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John Janczakowski, MD
NPI 1306862107 · Pediatrics Physician · Green Bay, WI
John Janczakowski, MD is a Pediatrics Physician provider in Green Bay, WI (NPI 1306862107).
Provider details
- NPI number
- 1306862107
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 36779 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 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
2793 Lineville Rd
Green Bay, WI 54313-7152
Phone: (920) 496-4700
Fax: (920) 272-1619
Street-level locationGet directions
Mailing address
Po Box 19070
Green Bay, WI 54307-9070
Registry dates
- Enumerated
- 2006-07-14
- Last updated
- 2008-07-24
Frequently asked questions
- What is John Janczakowski's NPI number?
- John Janczakowski's National Provider Identifier (NPI) is 1306862107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Janczakowski's specialty?
- John Janczakowski is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is John Janczakowski located?
- John Janczakowski's practice location on file with NPPES is 2793 Lineville Rd, Green Bay, WI 54313-7152.
- What is John Janczakowski's phone number?
- The practice phone number listed in the NPPES registry for John Janczakowski is (920) 496-4700.
- Is John Janczakowski's NPI active?
- Yes — John Janczakowski's NPI (1306862107) is active in the NPPES registry as of the last update on 2008-07-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.