Dr. Gregory W Walker , DO
Surgery - Vascular Surgery โข Toledo, OH
2109 Hughes Dr Ste 450
Toledo, OH 43606
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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Dr. Gregory Walker is listed in NPPES under Surgery - Vascular Surgery.
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NPI assigned on February 4, 2008; this date does not establish years in practice.
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Published CMS data list 1,435 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99213 โ Established patient outpatient office visit: 285 service units.
- 93880 โ Ultrasound of both sides of head and neck blood flow: 241 service units.
- 93970 โ Ultrasound study of arm or leg veins with compression and maneuvers: 195 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 21 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 377 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:
- Clopidogrel (Clopidogrel Bisulfate) โ 116 prescription fills, including refills.
- Cilostazol โ 91 prescription fills, including refills.
- Atorvastatin Calcium โ 60 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 6 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Surgery - Vascular Surgery in Toledo, OH (2024, 15 clinicians with data). Median for this group: 1,262. Middle half: 1,001 to 1,377.
More Medicare Part B services than 85% of clinicians listed under Surgery - Vascular Surgery in Ohio (2024, 152 clinicians with data). Median for this group: 690. Middle half: 363 to 1,050.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 573 in 2020 to 1,435 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
2109 Hughes Dr Ste 450
Toledo, OH 43606
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 3 distinct additional practice-address records in Bowling Green, OH; Sylvania, OH; Tiffin, OH. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Promedica Multi Specialty Physicians. 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
2001
What Public CMS Data Show
Surgery - Vascular Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
1,162 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $94,180 in 2024
The total amount Medicare approved for these services in 2024. 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, 2024.
Paid by Medicare
About $71,627 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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, 2024.
30-day fills
734 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
$54,577 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 2025
All general payments: $521.01 across 11 records.
By nature of payment
- Food and Beverage: $521.01 across 11 records.
Reporting-company totals
- Medtronic, Inc.: $450.72 across 8 records.
- Mozarc Medical US LLC: $70.29 across 3 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 2025 (published June 30, 2026).
Years since graduation
25 years (graduated 2001)
CMS Doctors and Clinicians data list 2001 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
2008
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. Walker 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. Walker 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 Toledo and Ohio
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Surgery - Vascular Surgery in Toledo, OH (2024, 15 clinicians with data). Median for this group: 1,262. Middle half: 1,001 to 1,377.
More Medicare Part B services than 85% of clinicians listed under Surgery - Vascular Surgery in Ohio (2024, 152 clinicians with data). Median for this group: 690. Middle half: 363 to 1,050.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Surgery - Vascular Surgery in Toledo, OH (2024, 15 clinicians with data). Median for this group: $81,250. Middle half: $61,896 to $94,322.
A higher Medicare-allowed amount than 85% of clinicians listed under Surgery - Vascular Surgery in Ohio (2024, 152 clinicians with data). Median for this group: $46,300. Middle half: $29,541 to $79,811.
Paid by Medicare
A higher Medicare payment amount than 75% of clinicians listed under Surgery - Vascular Surgery in Toledo, OH (2024, 15 clinicians with data). Median for this group: $63,972. Middle half: $46,478 to $70,439.
A higher Medicare payment amount than 85% of clinicians listed under Surgery - Vascular Surgery in Ohio (2024, 152 clinicians with data). Median for this group: $34,641. Middle half: $21,156 to $59,884.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Surgery - Vascular Surgery in Toledo, OH (2024, 15 clinicians with data). Median for this group: 358. Middle half: 212 to 493.
More Part D prescriptions than 85% of clinicians listed under Surgery - Vascular Surgery in Ohio (2024, 135 clinicians with data). Median for this group: 145. Middle half: 46 to 249.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Surgery - Vascular Surgery in Toledo, OH (2024, 15 clinicians with data). Median for this group: $70,043. Middle half: $53,760 to $105,069.
A higher Part D drug cost than 80% of clinicians listed under Surgery - Vascular Surgery in Ohio (2024, 135 clinicians with data). Median for this group: $11,950. Middle half: $549 to $39,295.
24 active clinicians are listed under Surgery - Vascular Surgery with a practice address in Toledo, OH (241 in Ohio).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Toledo
0% of these 24 clinicians have the CMS telehealth indicator.
66.7% of these 24 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 150% from 573 in 2020 to 1,435 in 2024.
- 2020: 573
- 2021: 575
- 2022: 597
- 2023: 1,000
- 2024: 1,435
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Medicare-allowed amount
Medicare-allowed amount increased 93% from $48,835 in 2020 to $94,180 in 2024.
- 2020: $48,835
- 2021: $61,125
- 2022: $48,712
- 2023: $57,787
- 2024: $94,180
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Paid by Medicare
Paid by Medicare increased 95% from $36,764 in 2020 to $71,627 in 2024.
- 2020: $36,764
- 2021: $46,204
- 2022: $36,234
- 2023: $43,532
- 2024: $71,627
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 33% from 284 in 2020 to 377 in 2024.
- 2020: 284
- 2021: 335
- 2022: 344
- 2023: 373
- 2024: 377
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30-day fills
30-day fills increased 40% from 524 in 2020 to 734 in 2024.
- 2020: 524
- 2021: 620
- 2022: 604
- 2023: 655
- 2024: 734
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Part D drug cost
Part D drug cost increased 1115% from $4,491 in 2020 to $54,577 in 2024.
- 2020: $4,491
- 2021: $28,205
- 2022: $40,491
- 2023: $50,187
- 2024: $54,577
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $167.23 in 2021 to $521.01 in 2025.
- 2021: $167.23
- 2022: $3,356.61
- 2023: $1,670.13
- 2024: $512.43
- 2025: $521.01
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), 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 2025 (payments made January 1 โ December 31, 2025): 11 records totaling $521.01.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
VALIANT CAPTIVIA | General | $168.25 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
ENDURANT IIS | General | $82.65 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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ENDURANT IIS | General | $64.48 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
VALIANT CAPTIVIA | General | $44.87 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
ENDURANT IIS | General | $31.95 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
HELI-FX ENDOANCHOR SYSTEM | General | $30.90 |
| Mozarc Medical US LLC |
Food and Beverage
Cash or cash equivalent
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CHAMELEON | General | $24.98 |
| Mozarc Medical US LLC |
Food and Beverage
Cash or cash equivalent
|
CHAMELEON | General | $24.15 |
| Mozarc Medical US LLC |
Food and Beverage
Cash or cash equivalent
|
CHAMELEON | General | $21.16 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
ENDURANT IIS | General | $17.34 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
ENDURANT IIS | General | $10.28 |
Source: CMS Open Payments, program year 2025, 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 2016โ2023 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, 2017โ2024; 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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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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285 | 248 | $127.00 | $88.21 |
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93880
Ultrasound of both sides of head and neck blood flow
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241 | 240 | $102.65 | $37.20 |
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93970
Ultrasound study of arm or leg veins with compression and maneuvers
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195 | 191 | $112.00 | $32.28 |
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93971
Ultrasound study of one arm or leg veins with compression and maneuvers
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126 | 122 | $76.00 | $20.67 |
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93923
Complete ultrasound study of arm and leg arteries
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104 | 99 | $75.00 | $21.40 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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87 | 87 | $167.00 | $108.84 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
79 | 65 | $79.00 | $54.62 |
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93978
Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts
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41 | 41 | $110.00 | $37.03 |
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93925
Ultrasound of leg arteries or artery grafts
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39 | 38 | $95.00 | $37.06 |
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93922
Ultrasound study of arm and leg arteries
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38 | 38 | $32.00 | $11.69 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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24 | 20 | $127.00 | $77.75 |
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99152
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes
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23 | 20 | $25.00 | $12.01 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
23 | 23 | $315.00 | $164.50 |
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93926
Ultrasound of one leg arteries or artery grafts
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22 | 22 | $64.00 | $22.80 |
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99221
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes
|
19 | 19 | $177.00 | $81.67 |
|
36902
Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist
|
18 | 14 | $494.00 | $232.86 |
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93975
Complete ultrasound of abdomen and pelvis artery and vein blood flow
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17 | 17 | $292.00 | $54.06 |
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35301
Removal of blood clot and portion of chest, neck, or brain artery
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14 | 14 | $3853.00 | $1107.29 |
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93923
Complete ultrasound study of arm and leg arteries
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14 | 14 | $75.00 | $21.23 |
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75630
Review by radiologist of abdominal aorta and both leg arteries image
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13 | 12 | $289.00 | $92.14 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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13 | 13 | $239.00 | $128.58 |
Source: CMS Part B by Provider and Service, 2024; 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 |
|---|---|---|---|---|---|
| Clopidogrel | Clopidogrel Bisulfate | 116 | 7,950 | $1,512.29 | 30 |
| Cilostazol | Cilostazol | 91 | 4,766 | $1,535.26 | 20 |
| Atorvastatin Calcium | Atorvastatin Calcium | 60 | 3,180 | $461.86 | 15 |
| Warfarin Sodium | Warfarin Sodium | 47 | 3,450 | $728.38 | 13 |
| Eliquis | Apixaban | 35 | 1,304 | $24,541.23 | โ |
| Xarelto | Rivaroxaban | 28 | 1,360 | $25,798.13 | โ |
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
NUCC Taxonomy Code: 2086S0129X
A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - VASCULAR SURGERY
I20231129002027
MI
5799859203
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
Promedica Multi Specialty Physicians
777 Kimole Ln, Adrian, MI 492211400
Phone: 5172650292
Promedica Multi Specialty Physicians
2109 Hughes Dr, Toledo, OH 436063858
Phone: 4192912003
Secondary Practice Locations
5700 Monroe St Unit 309
Sylvania, OH 435602768
Phone: 4192912090
81 Ashwood Dr
Tiffin, OH 448832546
Phone: 4192912003
960 W Wooster St Ste 110
Bowling Green, OH 434022646
Phone: 4192912003
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Nurse Practitioner - Adult Health
Certified Nurse Practitioner
Physician Assistant
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2109 HUGHES DR STE 450, TOLEDO, OH 43606 (Tel: 4192513112)
Registered at 2109 HUGHES DR STE 450, TOLEDO, OH 436065102 (Tel: 4192513112)
NPI status registered as active in NPPES database
Registered at 2213 CHERRY ST, STE #303, TOLEDO, OH 436082603 (Tel: 4192513112)
Registered at 2213 CHERRY ST, STE #303, TOLEDO, OH 436082603 (Tel: 4192513112)
Recorded as GREGORY WALKER, D.O.
Surgery (license number reported to NPPES: OH 34.008756)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery - Vascular Surgery Specialists in Toledo
- Dr. Sophia Afridi, MD
- Dr. Mohammad Afridi, MD
- Dr. Todd Russell, MD
- Dr. Chompunut Asava Aree, MD
- Dr. David Vicente, MD
- Dr. John Fish, MD
Mailing Address
2109 Hughes Dr Ste 450
Toledo, OH 436065102
Phone: 4192513112