William Atlas, M.D.
NPI 1902881535 · Internal Medicine Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Atlas, M.D. is a Internal Medicine Physician provider in San Antonio, TX (NPI 1902881535).
Provider details
- NPI number
- 1902881535
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- H9186 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 96 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 324 | 88 |
| Levothyroxine Sodium | 207 | 45 |
| Olmesartan Medoxomil | 188 | 41 |
| Rosuvastatin Calcium | 144 | 39 |
| Amlodipine Besylate | 130 | 33 |
| Gabapentin | 118 | 20 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-06
- Last updated
- 2016-01-06
Frequently asked questions
- What is William Atlas's NPI number?
- William Atlas's National Provider Identifier (NPI) is 1902881535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Atlas's specialty?
- William Atlas is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Atlas located?
- William Atlas's practice location on file with NPPES is 540 Madison Oak Dr, San Antonio, TX 78258-3943.
- What is William Atlas's phone number?
- The practice phone number listed in the NPPES registry for William Atlas is (210) 404-9220.
- Does William Atlas accept Medicare?
- William Atlas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Atlas's NPI active?
- Yes — William Atlas's NPI (1902881535) is active in the NPPES registry as of the last update on 2016-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.