Dr. Gregory T Koo , MD
General Practice โข Lexington, KY
1401 Harrodsburg Rd Ste B165
Lexington, KY 405041726
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on March 21, 2006; this date does not establish years in practice.
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Published CMS data list 60 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 99214 โ Established patient outpatient office visit: 45 service units.
- 99213 โ Established patient outpatient office visit: 15 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 7,616 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Omega-3 Acid Ethyl Esters โ 496 prescription fills, including refills.
- Atorvastatin Calcium โ 304 prescription fills, including refills.
- Lisinopril โ 252 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 138 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 80% of clinicians listed under General Practice in Kentucky (2024, 39 clinicians with data). Median for this group: 878. Middle half: 126 to 5,339.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 43 in 2018 to 60 in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2018โ2022.
Practice Location & Contact Primary Location
1401 Harrodsburg Rd Ste B165
Lexington, KY 405041726
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Lexington, KY. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Healthfirst Bluegrass Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Cincinnati College Of Medicine
1996
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $5,191 in 2022
The total amount Medicare approved for these services in 2022. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022.
Paid by Medicare
About $3,239 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022.
30-day fills
13,270 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$454,763 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2024
All general payments: $167.38 across 9 records.
By nature of payment
- Food and Beverage: $167.38 across 9 records.
Reporting-company totals (3 largest of 7)
- ABBVIE INC.: $31.38 across 1 record.
- Eli Lilly and Company: $29.28 across 2 records.
- GlaxoSmithKline, LLC.: $27.20 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).
Years since graduation
30 years (graduated 1996)
CMS Doctors and Clinicians data list 1996 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Koo has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Koo as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Lexington and Kentucky
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under General Practice in Kentucky (2024, 39 clinicians with data). Median for this group: 878. Middle half: 126 to 5,339.
Too few clinicians listed under General Practice in Lexington have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under General Practice in Kentucky (2024, 39 clinicians with data). Median for this group: $28,721. Middle half: $1,130 to $361,735.
Too few clinicians listed under General Practice in Lexington have Medicare Part D data for 2024 to compare.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Koo are from 2022.
13 active clinicians are listed under General Practice with a practice address in Lexington, KY (122 in Kentucky).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Lexington
7.7% of these 13 clinicians have the CMS telehealth indicator.
38.5% of these 13 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 40% from 43 in 2018 to 60 in 2022.
- 2018: 43
- 2019: 233
- 2020: 209
- 2021: 55
- 2022: 60
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Medicare-allowed amount
Medicare-allowed amount increased 22% from $4,260 in 2018 to $5,191 in 2022.
- 2018: $4,260
- 2019: $19,482
- 2020: $13,694
- 2021: $4,656
- 2022: $5,191
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Paid by Medicare
Paid by Medicare varied from year to year: $3,202 in 2018 and $3,239 in 2022.
- 2018: $3,202
- 2019: $11,804
- 2020: $9,242
- 2021: $3,413
- 2022: $3,239
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 2544% from 288 in 2020 to 7,616 in 2024.
- 2020: 288
- 2021: 2,124
- 2022: 5,067
- 2023: 7,606
- 2024: 7,616
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30-day fills
30-day fills increased 3099% from 415 in 2020 to 13,270 in 2024.
- 2020: 415
- 2021: 3,534
- 2022: 8,976
- 2023: 13,227
- 2024: 13,270
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Part D drug cost
Part D drug cost increased 13567% from $3,328 in 2020 to $454,763 in 2024.
- 2020: $3,328
- 2021: $99,084
- 2022: $289,750
- 2023: $620,461
- 2024: $454,763
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $296.64 in 2020 to $167.38 in 2024.
- 2020: $296.64
- 2021: $387.73
- 2022: $240.01
- 2023: $252.94
- 2024: $167.38
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 โ December 31, 2024): fewer than 11 records totaling $167.38.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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VRAYLAR | General | $31.38 |
| Ultragenyx Pharmaceutical Inc. |
Food and Beverage
In-kind items and services
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Crysvita | General | $20.84 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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Otezla | General | $20.66 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $19.01 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
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Korlym | General | $19.01 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $16.03 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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TRELEGY ELLIPTA | General | $13.66 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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AREXVY | General | $13.54 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $13.25 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017โ2021 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2018โ2022; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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45 | 28 | $150.00 | $94.01 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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15 | 12 | $98.00 | $64.02 |
Source: CMS Part B by Provider and Service, 2022; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Omega-3 Acid Ethyl Esters | Omega-3 Acid Ethyl Esters | 496 | 24,207 | $18,948.06 | 134 |
| Atorvastatin Calcium | Atorvastatin Calcium | 304 | 20,314 | $1,912.38 | 91 |
| Lisinopril | Lisinopril | 252 | 16,170 | $958.60 | 67 |
| Amlodipine Besylate | Amlodipine Besylate | 252 | 16,030 | $783.65 | 68 |
| Omeprazole | Omeprazole | 244 | 15,195 | $2,085.94 | 67 |
| Potassium Chloride | Potassium Chloride | 230 | 12,101 | $2,749.39 | 55 |
| Levothyroxine Sodium | Levothyroxine Sodium | 229 | 14,405 | $1,994.50 | 62 |
| Losartan Potassium | Losartan Potassium | 169 | 11,812 | $969.31 | 47 |
| Mirtazapine | Mirtazapine | 168 | 7,730 | $1,102.89 | 42 |
| Meloxicam | Meloxicam | 161 | 7,213 | $428.76 | 38 |
| Furosemide | Furosemide | 157 | 8,025 | $318.02 | 40 |
| Pantoprazole Sodium | Pantoprazole Sodium | 152 | 10,020 | $1,730.19 | 50 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 149 | 9,120 | $860.15 | 36 |
| Fluticasone Propionate | Fluticasone Propionate | 146 | 5,880 | $1,020.90 | 51 |
| Metformin Hcl | Metformin Hcl | 146 | 8,985 | $554.73 | 41 |
| Ozempic | Semaglutide | 133 | 4,628 | $139,052.18 | 23 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 126 | 3,722 | $4,125.81 | 39 |
| Tizanidine Hcl | Tizanidine Hcl | 117 | 4,208 | $607.87 | 25 |
| Clopidogrel | Clopidogrel Bisulfate | 98 | 5,925 | $883.90 | 27 |
| Metoprolol Succinate | Metoprolol Succinate | 97 | 5,833 | $684.13 | 27 |
| Quetiapine Fumarate | Quetiapine Fumarate | 93 | 4,020 | $632.43 | 19 |
| Diclofenac Sodium | Diclofenac Sodium | 92 | 4,057 | $1,108.62 | 31 |
| Propranolol Hcl | Propranolol Hcl | 91 | 3,685 | $916.37 | 21 |
| Escitalopram Oxalate | Escitalopram Oxalate | 88 | 4,500 | $565.07 | 26 |
| Montelukast Sodium | Montelukast Sodium | 85 | 5,820 | $618.29 | 26 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-07-15NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
NUCC Taxonomy Code: 207Q00000X
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL PRACTICE
I20040921000945
KY
0547238107
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Healthfirst Bluegrass Inc
496 Southland Dr, Lexington, KY 405031827
Phone: 8592882425
Secondary Practice Locations
576 E Third St Ste 170
Lexington, KY 405082251
Phone: 8592882425
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Advanced Practice Registered Nurse
Nurse Practitioner - Family
Advanced Practice Registered Nurse
Social Worker - Clinical
Licensed Clinical Social Worker
Psychiatry & Neurology - Psychiatry
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner - Family
Advanced Practice Registered Nurse
Nurse Practitioner - Family
Advanced Practice Registered Nurse
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1401 HARRODSBURG RD STE B165, LEXINGTON, KY 405041726 (Tel: 8592882425)
Registered at PO BOX 39597, BELFAST, ME 049151249 (Tel: 8592882425)
Specialist (license number reported to NPPES: KY 33614)
Registered at 576 E THIRD ST STE 170, LEXINGTON, KY 405082251 (Tel: 8592882425)
Registered at 496 SOUTHLAND DR, LEXINGTON, KY 405031827 (Tel: 8592882425)
Family Medicine (license number reported to NPPES: KY 33614)
Registered at 301 SUNSET DR, CANEYVILLE, KY 427219172 (Tel: 2708793711)
Registered at 908 WALLACE AVE, LEITCHFIELD, KY 427541479 (Tel: 2702599580)
Registered at 2091 N BEND RD STE 100, HEBRON, KY 41048 (Tel: 8598171370)
Registered at 9816 LOWER RIVER RD, BURLINGTON, KY 410059624 (Tel: 8596208383)
NPI status registered as active in NPPES database
Registered at 19 S MAIN ST, DRY RIDGE, KY 410357332 (Tel: 8598235441)
Registered at 2300 CHAMBER CENTER DR, SUITE 200, LAKESIDE PARK, KY 410171673 (Tel: 8593445555)
Recorded as GREGORY KOO, MD
Specialist (license number reported to NPPES: KY 33614)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other General Practices in Lexington
- Dr. Nikole Funk, DO
- Dr. Sobia Amjad, MD
- Dr. John Mullins, MD
- Dr. Tabitha Burton, MD
- Dr. Douglas Nesbitt, MD
- Dr. James Owen, MD
Mailing Address
Po Box 39597
Belfast, ME 049151249
Phone: 8592882425