William Listwan, MD
NPI 1528007028 · Internal Medicine Physician · West Allis, WI
William Listwan, MD is a Internal Medicine Physician provider in West Allis, WI (NPI 1528007028).
Provider details
- NPI number
- 1528007028
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16862 (WI)
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2011-01-04
Frequently asked questions
- What is William Listwan's NPI number?
- William Listwan's National Provider Identifier (NPI) is 1528007028, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Listwan's specialty?
- William Listwan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Listwan located?
- William Listwan's practice location on file with NPPES is 555 S 108th St, West Allis, WI 53214-1100.
- What is William Listwan's phone number?
- The practice phone number listed in the NPPES registry for William Listwan is (414) 566-8210.
- Is William Listwan's NPI active?
- Yes — William Listwan's NPI (1528007028) is active in the NPPES registry as of the last update on 2011-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.