Gregory Walker, D.O.
NPI 1134307978 · Vascular Surgery Physician · Toledo, OH
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Walker, D.O. is a Vascular Surgery Physician provider in Toledo, OH (NPI 1134307978).
Provider details
- NPI number
- 1134307978
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 34.008756 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,435 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 285 | $88 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 241 | $37 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 195 | $32 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 126 | $21 |
| Complete Ultrasound Study of Arm and Leg Arteries93923 | 104 | $21 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 87 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 116 | 30 |
| Cilostazol | 91 | 20 |
| Atorvastatin Calcium | 60 | 15 |
| Warfarin Sodium | 47 | 13 |
| Apixabanbrand: Eliquis | 35 | — |
| Rivaroxabanbrand: Xarelto | 28 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$476 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 960 W Wooster St Ste 110Bowling Green, OH 43402-2646Phone: (419) 291-2003Fax: (419) 479-6977
- 5700 Monroe St Unit 309Sylvania, OH 43560-2768Phone: (419) 291-2090Fax: (419) 749-6135
- 81 Ashwood DrTiffin, OH 44883-2546Phone: (419) 291-2003Fax: (419) 479-6977
Registry dates
- Enumerated
- 2008-02-04
- Last updated
- 2023-11-03
Frequently asked questions
- What is Gregory Walker's NPI number?
- Gregory Walker's National Provider Identifier (NPI) is 1134307978, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Walker's specialty?
- Gregory Walker is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Walker located?
- Gregory Walker's practice location on file with NPPES is 2109 Hughes Dr Ste 450, Toledo, OH 43606.
- What is Gregory Walker's phone number?
- The practice phone number listed in the NPPES registry for Gregory Walker is (419) 251-3112.
- Does Gregory Walker accept Medicare?
- Gregory Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Walker's NPI active?
- Yes — Gregory Walker's NPI (1134307978) is active in the NPPES registry as of the last update on 2023-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.