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John Siegfried, MD
NPI 1942314612 · Gastroenterology Physician · Aurora, IL
John Siegfried, MD is a Gastroenterology Physician provider in Aurora, IL (NPI 1942314612).
Provider details
- NPI number
- 1942314612
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-053793 (IL)
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
1221 N Highland Ave
Aurora, IL 60506-1404
Phone: (630) 859-8700
Street-level locationGet directions
Mailing address
1870 W Galena Blvd
Aurora, IL 60506-4356
Registry dates
- Enumerated
- 2006-08-18
- Last updated
- 2011-06-27
Frequently asked questions
- What is John Siegfried's NPI number?
- John Siegfried's National Provider Identifier (NPI) is 1942314612, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Siegfried's specialty?
- John Siegfried is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Siegfried located?
- John Siegfried's practice location on file with NPPES is 1221 N Highland Ave, Aurora, IL 60506-1404.
- What is John Siegfried's phone number?
- The practice phone number listed in the NPPES registry for John Siegfried is (630) 859-8700.
- Is John Siegfried's NPI active?
- Yes — John Siegfried's NPI (1942314612) is active in the NPPES registry as of the last update on 2011-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.