koo's email address?
Dmand AI checks professional and personal email addresses for Dr. Koo through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Gregory T. Koo's medical license number?
Dr. Koo holds Kentucky license 33614.
What medical group is Dr. Gregory T. Koo part of?
Dr. Koo is linked to HealthFirst Bluegrass Inc. Dmand AI links Dr. Koo to 2 more medical groups, named with a free account.
Who does Dr. Gregory T. Koo practice with?
Dmand AI links 73 HCPs to Dr. Koo's primary medical group, 1 of them general practice physician. A free account lists them, with verified contacts.
Does Dr. Gregory T. Koo accept Medicare?
Yes. CMS data shows Dr. Koo billed Medicare for 60 services in 2022, and Dr. Koo accepts Medicare assignment.
Does Dr. Gregory T. Koo offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Koo as offering telehealth services.
What services does Dr. Gregory T. Koo bill to Medicare?
In 2022, Dr. Koo's most billed Medicare services were office visit, established patient (99214) and office visit, established patient (99213).
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Where did Dr. Gregory T. Koo go to medical school?
Dr. Koo graduated from University of Cincinnati College of Medicine in 1996.
What drugs does Dr. Gregory T. Koo prescribe most?
In 2024 Medicare Part D data, Dr. Koo's most prescribed drugs by claims were Omega-3 Acid Ethyl Esters, Atorvastatin Calcium and Amlodipine Besylate.
Has Dr. Gregory T. Koo received payments from drug or device companies?
CMS Open Payments shows $1,378 in general payments to Dr. Koo from 22 companies from 2016 to 2024. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Gregory T. Koo been practicing?
Dr. Koo graduated from medical school in 1996, 30 years ago.
What EHR does Dr. Gregory T. Koo's practice use?
Dmand AI tracks the EHR system at Healthfirst Bluegrass, Inc. - HOPD and at 1 more site and 2 medical groups. The vendor and product are available with a free Dmand AI account.
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