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Deactivated NPI 1205999711 Deactivated / Inactive NPI Male Practitioner

Dr. John P Holzer , DDS

Dentist • Niles, IL

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Notice of NPI Deactivation & Inactive Practice Status

According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Dr. John Holzer has officially deactivated this NPI record and ceased active healthcare practice.

Registration / Start Date December 18, 2006
NPI Deactivation Date March 06, 2025
Total Practice Duration ~19 Years of Practice (2006 – 2025)

Professional Overview & Biography Verified Profile Summary

Dr. John Holzer, DDS was a registered Dentist practicing in Niles, IL. Throughout an active medical career spanning 19 years, Dr. Holzer provided care at the practice location at 241 GOLF MILL CENTER until profile deactivation on 2025-03-06.

Practice Location & Contact Primary Location

Practice Address

241 Golf Mill Center
Suite 812

Niles, IL 607141215

Telephone 8472985885
Fax 8472982938
Associated Practice Facility / Clinic
🏢 Jorge Aliaga, M.d.,s.c. Facility NPI 1366545857

Specialty Benchmarks & Practice Insights

Comparative analytics for Dentist in Niles, IL

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.5 Yrs
State Avg: 12.1 Yrs
Regional Practice Density
19 Specialists

Practicing in Niles, IL (4751 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Dentist Primary Specialty

NUCC Taxonomy Code: 122300000X

State License IL A10511

A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

1 Associated Practitioners
Dr. Mark Holzer , DDS, RPH

Dentist - General Practice

NPI 1396893764

Doctor of Dental Surgery, Registered Pharmacist

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

7 Historical Events
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NPI Profile Deactivated March 06, 2025

Record deactivated on March 06, 2025

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

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Updated Practice Location July 08, 2007

Registered at 241 GOLF MILL CENTER, SUITE 812, NILES, IL 607141215 (Tel: 8472985885)

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Updated Business Mailing Address July 08, 2007

Registered at 241 GOLF MILL CENTER, SUITE 812, NILES, IL 607141215 (Tel: 8472985885)

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Provider Name / Credentials Updated July 08, 2007

Recorded as JOHN HOLZER, DDS

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Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Dentist (License #A10511 in IL)

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Initial NPI Registration & Enumeration December 18, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1205999711
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: December 18, 2006
Last Update: July 08, 2007
Deactivation Date: March 06, 2025

Mailing Address

241 Golf Mill Center, Suite 812

Niles, IL 607141215

Phone: 8472985885

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.