Steven Zenker, MD
NPI 1861485708 · Pediatrics Physician · Alton, IL
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Zenker, MD is a Pediatrics Physician provider in Alton, IL (NPI 1861485708).
Provider details
- NPI number
- 1861485708
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-075124 (IL)
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
- 2005-08-25
- Last updated
- 2025-10-21
- Certified
- 2025-10-21
Frequently asked questions
- What is Steven Zenker's NPI number?
- Steven Zenker's National Provider Identifier (NPI) is 1861485708, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Zenker's specialty?
- Steven Zenker is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Zenker located?
- Steven Zenker's practice location on file with NPPES is 1 Professional Dr Ste 250, Alton, IL 62002-5068.
- What is Steven Zenker's phone number?
- The practice phone number listed in the NPPES registry for Steven Zenker is (618) 463-8636.
- Does Steven Zenker accept Medicare?
- Steven Zenker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Zenker's NPI active?
- Yes — Steven Zenker's NPI (1861485708) is active in the NPPES registry as of the last update on 2025-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.