Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ROBERT N HOLDEFER PH.D.
NPI 1699714832
Specialist/Technologist, Other - Electroneurodiagnostic in Milwaukee, WI

Q: What is Robert Holdefer's NPI number?

The NPI number for Robert Holdefer is 1699714832. It was assigned to this individual provider in the NPPES registry on June 5, 2006.

Q: What is Robert Holdefer's specialty?

The primary specialty registered for this NPI is Specialist/Technologist, Other, specializing in Electroneurodiagnostic, with taxonomy code 246ZE0600X.

Q: When was this NPI record last updated?

The NPPES record for Robert Holdefer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 32 days 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.

Active since June 05, 2006

8832 N PORT WASHINGTON RD, SUITE 240, MILWAUKEE, WI 53217(414) 351-6666(414) 351-6999 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Robert N Holdefer Ph.d. NPPES

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

ROBERT N HOLDEFER PH.D. (NPI 1699714832) is an individual electroneurodiagnostic provider in Milwaukee, Wisconsin and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1699714832

Entity TypeIndividualMale

Primary Taxonomy246ZE0600X

Provider Legal NameROBERT N HOLDEFERCredential: PH.D.

Location Address8832 N PORT WASHINGTON RD, SUITE 240Milwaukee, WI 53217-1628

Mailing Address8832 N Port Washington Rd, Suite 240Milwaukee, WI 53217-1628 · (414) 351-6666 · Fax (414) 351-6999

Phone(414) 351-6666

Fax(414) 351-6999

Sole ProprietorNo

Enumeration DateJune 5, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1699714832 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialist/Technologist, Other · ElectroneurodiagnosticTechnologists, Technicians & Other Technical Service Providers

Taxonomy Code246ZE0600X

8832 N PORT WASHINGTON RD, Milwaukee, WI 53217

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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 Robert Holdefer's NPI number?

The NPI number for Robert Holdefer is 1699714832. It was assigned to this individual provider in the NPPES registry on June 5, 2006.

Where is Robert Holdefer located?

Robert Holdefer practices at 8832 N Port Washington Rd Suite 240, Milwaukee, WI 53217. The listed phone number is (414) 351-6666.

What is Robert Holdefer's specialty?

The primary specialty registered for this NPI is Specialist/Technologist, Other, specializing in Electroneurodiagnostic, with taxonomy code 246ZE0600X.

When was this NPI record last updated?

The NPPES record for Robert Holdefer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 32 days 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.