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MR. STEVEN P ZENKER MD
NPI 1861485708
Pediatrics in Alton, IL

Active since August 25, 2005PECOS Enrolled
1 PROFESSIONAL DR STE 250, ALTON, IL 62002(618) 463-8636(618) 463-8640 Get Directions Write a Review

NPPES record last updated: October 21, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 8, 2025, Apr 18, 2024, Nov 1, 2021 (3 updates tracked since 2021).

About Mr. Steven P Zenker Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. STEVEN P ZENKER MD (NPI 1861485708) is an individual pediatrics provider in Alton, Illinois, licensed in Illinois (036-075124) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861485708
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameMR. STEVEN P ZENKERCredential: MD
Location Address1 PROFESSIONAL DR STE 250Alton, IL 62002-5068
Mailing AddressPo Box 959203Saint Louis, MO 63195-9203 · (618) 463-8500 · Fax (618) 433-8640
Phone(618) 463-8636
Fax(618) 463-8640
Sole ProprietorNo
Enumeration DateAugust 25, 2005
Last NPPES UpdateOctober 21, 20253 updates tracked since enumeration
NPPES CertifiedOctober 21, 2025
✔ NPI 1861485708 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in IL · 036-075124
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
1 PROFESSIONAL DR STE 250, Alton, IL 62002
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. Steven P Zenker Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62002 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.44 typical visit price
range $56.28 – $173.35
Typical copayment $22.11 (range $14.07 – $43.33)
Most-billed visit code 99203
Established Patient
$99.71 typical visit price
range $17.51 – $139.99
Typical copayment $24.92 (range $4.37 – $34.99)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Steven Zenker's NPI number?

The NPI number for Steven Zenker is 1861485708. It was assigned to this individual provider in the NPPES registry on August 25, 2005.

Where is Steven Zenker located?

Steven Zenker practices at 1 Professional Dr Ste 250, Alton, IL 62002. The listed phone number is (618) 463-8636.

What is Steven Zenker's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Steven Zenker enrolled in Medicare?

Yes. Steven Zenker is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Steven Zenker was last updated on October 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.