IndividualActive
John Bylewski, MD
NPI 1205931243 · Internal Medicine Physician · Chicago, IL
John Bylewski, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1205931243).
Provider details
- NPI number
- 1205931243
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036070127 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
4900 S Archer Ave
Suite 5
Chicago, IL 60632
Phone: (773) 767-5950
Fax: (773) 767-5946
Street-level locationGet directions
Mailing address
4900 S Archer Ave
Chicago, IL 60632
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2009-12-02
Frequently asked questions
- What is John Bylewski's NPI number?
- John Bylewski's National Provider Identifier (NPI) is 1205931243, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Bylewski's specialty?
- John Bylewski is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Bylewski located?
- John Bylewski's practice location on file with NPPES is 4900 S Archer Ave, Chicago, IL 60632.
- What is John Bylewski's phone number?
- The practice phone number listed in the NPPES registry for John Bylewski is (773) 767-5950.
- Is John Bylewski's NPI active?
- Yes — John Bylewski's NPI (1205931243) is active in the NPPES registry as of the last update on 2009-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.