Stephen Tonks, MD
NPI 1689937989 · Vascular Surgery Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Tonks, MD is a Vascular Surgery Physician provider in Knoxville, TN (NPI 1689937989).
Provider details
- NPI number
- 1689937989
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 56350 (TN)
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
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,223 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) |
|---|---|---|
| Ultrasound Study of Arm and Leg Arteries93922 | 303 | $60 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 132 | $83 |
| Ultrasound of Leg Arteries Or Artery Grafts93925 | 129 | $213 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 99 | $159 |
| Ultrasound of Aorta, Vena Cava, Groin Vessels Or Bypass Grafts93979 | 80 | $96 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 74 | $118 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 269 | 96 |
| Alprazolam | 27 | 21 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 27 | 25 |
| Naproxen | 16 | 13 |
| Tramadol Hcl | 13 | 11 |
| Cilostazol | 13 | — |
| Apixaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,691 across 24 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
Registry dates
- Enumerated
- 2012-06-21
- Last updated
- 2020-08-21
- Certified
- 2020-08-21
Frequently asked questions
- What is Stephen Tonks's NPI number?
- Stephen Tonks's National Provider Identifier (NPI) is 1689937989, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Tonks's specialty?
- Stephen Tonks is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Tonks located?
- Stephen Tonks's practice location on file with NPPES is 6408 Papermill Dr, Knoxville, TN 37919-4858.
- What is Stephen Tonks's phone number?
- The practice phone number listed in the NPPES registry for Stephen Tonks is (886) 588-8229.
- Does Stephen Tonks accept Medicare?
- Stephen Tonks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Tonks's NPI active?
- Yes — Stephen Tonks's NPI (1689937989) is active in the NPPES registry as of the last update on 2020-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.