William Janss, MD
NPI 1558377325 · Internal Medicine Physician · El Paso, TX
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Janss, MD is a Internal Medicine Physician provider in El Paso, TX (NPI 1558377325).
Provider details
- NPI number
- 1558377325
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- K4462 (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 tenure38% of score
19 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-31
- Last updated
- 2015-04-14
Frequently asked questions
- What is William Janss's NPI number?
- William Janss's National Provider Identifier (NPI) is 1558377325, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Janss's specialty?
- William Janss is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Janss located?
- William Janss's practice location on file with NPPES is 221 N Kansas St, El Paso, TX 79901-1443.
- What is William Janss's phone number?
- The practice phone number listed in the NPPES registry for William Janss is (915) 546-9200.
- Does William Janss accept Medicare?
- William Janss is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Janss's NPI active?
- Yes — William Janss's NPI (1558377325) is active in the NPPES registry as of the last update on 2015-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.