William Lewis, M.D.
NPI 1437237369 · Colon & Rectal Surgery Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Colorectal Surgery (proctology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Lewis, M.D. is a Colon & Rectal Surgery Physician provider in San Antonio, TX (NPI 1437237369).
Provider details
- NPI number
- 1437237369
- Entity type
- Individual
- Primary specialty
- Colon & Rectal Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- K8936 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
273 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 56 | $86 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 38 | $106 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 34 | $159 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 29 | $209 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 25 | $172 |
| Colorectal Cancer Screening; Colonoscopy on Individual Not Meeting Criteria for High Risk |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 49 | 48 |
| 0.9 % Sodium Chloridebrand: Sodium Chloride | 45 | — |
| Tramadol Hcl | 37 | 34 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 36 | 30 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 29 | 27 |
| Cholestyramine (with Sugar)brand: Cholestyramine | 22 |
Practice location
Mailing address
Additional practice locations (1)
- 8042 Wurzbach RdSuite 310San Antonio, TX 78229-3818Phone: (210) 614-5113Fax: (210) 616-0024
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2022-07-21
Frequently asked questions
- What is William Lewis's NPI number?
- William Lewis's National Provider Identifier (NPI) is 1437237369, 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 Colon & Rectal Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is William Lewis located?
- William Lewis's practice location on file with NPPES is 18707 Hardy Oak Blvd Ste 210, San Antonio, TX 78258-4803.
- What is William Lewis's phone number?
- The practice phone number listed in the NPPES registry for William Lewis is (210) 593-2500.
- 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 (1437237369) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.