William Kowallis
NPI 1053112227 · Internal Medicine Physician · Boise, ID
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Kowallis is a Internal Medicine Physician provider in Boise, ID (NPI 1053112227).
Provider details
- NPI number
- 1053112227
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 3071460 (ID)
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
1 yr 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
- 2025-03-22
- Last updated
- 2025-06-01
- Certified
- 2025-06-01
Frequently asked questions
- What is William Kowallis's NPI number?
- William Kowallis's National Provider Identifier (NPI) is 1053112227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Kowallis's specialty?
- William Kowallis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Kowallis located?
- William Kowallis's practice location on file with NPPES is 500 W Fort St # 111r, Boise, ID 83702-4599.
- What is William Kowallis's phone number?
- The practice phone number listed in the NPPES registry for William Kowallis is (208) 422-1000.
- Does William Kowallis accept Medicare?
- William Kowallis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Kowallis's NPI active?
- Yes — William Kowallis's NPI (1053112227) is active in the NPPES registry as of the last update on 2025-06-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.