William Ashwander, M.D.
NPI 1649414970 · Vascular Surgery Physician · North Charleston, SC
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Ashwander, M.D. is a Vascular Surgery Physician provider in North Charleston, SC (NPI 1649414970).
Provider details
- NPI number
- 1649414970
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 39815 (SC)
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
17 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
1,932 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 | 281 | $85 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 191 | $20 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 173 | $36 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 143 | $119 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 135 | $156 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 |
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 | 57 | 16 |
| Apixabanbrand: Eliquis | 24 | — |
| Tramadol Hcl | 24 | 17 |
| Atorvastatin Calcium | 20 | — |
| Diazepam | 16 | 16 |
| Simvastatin | 13 | — |
Medicare Part D only. 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.
$482 across 14 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
- 2009-04-30
- Last updated
- 2024-02-12
- Certified
- 2024-02-12
Frequently asked questions
- What is William Ashwander's NPI number?
- William Ashwander's National Provider Identifier (NPI) is 1649414970, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ashwander's specialty?
- William Ashwander is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is William Ashwander located?
- William Ashwander's practice location on file with NPPES is 2575 Elms Center Rd Ste 200, North Charleston, SC 29406-9875.
- What is William Ashwander's phone number?
- The practice phone number listed in the NPPES registry for William Ashwander is (843) 724-1950.
- Does William Ashwander accept Medicare?
- William Ashwander is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Ashwander's NPI active?
- Yes — William Ashwander's NPI (1649414970) is active in the NPPES registry as of the last update on 2024-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.