JOHN D SIEKMANN (DDS) – Dentist, NPI 1336240191

JOHN D SIEKMANN (DDS) is a healthcare provider. based in Gurnee, Illinois. specializing in Dentist. They hold the professional credentials DDS. The NPI Number for JOHN D SIEKMANN (DDS) is 1336240191

Main info

Male
Name
JOHN D SIEKMANN (DDS)
NPI
1336240191
Phone
(847) 662-3100
Address
101 S GREENLEAF ST
Enumeration Date
26 September 2006
Last Update Date
8 July 2007
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience43
Completeness75
Years active:19State licenses:0Digital endpointsOther names

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Provider Addresses for JOHN D SIEKMANN (DDS)

  • North Greenleaf Street, Gurnee, Lake County, Illinois, 60031, United States

    SUITE E

    GURNEE, IL 600313369

    Phone: (847) 662-3100

    Fax: (847) 662-3125

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

CMS reports 2 Open Payments records for all available years, with a total value of $29.

Total Amount is formed as General ($29) + Research ($0) + Ownership ($0) = $29.

Last reported payment date: 2024-09-17 • Largest payer in this snapshot: Dentsply Sirona Inc ($17).

Total Amount

$29

General + Research + Ownership

Payments

2

Total payment records

General Amount

$29

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2024-09-17

Latest reported date

Top Companies

Largest payers in this snapshot

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 60031)

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Reviews

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Frequently asked questions

How do I look up JOHN D SIEKMANN (DDS) by NPI?
Use NPI 1336240191 when you need to reference JOHN D SIEKMANN (DDS) in forms, claims, or directories.
Is JOHN D SIEKMANN (DDS) active in the national directory?
JOHN D SIEKMANN (DDS)'s public NPI profile is in an active state.
What does JOHN D SIEKMANN (DDS) treat or focus on?
Patients typically see JOHN D SIEKMANN (DDS) under the specialty Dentist. Clinical services aligned with this taxonomy classification.
Where is JOHN D SIEKMANN (DDS)'s primary listing?
We display Gurnee, Illinois because that is what the record indicates for JOHN D SIEKMANN (DDS).
What if Gurnee, Illinois seems incomplete?
Street-level detail can be omitted — open the full address list for this NPI.

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