JOHN MICHAEL DUFFEY LPC
NPI 1043794324
Counselor - Professional in Greenfield, WI

Q: What is John Duffey's NPI number?

The NPI number for John Duffey is 1043794324. It was assigned to this individual provider in the NPPES registry on September 21, 2018.

Q: What is John Duffey's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

Q: When was this NPI record last updated?

The NPPES record for John Duffey was last updated on July 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.

Active since September 21, 2018

CHILD & FAMILY THERAPEUTIC SYSTEMS, 4811 S 76 STREET #305, GREENFIELD, WI 53220(414) 325-7741 Get Directions Write a Review

NPPES record last updated: July 1, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 1, 2025, Sep 21, 2018 (2 updates tracked since 2018).

On this page

About John Michael Duffey Lpc NPPES

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

JOHN MICHAEL DUFFEY LPC (NPI 1043794324) is an individual professional provider in Greenfield, Wisconsin, licensed in Wisconsin (7094-125) and active in the NPI registry since September 2018.

NPPES Registry Identity

NPI1043794324

Entity TypeIndividualMale

Primary Taxonomy101YP2500X

Provider Legal NameJOHN MICHAEL DUFFEYCredential: LPC

Location AddressCHILD & FAMILY THERAPEUTIC SYSTEMS, 4811 S 76 STREET #305Greenfield, WI 53220-4364

Mailing Address7100 W Bluemound RdWauwatosa, WI 53213-3723 · (414) 248-6502

Phone(414) 325-7741

Sole ProprietorYes

Enumeration DateSeptember 21, 2018

Last NPPES UpdateJuly 1, 20252 updates tracked since enumeration

NPPES CertifiedJune 13, 2025

✔ NPI 1043794324 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · ProfessionalBehavioral Health & Social Service Providers

Taxonomy Code101YP2500X

License✔ Licensed in WI · 7094-125

CHILD & FAMILY THERAPEUTIC SYSTEMS, Greenfield, WI 53220

Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), HealthPartners and more.Insurance ›

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 John Duffey's NPI number?

The NPI number for John Duffey is 1043794324. It was assigned to this individual provider in the NPPES registry on September 21, 2018.

Where is John Duffey located?

John Duffey practices at Child & Family Therapeutic Systems 4811 S 76 Street #305, Greenfield, WI 53220. The listed phone number is (414) 325-7741.

What is John Duffey's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

What insurance does John Duffey accept?

Health plans from Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), HealthPartners, Medica and Network Health and 1 other insurer list John Duffey as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for John Duffey was last updated on July 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.