William Lewis, DO
NPI 1265401350 · Internal Medicine Physician · Austin, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Lewis, DO is a Internal Medicine Physician provider in Austin, TX (NPI 1265401350).
Provider details
- NPI number
- 1265401350
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- L8414 (TX)
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
20 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
2,455 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 | 381 | $91 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 284 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 240 | $130 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 202 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 185 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 140 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 145 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 429 | 128 |
| Levothyroxine Sodium | 394 | 99 |
| Amlodipine Besylate | 282 | 80 |
| Simvastatin | 231 | 60 |
| Losartan Potassium | 215 | 62 |
| Lisinopril | 203 | 56 |
| Alprazolam | 195 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$787 across 45 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
- 2006-03-14
- Last updated
- 2022-02-01
Frequently asked questions
- What is William Lewis's NPI number?
- William Lewis's National Provider Identifier (NPI) is 1265401350, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Lewis's specialty?
- William Lewis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Lewis located?
- William Lewis's practice location on file with NPPES is 12221 N Mopac Expy, Austin, TX 78758-2401.
- What is William Lewis's phone number?
- The practice phone number listed in the NPPES registry for William Lewis is (512) 901-4009.
- Does William Lewis accept Medicare?
- William Lewis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Lewis's NPI active?
- Yes — William Lewis's NPI (1265401350) is active in the NPPES registry as of the last update on 2022-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.